Relevant bibliographies by topics / Ni-based superalloy

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Academic literature on the topic 'Ni-based superalloy'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 December 2024

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Journal articles on the topic "Ni-based superalloy"

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Yuan, Kang, Robert Eriksson, Ru Lin Peng, Xin Hai Li, Sten Johansson, and Yan Dong Wang. "Interdiffusion and Microstructure Simulation in Ni and Co Based Overlay Coatings on a Ni Based Superalloy at High Temperatures." Advanced Materials Research 922 (May 2014): 850–55. http://dx.doi.org/10.4028/www.scientific.net/amr.922.850.

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In turbine engines, Ni or Co based alloys are used at high temperature, either as base materials, superalloys, or deposited on the surface of superalloys, as coatings. In the present study, two different MCrAlY overlay coatings, Ni and Co based, on a Ni based superalloy IN792 were aged for different times in air at three temperatures, 900°C, 1000°C and 1100°C. The aging processes were simulated by using DICTRA software by focusing on the interdiffusion behavior in the superalloy-coating systems. The results of simulation captured the main microstructural features observed and were used to analyze the diffusion behavior of alloying elements and the corresponding microstructure development. It was found that coating composition and temperature affected significantly the microstructure near the superalloy-coating interface, and their relations were mapped as a summary.
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Selvaraj, Senthil Kumaran, G. Sundaramali, S. Jithin Dev, R. Srii Swathish, Rahul Karthikeyan, K. E. Vijay Vishaal, and Velmurugan Paramasivam. "Recent Advancements in the Field of Ni-Based Superalloys." Advances in Materials Science and Engineering 2021 (December 27, 2021): 1–60. http://dx.doi.org/10.1155/2021/9723450.

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In this review article, research papers related to recent developments in Ni-superalloy technologies have been reviewed in order to provide an insight into recent achievements and the potential for further study, research, and development in this field. In this paper, studies on various aspects of Ni-based superalloys are reviewed, such as production methods, which include widely used casting methods, as well as unconventional alternative procedures, novel techniques, or simulation and prediction of certain alloy casting properties. Reviewing was done by categorising the papers into 4 major categories: manufacturing of Ni-based superalloys, effects of alloying elements, physical and mechanical properties of Ni-based superalloys, and defects in Ni-based superalloys. The process used to make Ni-superalloy parts can have a huge impact on the production process efficiency, the final product’s quality and properties, and the defects formed in it. Investment casting is one of the most common methods for making Ni-superalloy parts. Manufacturing covers studies on various casting methods used to make Ni-based superalloy components, novel techniques and methods developed to improve casting procedures to produce better products, and alternative manufacturing methods like AM and HIP processing. Similar to production process, the role of alloying elements is also very important. Even minor changes in their compositions can cause significant changes in the final product. Simultaneously, these alloying elements appear to be more efficient in the development of new methods to control product quality, suppress defect formation, and improve material properties such as the creep and fatigue. As a result, the effects of various alloying elements used in castings of Ni-based superalloys are thoroughly examined. A material’s properties are its most important components. They assist the industrialist in selecting or developing a material based on the needs of the application/use. With this in mind, many researchers have conducted extensive research on physical and mechanical properties, as well as how to improve them. Fatigue life, stress rupture, creep properties, impact ductility, strain response, stress relaxation behaviour, and so on are some of the most important physical and mechanical properties of Ni-superalloys. This article thoroughly reviews various studies on these properties, how and by what factors they are affected, and how they can be improved. Another important factor to consider when making Ni-superalloy castings is defect formation, which can affect the properties of the final product. Freckle defects, hot tears, porosities, and slivers are some of the major defects that occur in Ni-superalloys during the casting process. This article also reviews in detail about these defects, how they form, and how they affect the final product. These defects were found to have a significant influence on a variety of properties, such as creep, fatigue behaviour, and fracture mechanism. Topics and areas such as reinforcement of Ni-superalloys with the help of CNCs and 3D printing of Ni-superalloys that can provide scope for potential future research are highlighted based on the above-reviewed papers.
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Monteiro, Waldemar A., and Ingrid A. Dos Santos. "Microstructural evolution of a nickel-based superalloy." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 4 (August 1990): 936–37. http://dx.doi.org/10.1017/s0424820100177817.

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Superalloys are indispensable for the superior perfomance and efficien of jet engine turbine disks,turbine blades,combustors,roket shells and many other devices and components used in various industries, in Cluding nuclear, space and aeronautics.Over the last thirty years,nickel-base superalloys has undergone more structural studies than any other superalloy as a result of attempts to correlate its properties to microstructure and heat treatment. To avoid contradictory or inconsistent findings, it is also necessary a carefully microstructural observation of the employed starting materials. In the present paper,we report morphologies relating to the as cast , forged and heat-treated Ni-base superalloy by transmission and scanning electron microscopy. This superalloy contain intermettallic compounds and carbides. The alloy in study was an as cast and also forged Ni-Fe based superalloy with the following chemical composition:
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Taheri, Morteza, Ali Salemi Golezani, and Korosh Shirvani. "Effect of Aluminide Coating on Rapture Behavior of Ni-Based Superalloy GTD-111 in High Temperature." Advanced Materials Research 457-458 (January 2012): 330–33. http://dx.doi.org/10.4028/www.scientific.net/amr.457-458.330.

