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Academic literature on the topic 'INVAR ALLOY'

Author: Grafiati
Published: 18 August 2021
Last updated: 4 February 2022

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Journal articles on the topic "INVAR ALLOY":

1

NAGAYAMA, Tomio, Takayo YAMAMOTO, and Toshihiro NAKAMURA. "Electrodeposition of Invar Alloy." Journal of the Surface Finishing Society of Japan 67, no. 3 (2016): 140–45. http://dx.doi.org/10.4139/sfj.67.140.

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Higashinakagawa, Emiko, Yasuhisa Ohtake, Michihiko Inaba, and Kouichi Teshima. "New Advances in Invar Alloys. Application of Invar Alloy to CRT Shadow Masks." Materia Japan 36, no. 11 (1997): 1070–74. http://dx.doi.org/10.2320/materia.36.1070.

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Ben Mostefa, L., D. Roptin, and G. Saindrenan. "Surface segregations on Invar alloy." Materials Science and Technology 6, no. 9 (September 1990): 883–91. http://dx.doi.org/10.1179/mst.1990.6.9.883.

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Yang, Cheng Fu, Wei Wen Wang, Hsin Hwa Chen, Wei Tan Sun, Chi Lin Shiau, and Jing Jenn Lin. "Gamma-Ray Radiation-Induced Surface Hydrophobic Effects in Invar Alloy." Advanced Materials Research 482-484 (February 2012): 1585–91. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.1585.

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In this paper, we report a new phenomenon observed in the gamma-ray radiation-induced hydrophobic effects on an Invar surface: When the Invar alloy is subjected to different doses of gamma-ray irradiation, the contact angle increases with the radiation dose. Invar samples with exposed to a higher dose appear more hydrophobic, but this tendency disappears following post-irradiation etching. The contact angles of the irradiated and etched Invar samples can be restored back to a stable value with small deviation after 30 min of annealing at 150°C. X-ray diffraction (XRD) analysis found no crystalline structural changes. High resolution field emission scanning microscope (FE-SEM) analyses showed that irradiation might induce crack-like surfaces which could be removed at higher radiation dose in the following acid etchings. It is believed that the chemical bonds of Invar oxide on the surface were broken by the gamma-ray irradiation, thus raising the likelihood of binding with free ions in the air and resulting in the exclusion of the hydrophilic OH bonds, leaving a hydrophobic post-irradiation Invar surface.
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Qiao, Y. P., Ren Ke Kang, Zhu Ji Jin, and Hang Gao. "The Thermal Characteristics of Invar 36 Alloy during Plane Grinding." Advanced Materials Research 97-101 (March 2010): 918–21. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.918.

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Invar 36 alloy is widely used in the field of precision manufacturing owing to its minimal thermal expansion coefficient. Grinding is very important in Invar surface processing, and the thermal characteristics is a key factor to affect the residual stress and deformation of grinding. In this paper, the thermal characteristics of Invar 36 alloy during plane grinding was tested. The thermal characteristics of Invar 36 alloy was found to be between carbon steel and nickel-based superalloy. The lower grinding temperature and better ground surface with lower residual stress can be obtained by using the reasonable grinding parameters.
6

Zhao, Yue, Ai Ping Wu, Wei Yao, Zhi Min Wang, Yutaka S. Sato, and Hiroyuki Kokawa. "Microstructure and Mechanical Properties of Nd:YAG Laser Welded Invar 36 Alloy." Materials Science Forum 675-677 (February 2011): 739–42. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.739.

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Invar 36 alloy is increasingly used as a structural material for manufacture of liquefied natural gas (LNG) transporters and storage tanks. However, the conventional arc welding of Invar 36 alloy has high susceptibility of hot-cracking. As a high-energy-beam welding process, laser welding could be effective for producing defect-free Invar 36 weld. In the present study, defect-free Invar 36 weld was successfully produced by Nd:YAG laser welding. The microstructure and mechanical properties of weld were also tested.
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Rao, Ziyuan, Dirk Ponge, Fritz Körmann, Yuji Ikeda, Oldřich Schneeweiss, Martin Friák, Jörg Neugebauer, Dierk Raabe, and Zhiming Li. "Invar effects in FeNiCo medium entropy alloys: From an Invar treasure map to alloy design." Intermetallics 111 (August 2019): 106520. http://dx.doi.org/10.1016/j.intermet.2019.106520.