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GTD-111 superalloys are of the newest Ni-based superalloys which because of having good stability and strength in high temperatures are used in manufacturing of hot-gas-path parts of the gas turbines. Because of severe working conditions, application of these superalloys without coating isn't recommended. For this purpose, firstly the superalloy is coated and then is used. In this paper, the effect of Aluminide coating on rapture behavior of the GTD-111 superalloy is investigated. For this purpose, a number of samples made from GTD-111 superalloy have been coated by powder cementation method and have been subjected to rapture test and have been compared to uncoated samples. The results suggest that the presence of coating causes increase of Al content in the surface and contributes in stability of γ´ which is the most important factor of superalloy strength and also causes more life cycle of this superalloy with respect to similar uncoated samples.
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Zhang, Lihui, Erkang Liu, Weijie Xing, Zhaojiang Xue, Wenjie Fan, Yunsong Zhao, Yushi Luo, Changchun Ge, and Min Xia. "The Formation Mechanism of Oxide Inclusions in a High-Aluminum Ni-Based Superalloy during the Vacuum Induction Remelting Process." Metals 14, no. 6 (May 30, 2024): 654. http://dx.doi.org/10.3390/met14060654.

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Oxide inclusions in Ni-based superalloys play a crucial role in determining their mechanical properties, oxidation resistance, and corrosion resistance at high temperatures. In this paper, the source and formation mechanism of different types of oxide inclusions in a high-aluminum Ni-based superalloy were systematically studied. An automatic field emission scanning electron microscope equipped with an energy dispersive spectrometer and a self-designed superalloy inclusion analysis standard was utilized to quantitatively reveal the oxide inclusion characteristics of the high-aluminum Ni-based superalloy prepared via vacuum induction melting (VIM) and vacuum induction remelting (VIR) processes. The experimental results indicate that the typical oxide inclusions in the Ni-based superalloy before the VIR process are irregular MgO·Al2O3 inclusions with sizes of less than 2 μm. After the VIR process, the typical oxide inclusions in the Ni-based superalloy are also MgO·Al2O3 inclusions. However, these oxide inclusions can be classified into three categories: (i) endogenous irregular MgO·Al2O3 inclusions, less than 4.3 μm in size, inherited from the master alloy; (ii) several hundred-micron film-like MgO·Al2O3 inclusions generated as interface reaction products between the MgO crucible and melts; and (iii) millimeter-scale MgO·Al2O3 inclusions and several tens of microns of MgO inclusions from the exfoliation of the MgO crucible matrix.
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Liu, Guanlan, Shengwei Sun, Yaoyun Hu, and Qinglong Zhao. "The Effect of TiC–TiB2 Dual-Phase Nanoparticles on the Microstructure and Mechanical Properties of Cast Ni–Fe-Based Superalloys." Materials 17, no. 23 (November 25, 2024): 5781. http://dx.doi.org/10.3390/ma17235781.

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TiC–TiB2 dual-phase nanoparticles were added into a Ni–Fe-based cast superalloy and their effects on the microstructure and mechanical properties were compared to those of a Ni–Fe-based superalloy with the addition of TiC nanoparticles. The addition of TiC nanoparticles led to the precipitation of a higher volume fraction of carbides. Compared to the addition of TiC, the addition of TiC–TiB2 nanoparticles not only led to the precipitation of carbides but also promoted the formation of flaky borides and a reduction in the precipitation of the Laves phase. The strengthening effect of TiC–TiB2 nanoparticles on the mechanical properties of Ni–Fe-based superalloys was stronger than that of TiC nanoparticles due to more secondary γ’ precipitates. This study provides valuable insights for selecting ceramic nanoparticles to increase the mechanical properties of cast Ni–Fe-based superalloys.
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Liu, Haiding, Dongzhe Wang, Linping Zhou, Jia She, and Wei Wu. "Significant Improvement of Strength in Wrought 945A Ni-Based Superalloy by Aging Treatment." Crystals 11, no. 6 (May 31, 2021): 627. http://dx.doi.org/10.3390/cryst11060627.

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Ni-based superalloys have attracted much attention due to their good resistance to high-temperature and -pressure environments. Compared with the traditional 718 Ni-based superalloy, 945A Ni-based superalloy with a lower Ni content showed better performance in terms of precipitated hardening and corrosion resistance. In this study, the aging behavior and the evolution of mechanical properties of the wrought 945A Ni-based superalloy were investigated. Microstructures were analyzed by scanning electron microscopy (SEM), bright field transmission electron microscopy (TEM), high-resolution TEM and high-angle annular dark field scanning TEM. Mechanical properties were measured by tensile and compressive tests. The results illustrated that the compressive yield stress was significantly improved by increasing aging time from 229 to 809 MPa. The increase was greater than 220%. This improvement was mainly attributed to the precipitates of the γ′ phase and carbides during the aging treatment. The residual dislocations generated by the plastic processes stimulated the formation of these precipitates. The precipitation behavior and the strengthening mechanism are discussed in detail.
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Thomson, R. C., K. F. Russell, and M. K. Miller. "Atom Probe Field Ion Microscopy of Model Ni-Al-Be Superalloys." Microscopy and Microanalysis 3, S2 (August 1997): 695–96. http://dx.doi.org/10.1017/s1431927600010369.

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Nickel-based superalloys used in jet engines consist of a face-centred cubic Ni matrix, γ, containing a high density of Ll2-ordered Ni3Al precipitates, γ´. At high temperatures the strength of the alloy depends primarily on the strength of the γ´ phase, which begins to decrease above approximately 750°C, limiting the maximum operating temperature of the superalloy. The possibility of strengthening the γ´ phase by solid-state precipitation within the γ´ phase has been investigated in model Ni-Al superalloys containing Be. Beryllium, a light element, is also expected to be a potent solid solution strengthener in the γ´ matrix.Four alloys were manufactured with compositions Ni-18.8 at. % Al-1.6% Be, Ni-19.0 at. % Al-2.6% Be, Ni-17.9 at. % Al-5.4% Be and Ni-15.9 at. % Al-11.9% Be. These Al levels result in a volume fraction of γ´ phase similar to that present in a commercial superalloy, and the Be addition places the superalloys in the γ-γ´-NiBe region of the ternary phase diagram, Fig. 1.
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Zenk, Christopher H., Nicklas Volz, Carolin Zenk, Peter J. Felfer, and Steffen Neumeier. "Impact of the Co/Ni-Ratio on Microstructure, Thermophysical Properties and Creep Performance of Multi-Component γ′-Strengthened Superalloys." Crystals 10, no. 11 (November 21, 2020): 1058. http://dx.doi.org/10.3390/cryst10111058.

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The Ni content is a crucial factor for the development of γ′-strengthened Co-based superalloys and some studies have systematically addressed its influence on various properties in model superalloys. In this paper, we report for the first time the influence of the Co/Ni ratio in the more advanced nine-component superalloy ERBOCo-1: exchanging Co and Ni in this Co/Ni-based superalloy while keeping the other alloying elements constants has a big influence on a variety of material properties. The elemental segregation after casting is slightly more pronounced in the alloy with higher Ni-content. Microstructural characterization of this alloy termed ERBOCo-1X after heat-treatment reveals that the precipitates are cuboidal in the Co- and spherical in the Ni-rich alloy, indicating a decrease in the γ/γ′ lattice misfit. Analyzing the elemental partitioning behavior by atom probe tomography suggests that the partitioning behavior of W is responsible for that. Furthermore, it is found that even though Ni exhibits the highest overall concentration, the γ matrix phase is still Co-based, because Ni is strongly enriched in the γ′ precipitates. Creep tests at 900 °C reveal that even though the microstructure looks less favorable, the creep resistance of the Ni-rich alloy is slightly superior to the Co-rich variant.
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Santra, Sangeeta. "Phase Stability, Structure and Thermodynamics of Modified Ni- and Fe-Aluminides." Diffusion Foundations 13 (November 2017): 1–55. http://dx.doi.org/10.4028/www.scientific.net/df.13.1.

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The Ni-aluminides are integral constituents of thermal barrier coatings applied over Ni-based superalloys. These aluminides provide oxidation-resistance by forming a protective α–Al2O3surface layer. The Pt-modified β–NiAl bond coat has been developed with an impetus to increase the service-life of Ni-based superalloys. The Pt-modified β–NiAl bond coat significantly improves the oxidation-resistance of superalloys. An interdiffusion zone containing topologically closed packed phases develops at the bond coat/superalloy interface. This eventually leads to Al-lean γ′–Ni3Al transformation, whose oxidation resistance is inferior to that of β–NiAl. The Pt-group metals Ir and Ru delay this transformation and impart creep-resistance to the bond coat. Recent investigations demonstrate that alloying with transition metals such as Cr, Mo and Fe enhance the mechanical strength. The functional stability of bond coat-superalloy assembly counts on the interfacial reaction and associated local structural variations which is a function of bond coat composition. This chapter elucidates the effect of various alloying elements on phase constitutions, crystallographic structural stability and thermodynamics of Ni-and Fe-aluminides to engineer a prospective bond coat.
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Dissertations / Theses on the topic "Ni-based superalloy"

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Singh, Handa Sukhdeep. "Precipitation of Carbides in a Ni-based Superalloy." Thesis, Högskolan Väst, Avd för tillverkningsprocesser, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-6867.

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Alloy B is relatively new precipitation hardening superalloy. It´s applications are in the hot sections of the aero engines, rocket nozzles, gas turbines and in the chemical and petro-leum applications. The alloy is characterized by keeping high strength at elevated tempera-tures and high creep resistance. It´s excellent mechanical properties and corrosion resis-tance are due to the balanced amount of the coherent γ' matrix, combined with other alloy-ing elements and carbides. There are three types of carbides which can be found in nickel-based superalloys: MC, M 23C6 and M6C. Primary MC carbides act as source of carbon for the secondary carbides, which precipitate at the grain boundaries. They can have strengthening effect by hindering the movement of dislocations. In this work both simulation and experimental analysis are conducted in order to investi-gate the behaviour of the secondary carbides. JMatPro simulation is used to predict the behaviour of the material. Heat treatments are conducted at soak temperatures ranging from 920 °C to 1130 °C, with steps of 30 °C, and dwell times of 0.5, 1, 2 and 24 hours. Experimental methods included analysis at LOM, SEM, EDS, manual point counting and hardness tests. Main results show chromium rich M 23C6 carbides are stable at lower temperature compared to molybdenum rich M6C. Both appear as fine and discrete particles at the grain boundaries at 1070 °C. This morphology is believed to be beneficial for the mechanical properties of the alloy. The volume fraction varies between 0.6 and 1.3%. Hardness values are relevant in the range of 920-1010 °C. Above this range there is sudden drop of the hardness
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Sathian, Sujith. "Metallurgical and mechanical properties of Ni-based superalloy friction welds." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0005/MQ46104.pdf.

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Stewart, Calvin. "TERTIARY CREEP DAMAGE MODELING OF A TRANSVERSELY ISOTROPIC NI-BASED SUPERALLOY." Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3606.

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Anisotropic tertiary creep damage formulations have become an increasingly important prediction technique for high temperature components due to drives in the gas turbine industry for increased combustion chamber exit pressures, temperature, and the use of anisotropic materials such as metal matrix composites and directionally-solidified (DS) Ni-base superalloys. Typically, isotropic creep damage formulations are implemented for simple cases involving a uniaxial state of stress; however, these formulations can be further developed for multiaxial states of stress where materials are found to exhibit induced anisotropy. In addition, anisotropic materials necessitate a fully-developed creep strain tensor. This thesis describes the development of a new anisotropic tertiary creep damage formulation implemented in a general-purpose finite element analysis (FEA) software. Creep deformation and rupture tests are conducted on L, T, and 45°-oriented specimen of subject alloy DS GTD-111. Using the Kachanov-Rabotnov isotropic creep damage formulation and the optimization software uSHARP, the damage constants associated with the creep tests are determined. The damage constants, secondary creep, and derived Hill Constants are applied directly into the improved formulation. Comparison between the isotropic and improved anisotropic creep damage formulations demonstrates modeling accuracy. An examination of the off-axis creep strain terms using the improved formulation is conducted. Integration of the isotropic creep damage formulation provides time to failure predictions which are compared with rupture tests. Integration of the improved anisotropic creep damage produces time to failure predictions at intermediate orientations and any state of stress. A parametric study examining various states of stress, and materials orientations is performed to verify the flexibility of the improved formulation. A parametric exercise of the time to failure predictions for various levels of uniaxial stress is conducted.
M.S.M.E.
Department of Mechanical, Materials and Aerospace Engineering;
Engineering and Computer Science
Mechanical Engineering MSME
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Sun, Jifeng. "Time-dependent crack growth in a coarse-grained Ni-based superalloy RR1000." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4082/.

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The dwell fatigue crack growth behaviour of coarse grained RR1000 has been studied using advanced mechanical testing and characterization techniques. Crack growth under sustained loading has also been considered. Environmentally enhanced crack growth at high temperatures in air follows a stress assisted grain boundary oxidation (SAGBO) mechanism, with a 100-300 nm long Al2O3 intrusion ahead of the crack tip. When its thickness of reaches a critical value, this intrusion fails and crack advance ensues. The crack growth process is discontinuous and highly uneven. The dwell fatigue/sustained loading crack growth rates are affected by the stress relaxation ability of the materials, which is related to the size and distribution of tertiary γ' precipitates, testing temperature and stress state. Oxidation damage is deduced to be a dominant factor affecting crack growth over a range of temperature from 600 to 700 °C. At 700 °C oxidation damage begins to have an effect on fatigue crack growth at a dwell time of 30 s. Creep damage is suggested to make the dominant contribution to crack growth at 750 and 775 °C both in air and in vacuum.
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Yang, Xiaoli. "Simulation of stray grain formation in single crystal Ni-based superalloy turbine blades." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424773.

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Kountras, Apostolos 1970. "Metallographic study of gamma - gamma prime structure in the Ni-based superalloy GTD111." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/35753.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2004.
Includes bibliographical references (leaf 73).
The potential for land-based turbine buckets material rejuvenation presents a significant commercial and scientific interest. Ni-based superalloy GTD111 is used at a number of GE-manufactured power generation turbines. The outstanding creep resistance features of Ni-based superalloys can be attributed to a large extent, to the gamma prime ([gamma]') precipitates found within the FCC [gamma]-matrix. Service-induced material degradation mainly involves coarsening and shape transformation of [gamma]'-phase precipitates; therefore, any bucket repair attempt should primarily address the restoration of [gamma]' precipitates to the original configuration. In the present study a quantitative metallographic analysis of GTD111 alloy under different conditions was performed. Several micrographs were taken and analysed using image analysis software. Gamma prime precipitate size was measured and compared between the different alloy conditions, leading to useful conclusions concerning material degradation as a result of high-temperature service exposure. In addition, microstructural transformations observed as a result of different heat treatments, formed the basis for investigation of procedures that can potentially restore the alloy microstructure in the original condition. High temperature solution and aging heat treatments sequence is considered as potentially sufficient for restoring the GTD111 microstructure. Finally, the measurements were examined for correlation with existing [gamma]' particle coarsening theory, by calculating and evaluating the metal service temperature during service. A satisfactory correlation exists.
by Apostolos Kountras.
S.M.
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Edholm, Oscar. "Design of cemented carbide with Ni-based superalloy binder strengthened with y’-Ni3Al precipitates." Thesis, KTH, Materialvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-261137.

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Replacement of cobalt in cemented carbides has gained in attention recently because threats of regulations due to health issues (cancerogenic effect), increased demand from the electric vehicle industry and the questionable extraction from countries like Democratic Republic of Congo. In this report the use of Ni-based binder as an alternative binder for cemented carbides has been explored. The design is based on producing a Ni-based superalloy binder which contains dispersed Ni3Al Gamma Prime (γ’) -phase precipitates in the binder matrix. The investigation focuses on the design of cemented carbide compositions and processes that ensures the formation of γ’- precipitates, the control of their morphology and distribution as well as the effect of heat treatment. To do this a Ni-Al master alloy has been designed that enables the formation of γ’-precipitates in WC-Ni-Al-X systems, produced by conventional powder metallurgy process including standard free sintering. Furthermore, the addition of usual elements in the cemented carbide industry (such as Ti, Cr, Ta, Nb) and their effect on the stability of γ’-precipitates has been investigated. A method to reveal the precipitates including ion-polishing and electro-etching has been developed. Basic mechanical properties such as hardness and toughness have been investigated, revealing particular crack propagation in Ni-based binder reinforced with γ’-precipitates. It was found that the common variables in cemented carbide manufacturing influence all aspects regarding the stability of γ’-phase. By varying the powder type, binder composition and content, the carbon balance, the WC grain size and the heating/cooling steps; the formation of γ’-precipitates (size, morphology, distribution, etc.) can be controlled to tailor the properties of the cemented carbide.
Att hitta en ersättning av kobolt i hårdmetall har nyligen uppmärksammats bl.a. eftersom regleringar hotar användning av ämnet pga. dess cancerogenitet, en ökande efterfrågan från elfordonsindustrin samt den moraliskt tvivelaktiga utvinningen som sker i länder som Demokratiska Republiken Kongo. I denna rapport har användningen av ett nickel-baserat bindemedel som ett alternativt bindemedel för hårdmetaller undersökts. Designen är baserad på att producera en nickel-baserad superlegering som bindemedel som innehåller dispergerad Ni3Al Gamma Prim (γ’) – fas utfälld i bindemedlet. Utredningen fokuserar på designen av hårdmetallskompositioner och processer som försäkrar formationen av γ’-utfällningar, kontroller av dess morfologi, distributionen samt hur värmebehandlingar påverkar. För att kunna göra detta har en Ni-Al masterlegering skapats som möjliggör γ’-utfällningar i ett WC-Ni-Al-X system, producerat med konventionell pulvermetallurgiprocess inkluderat standard fri sintring. Dessutom har tillsatsen av vanliga ämnen i hårdmetallindustrin (such as TI, Cr, Ta, Nb) samt deras effekt på stabiliteten hos γ’-utfällningarna undersökts. En metod för att upptäcka utfällningarna, som inkluderar jonpolering och elektroetsning har utvecklats. Grundläggande mekaniska egenskaper som hårdhet och seghet har undersökts, vilket har avslöjat en speciell sprickutbredning i den nickelbaserade bindaren förstärkt med γ’-utfällningar. Det visade sig att de vanliga variablerna förenade med tillverkning av hårdmetall påverkar samtliga aspekter gällande stabiliteten hos γ’-utfällningar. Genom att variera pulvertyp, bindemedelkomposition och innehåll, kolbalansen, WC-kornstorlek och uppvärmning samt kylningssteg så påverkas bildningen av γ’-utfällningar (storlek, morfologi, distribution, etc..) som kan kontrolleras för att skräddarsy egenskaperna för hårdmetallen.
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Phillips, Patrick J. "Advanced defect characterization via electron microscopy and its application to cyclically deformed Ni-based superalloy R104." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1330915484.

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She, Dawei. "Analysis of Ni and Fe-based Alloys for Turbine Seal Ring Applications." Scholar Commons, 2018. http://scholarcommons.usf.edu/etd/7229.

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Metal sealing rings have been used widely in compressors, turbines and hydraulic devices. Such rings can extend out due to elasticity, and keep close contact with the valve wall, resulting in the formation of a functional seal under pressure. In this project, the failure of metal sealing rings is considered. Sealing component failure due to stress relaxation can threaten the safety of the whole steam turbine. The object of this study was to examine the stress relaxation response and corresponding changes in microstructure of metal sealing rings used in nuclear steam turbine under high temperature and applied stress. The two kinds of sealing ring samples were selected for GH4145 and GH2132. In this paper, all samples were tested by accelerated simulation experiment. The test temperature was controlled at 400℃, 600℃, and 800℃. The 400℃ experiments lasted for 10, 20, 30 and 40 hours, while the 600℃ and 800℃ experiments lasted for 5, 10, 15 and 20 hours. The surface morphology was observed by metallographic analysis. It was found that the two kinds of sealing ring samples presented with a continuous development of grain coarsening and a decrease of the twins when time and test temperature were increased. The prolongation of time and increase of test temperature will drive the grain coarsening and reduce the twins faster. Many precipitates and inclusions were observed on the surface. The composition of precipitation was examined by scanning electron microscopy (SEM). It was further studied by testing samples with applied stress. The differences between the two tests and their influence on mechanical properties are discussed. The grain coarsening and twinning in the alloy will reduce the stress relaxation resistance of the material. Additionally, the precipitates and inclusions in the alloy may adversely affect the stress relaxation performance. Sealing rings using the nickel-based superalloys have stronger anti-stress relaxation performance than sealing rings made of iron-based superalloys.
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Penso, Graciela Carolina. "Welding of X65 Internally Clad with Precipitation Strengthened Ni-Based SUperalloy Filler Metal: Application in Pre-Salt Oil Extraction." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1480600980467914.

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Books on the topic "Ni-based superalloy"

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D, Aggarwal M., and George C. Marshall Space Flight Center., eds. A study of microstructural characteristics of Ni-based superalloys at high temperatures: Final technical report. Normal, Ala: Dept. of Physics, Alabama Agricultural and Mechanical University, 1990.

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C, Wilcox Roy, and United States. National Aeronautics and Space Administration., eds. Determination of cleavage planes and fracture characterization of Ni-based single crystal superalloys: Final progress report. Auburn, AL: Dept. of Mechanical Engineering, Auburn University, 1992.

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D, Aggarwal M., and United States. National Aeronautics and Space Administration, eds. A study of microstructural characteristics of Ni-based superalloys at high temperatures: Semi-annual technical report. Normal, Ala: Dept. of Physics, Alabama Agricultural and Mechanical University, 1987.

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United States. National Aeronautics and Space Administration., ed. A Study of microstructural characteristics of Ni-based superalloys at high temperatures: Semi-annual technical report. Normal, Ala: Dept. of Physics, Alabama Agricultural and Mechanical University, 1988.

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Coakley, James, Mark T. Whittaker, and Stanislav Kolisnychenko. Ni-Based Superalloys. Trans Tech Publications Ltd, 2020. http://dx.doi.org/10.4028/www.scientific.net/978-3-0357-3161-3.

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Coakley, James, Mark T. Whittaker, and Stanislav Kolisnychenko. Ni-Based Superalloys. Trans Tech Publications, Limited, 2020.

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Ni-Based Superalloys. Trans Tech Publications, Limited, 2020.

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National Aeronautics and Space Administration (NASA) Staff. Study of Microstructural Characteristics of ni-Based Superalloys at High Temperatures. Independently Published, 2018.

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National Aeronautics and Space Administration (NASA) Staff. Statistical Analysis of Elevated Temperature Gravimetric Cyclic Oxidation Data of 36 ni- and Co-Base Superalloys Based on an Oxidation Attack Parameter. Independently Published, 2018.

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Book chapters on the topic "Ni-based superalloy"

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Andersson, Joel. "Weldability of Ni-Based Superalloys." In 8th International Symposium on Superalloy 718 and Derivatives, 247–62. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781119016854.ch21.

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Dahl, K. V., J. Hald, and A. Horsewell. "Interdiffusion Between Ni-Based Superalloy and MCrAlY Coating." In Defect and Diffusion Forum, 73–78. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/3-908451-36-1.73.

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Muralidharan, G., Rick Battiste, Edward A. Kenik, James Bentley, and Bruce G. Bunting. "Effect of Microstructure on the High Temperature Fatigue Properties of Two Ni-based Superalloys." In Superalloy 718 and Derivatives, 558–67. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118495223.ch43.

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Mandal, P. K., Akash Kurian Lalu, Amal Michael Saji, and Manu M. Jacob. "Cryogenic Behavior of TIG Welded Ni-Based Superalloy (IN617)." In Lecture Notes in Mechanical Engineering, 207–19. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-4208-2_15.

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Kumar, Manoj, Jyotsna Dutta Majumdar, Hans-Jörg Fecht, and Indranil Manna. "Laser-Assisted Additive Manufacturing of Ni-Based Superalloy Components." In Metallurgy in Space, 499–521. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-89784-0_22.

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Yu, Cheng-Han, Ru Lin Peng, Mattias Calmunger, Vladimir Luzin, Håkan Brodin, and Johan Moverare. "Anisotropic Deformation and Fracture Mechanisms of an Additively Manufactured Ni-Based Superalloy." In Superalloys 2020, 1003–13. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51834-9_98.

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Graverend, Jean-Briac le, Jean-Briac le Graverend, Jean-Briac le Graverend, Jonathan Cormier, Franck Gallemeau, Serge Kruch, and José Mendez. "Anisothermal High-Temperature Cyclic Behavior of a Ni-Based Single Crystal Superalloy." In Superalloys 2016, 647–54. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119075646.ch69.

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Andersson, Joel. "Review of Weldability of Precipitation Hardening Ni- and Fe-Ni-Based Superalloys." In Proceedings of the 9th International Symposium on Superalloy 718 & Derivatives: Energy, Aerospace, and Industrial Applications, 899–916. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-89480-5_60.

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Nishimoto, Takashi, Takuma Okajima, Kenta Yamashita, Qiaofu Zhang, Jiadong Gong, and Greg Olson. "Impact of Coarse γ′ Phase on Recrystallization Modeling in New Ni-Based Superalloy M647." In Superalloys 2020, 482–90. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51834-9_47.

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Okazaki, M., R. Balavenkatesh, S. Yamagishi, and M. Sakaguchi. "Fretting Fatigue Life Extension for Single Crystal Ni-Based Superalloy by Applying Optimized Surface Texturing." In Superalloys 2020, 196–207. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51834-9_19.

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Conference papers on the topic "Ni-based superalloy"

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Ohno, Naoki, Toshio Osada, Chihiro Tabata, Tadaharu Yokokawa, Ayako Ikeda, Kyoko Kawagishi, and Shinsuke Suzuki. "Homogenization During Solution Heat Treatment of Ni-Base Single-Crystal Superalloy TMS-238." In AM-EPRI 2024, 814–20. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0814.

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Abstract To maximize the mechanical properties of Ni-base superalloys, solution heat treatment is essential to sufficiently homogenize the dendritic segregations formed during solidification. To investigate the homogenization behavior during solution heat treatment, a Ni-base single crystal superalloy, TMS-238, was heat treated under various conditions; temperatures ranging from 1573 to 1613 K for times ranging from 2 to 100 h. After solution heat treatment, the average concentrations of Re, an element that exhibits the highest degree of segregation, in dendrite core and inter-dendritic regions were analyzed. From these results, apparent diffusion constants, Dapp, were determined based on a proposed homogenization model. Obtained Dapp values were significantly smaller than the diffusion constant of Re in Ni, strongly suggesting that the apparent diffusion coefficients should be obtained experimentally when using the target alloy.
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Liang, Zhi, Menglei Jiang, Jiadong Gong, and Greg B. Olson. "Innovative Design of Advanced Niobium-Based Alloys for Extreme High-Temperature Applications." In AM-EPRI 2024, 592–99. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0592.

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Abstract The aspiration to deploy Nb-based alloys as viable upgrade for Ni-based superalloys is rooted in their potential for superior performance in high-temperature applications, such as rocket nozzles and next-generation turbines. However, realizing this goal requires overcoming formidable design hurdles, including achieving high specific strength, creep resistance, fatigue, and oxidation resistance at elevated temperatures, while preserving ductility at lower temperatures. Additionally, the requisite for alloy bond-coatings, to ensure compatibility with coating materials, further complicates the design process. QuesTek Innovations has its Integrated Computational Materials Engineering (ICME) technologies to design a superior performance high-temperature Nb-based superalloy based on solid solution and precipitation strengthening. Additionally, utilizing a statistical learning method from very limited available data, QuesTek engineers were able to establish physics-based material property models, enabling accurate predictions of equilibrium phase fraction, DBTT, and creep properties for multicomponent Nb alloys. With the proven Materials by Design methodology under the ICME framework, QuesTek successfully designed a novel Nb superalloy that met the stringent design requirements using its advanced ICMD materials modeling and design platform.
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Peachey, Dominic, Yining He, Pimin Zhang, John Clark, Zara Hussain, Thomas Wagstaff, André Nemeth, and David Crudden. "ABD-1000AM: a Highly Processible Superalloy for Additive Manufacturing, Computationally Designed for 1000°C Applications." In AM-EPRI 2024, 861–72. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0861.

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Abstract The advancement of additive manufacturing (AM) technology has heightened interest in producing components from nickel-based superalloys for high-temperature applications; however, developing high gamma prime (γ’) strengthened alloys suitable for AM at temperatures of 1000°C or higher poses significant challenges due to their “non-weldable” nature. Traditional compositions intended for casting or wrought processes are often unsuitable for AM due to their rapid heating and cooling cycles, leading to performance compromises. This study introduces ABD-1000AM, a novel high gamma prime Ni-based superalloy designed using the Alloys-by-Design computational approach to excel in AM applications at elevated temperatures. Tailored for AM, particularly powder bed fusion, ABD-1000AM demonstrates exceptional processing capability and high-temperature mechanical and environmental performance at 1000°C. The study discusses the alloy design approach, highlighting the optimization of key performance parameters, composition, and process-microstructure-performance relationships to achieve ABD-1000AM’s unique combination of processability and creep resistance. Insights from ABD-1000AM’s development inform future directions for superalloy development in complex AM components.
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Arisue, Ko, Daichi Akama, Yasunari Takeda, and Ryuichi Yamamoto. "The Role of Heat Treatment on Creep Rupture Ductility and its Underlying Metallurgical Mechanism of Forged Ni-based Superalloy." In AM-EPRI 2024, 13–22. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0013.

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Abstract For the safe operation of high temperature equipment, it is necessary to ensure creep rupture ductility of the components from the viewpoint of notch weakening. In this study, the effect of heat treatment conditions on creep rupture ductility was evaluated and its underlying metallurgical mechanism was investigated with using a forged Ni-based superalloy Udimet520. In order to improve the creep rupture ductility without lowering the creep rupture strength, it is important to increase both intragranular strength and intergranular strength in a balanced manner. For this purpose, it was clarified that 1) secondary γ' phase within grains should be kept fine and dense, 2) grain boundaries should be sufficiently covered by M23C6 carbide by increasing its phase fraction, and 3) tertiary γ' phase within grains should be redissolved before the start of creep. To obtain such a precipitate state, it is essential to appropriately select the cooling rate after solution treatment, stabilizing treatment and aging treatment conditions.
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Adam, Benjamin, Robert Turpin, Graham Tewksbury, Rui Feng, Chantal Sudbrack, Mathias Pohl, Karl Jarvis, and Dustin Crandall. "Characterization of Build Parameters and Microstructure in Low Heat Input Wire-Arc Additive Manufacturing of Ni-based Superalloy Haynes 282." In AM-EPRI 2024, 1–12. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.am-epri-2024p0001.

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Abstract Ni-based superalloy Haynes 282 is a prime candidate for advanced power generation systems due to its superior fabricability, weldability, and high-temperature performance. Additive manufacturing offers potential cost and time savings for gas turbine components. Wire-arc direct energy deposition can create large components but often requires post-processing treatments, such as hot isostatic pressing (HIP), to address porosity. This study explores a low heat-input, high deposition rate GMAW process to achieve fully dense Haynes 282 without HIP. Twenty-one blocks were deposited, varying travel and wire feed speeds. Initial analysis (visual inspection, microstructural examination, and CT) revealed the impact of build parameters on internal porosity and defects. Scanning electron microscopy provided insights into structural heterogeneity and microstructural properties.
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Ogata, Takashi, and Takayuki Sakai. "Life Prediction Method of CC and DS Ni Base Superalloys Under High Temperature Biaxial Fatigue Loading." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59069.

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Polycrystalline conventional casting (CC) and directionally solidified (DS) Ni base superalloys are widely used as gas turbine blade materials. It was reported that surface of a gas turbine blade is subjected to biaxial tensile-compressive fatigue loading during start-stop operation based on finite stress analysis results. It is necessary to establish life prediction method of these superalloys under biaxial fatigue loading for reliable operation. In this study, the in-plane biaxial fatigue tests with different phase of x and y directional strain cycles were conducted on both a CC and a DS Ni base superalloys (IN738LC and GTD111DS) at high temperatures. The strain ratio, φ was defined as a ratio between x and y directional strains at 1/4 cycle and was varied from 1 to −1. In φ = 1 and −1, cracks propagated in both x and y directions in the CC supealloy. On the other hand, the main cracks of the DS superalloy propagated only in the x direction indicating failure resistance in the solidified direction is weaker than that in the direction normal to the solidified direction. Although biaxial fatigue life of the CC superalloy was correlated with conventional Mises equivalent strain range, that of DS superalloy was not. New biaxial fatigue life criterion, equivalent normal strain range for the DS superalloy was derived from iso-fatigue life curve on a principal strain plane defined in this study. Fatigue life of the DS superalloy was correlated with the equivalent normal strain range. Fatigue life of the DS superalloy under equi-biaxial fatigue loading was significantly reduced by introducing compressive strain hold dwell. Life prediction under equi-biaxial fatigue loading with the compressive strain hold was successfully made by the nonlinear damage accumulation model indicating that the proposed method can apply to life prediction of gas turbine blades under biaxial fatigue loading.
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Ratay, Jason, and Hitomi Yamaguchi. "Characteristics of Diamond Abrasive Used in Magnetic Abrasive Finishing of Nickel-Based Superalloys." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8365.

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Abstract Nickel-based superalloys have a wide range of high-temperature applications, such as turbine blades. The complex geometries of these applications and the specific properties of the materials raise difficulties in the surface finishing. Magnetic abrasive finishing (MAF) has proven effective in finishing the complex geometries. In MAF, the magnetic properties of the workpiece, tool, and abrasive play important roles in controlling finishing characteristics. This paper presents the effects of nickel coating on the abrasive behavior during finishing and resulting finishing characteristics of Ni-based superalloys. The Ni-coated diamond abrasive is more attracted to the magnet than the Ni-based superalloy surface. As a result, fewer Ni-coated diamond abrasive particles, which are stuck between the magnetic-particle brush and the target surface, participate in surface finishing. Because of this, coupled with the reduced sharpness of abrasive cutting edges due to the coating, Ni-coated diamond abrasive cannot effectively smooth the target surface in MAF. However, the Ni coating is worn off during finishing of the hard, rough, additively manufactured surface. Then, the diamond abrasive participates in finishing as uncoated diamond abrasive and facilitates the material removal, finishing the target surface.
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Qin, Yuan, Shuai Wang, Haitao Wu, Wenchao Zhang, and Sen Yang. "Laser cladding of structured bond coat on Ni-based superalloy." In ICALEO® 2014: 33rd International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2014. http://dx.doi.org/10.2351/1.5063023.

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Krupa, Andrzej, Magdalena Mieloszyk, Tomasz Wandowski, and Maciej Malicki. "3D printed Ni-based superalloy structures for energy industry application." In Health Monitoring of Structural and Biological Systems XV, edited by Paul Fromme and Zhongqing Su. SPIE, 2021. http://dx.doi.org/10.1117/12.2581352.

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Thomas, Marc, Eric Charkaluk, Denis Solas, Fabien Szmytka, Didier Locq, Ariel Morel, Olivier Hubert, Nicolas Muller, and Christophe Tournier. "L-PBF And DED Processing Of A Ni-based Superalloy." In World Powder Metallurgy 2022 Congress & Exhibition. EPMA, 2022. http://dx.doi.org/10.59499/wp225371806.

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Different AM technologies such as PBF-LB and DED do become really attractive for both repair and 3D part manufacturing. In particular, extensive work is in progress for the non weldable nickel-based superalloys which tend to exhibit cracks due to residual stresses build-up during AM thermal cycles. Within the framework of the project FAPS conducted at Paris-Saclay, the present investigation will highlight the processing conditions and build-up strategy that produce crack-free specimens for alloy AD730. The latter was developed by Aubert&Duval for cast+wrought gas turbine applications. In this work, a comparison between such conventional processing and AM will be provided in terms of mechanical performance. The results clearly show an anisotropic behaviour related to the sharp crystallographic texture induced by the epitaxial grain growth. The results will be discussed, with a perspective analysis of maturity for this AM processed-material, the process robustness, the potential technological developments and application prospects.
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Reports on the topic "Ni-based superalloy"

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Sun, Cheng. Degradation mechanism of Ni-based superalloy under extreme irradiation environments. Office of Scientific and Technical Information (OSTI), December 2015. http://dx.doi.org/10.2172/1228073.

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Michael J. Mills. Mechanisms of High Temperature/Low Stress Creep of Ni-Based Superalloy Single Crystals. Office of Scientific and Technical Information (OSTI), March 2009. http://dx.doi.org/10.2172/948728.

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Ma, Longzhou. Identifying and Understanding Environment-Induced Crack propagation Behavior in Ni-based Superalloy INCONEL 617. Office of Scientific and Technical Information (OSTI), November 2012. http://dx.doi.org/10.2172/1060505.

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Srivastava, A., S. Gopagoni, A. Needleman, R. Banerjee, V. Seetharaman, and A. Staroselsky. Effect of Specimen Thickness on the Creep Response of a Ni-Based Single Crystal Superalloy (PREPRINT). Fort Belvoir, VA: Defense Technical Information Center, August 2012. http://dx.doi.org/10.21236/ada565889.

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Viswanathan, G. B., Ken Bain, Dan Huber, S. Jha, S. Sam, J. Tiley, Christopher Woodward, and H. L. Fraser. Analysis of Deformation Substructures in a Notched LCF Sample Under Dwell Condition in a Ni-Based Superalloy (PREPRINT). Fort Belvoir, VA: Defense Technical Information Center, August 2012. http://dx.doi.org/10.21236/ada565960.

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Anderson, Iver, Emma White, Nicolas Argibay, Michael Kirka, and Anand Kulkarni. SCIENCE-BASED ACCELERATION OF THE FULL VALUE STREAM FOR METAL ADDITIVE MANUFACTURING: EXPEDITED POWDER DEVELOPMENT AND ADDITIVE MANUFACTURING DEPLOYMENT IN THE AREAS OF NI-BASE SUPERALLOY AND CUSTOM ALLOY POWDERS FOR AM. Office of Scientific and Technical Information (OSTI), August 2022. http://dx.doi.org/10.2172/2345032.

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White, Emma, Dileep Singh, Michael Kirka, Rajendra Kelkar, and Iver Anderson. SCIENCE-BASED ACCELERATION OF THE FULL VALUE STREAM FOR METAL ADDITIVE MANUFACTURING: EXPEDITED POWDER DEVELOPMENT AND ADDITIVE MANUFACTURING DEPLOYMENT IN THE AREAS OF NI-BASE SUPERALLOY AND CUSTOM ALLOY POWDERS FOR AM. Office of Scientific and Technical Information (OSTI), August 2022. http://dx.doi.org/10.2172/2345029.

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Anderson, Iver, Dileep Singh, Michael Kirka, and James Sears. SCIENCE-BASED ACCELERATION OF THE FULL VALUE STREAM FOR METAL ADDITIVE MANUFACTURING: EXPEDITED POWDER DEVELOPMENT AND ADDITIVE MANUFACTURING DEPLOYMENT IN THE AREAS OF NI-BASE SUPERALLOY AND CUSTOM ALLOY POWDERS FOR AM. Office of Scientific and Technical Information (OSTI), August 2023. http://dx.doi.org/10.2172/1999632.

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De Graef, Marc. Representation and Reconstruction of Three-dimensional Microstructures in Ni-based Superalloys. Fort Belvoir, VA: Defense Technical Information Center, December 2010. http://dx.doi.org/10.21236/ada547559.

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Woodward, Christopher, and James Lill. Ab-Initio Molecular Dynamics Simulations of Molten Ni-Based Superalloys (Preprint). Fort Belvoir, VA: Defense Technical Information Center, October 2011. http://dx.doi.org/10.21236/ada553357.

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