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Grobert, N., M. Mayne, D. R. M. Walton, H. W. Kroto, M. Terrones, R. Kamalakaran, T. Seeger, et al. "Alloy nanowires: Invar inside carbon nanotubes." Chemical Communications, no. 5 (2001): 471–72. http://dx.doi.org/10.1039/b100190f.

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Sui, Qingshuang, Jun He, Xin Zhang, Zhonghua Sun, Yunfei Zhang, Yingfei Wu, Zhixiang Zhu, Qiang Zhang, and Huifen Peng. "Strengthening of the Fe-Ni Invar Alloy Through Chromium." Materials 12, no. 8 (April 20, 2019): 1297. http://dx.doi.org/10.3390/ma12081297.

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Invar alloys with both high strength and low thermal expansion are urgently needed in fields such as overhead power transmission, aero-molds, and so on. In this paper, Cr was introduced as a cost-efficient alloying element into the Fe-36Ni binary invar alloy to increase its mechanical strength. Our results confirmed that fine Cr7C3 precipitants, together with some Fe3C, in the invar alloy aged at 425 °C could be obtained with a short aging time. Those precipitants then grew and aggregated at grain or sub-grain boundaries with an increase in aging time. Simultaneously, mechanical strength and coefficient of thermal expansion (CTE) parabolically varied with the increase in aging time. The sample aged at 425 °C for 7 h presented a maximum strength of 644.4 MPa, together with a minimum coefficient of thermal expansion of 3.30 × 10−6 K−1 in the temperature range of 20–100 °C. This optimized result should be primarily attributed to the precipitation of the nanoscaled Cr7C3.
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Zhilin, A. S., S. V. Grachev, S. M. Nikiforova, M. A. Ryzhkov, N. A. Popov, and V. V. Tokarev. "IMPACT OF COOLING CHARACTER ON STRUCTURE AND CTE OF INVARALLOY WITH 0,6% C." Oil and Gas Studies, no. 6 (December 30, 2015): 74–78. http://dx.doi.org/10.31660/0445-0108-2015-6-74-78.

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The qualitative and quantitative analysis of distribution of structural components (-phase + graphite) in the carbon-containing invar alloy with 0,6% C was conducted. It is demonstrated that velocity of crystallization produces a strong influence on the dispersion of graphite and on the volume fraction of graphite components in the alloy, i.e. at faster cooling the graphite volume fraction and its dispersion are noticeably higher than at slower cooling. The linear thermal expansion coefficient of both slowly cooled and fast cooled alloys maintains its values constant at heating temperatures lower 200 oC. However, in the alloy received as a result of fast cooling this coefficient values are lower than at slow cooling which can be explained by a lower content of carbon in the -phase, being a carrier of invar properties, of the slowly cooled alloy.
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Journal articles

Dissertations / Theses on the topic "INVAR ALLOY":

1

Olovsson, Weine. "Influence of Global Composition and Local Environment on the Spectroscopic and Magnetic Properties of Metallic Alloys." Doctoral thesis, Uppsala University, Department of Physics, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5823.

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Theoretical investigations of spectroscopic and magnetic properties of metallic systems in the bulk, as well as in nanostructured materials, have been performed within the density functional theory. The major part of the present work studies the differences between binding energies of electrons tightly bound to the atoms, the so-called core electrons (in contrast with the valence electrons), that is, core-level binding energy shift (CLS).

By comparison between corresponding elemental core-levels for atoms situated in different chemical environments we obtain fundamental understanding of bonding properties of materials. The method of choice was the complete screening picture, which includes initial and final state effects on the same footing. The usefulness of CLS stems from that it is sensitive to differences in the chemical environment of an atom, which can be affected on one hand by the global composition of e.g. disordered materials, surfaces and interfaces, and on the other hand by the very local environment around an atom. Here CLSs have been obtained for both components in the fcc random alloys AgPd, CuPd, CuNi, CuPt, CuAu, PdAu, NiPd and NiPt. Moreover the model was extended to the Auger kinetic energy shift for the LMM Auger transition in AgPd alloys. Studies were also applied to the near surface and interface regions of PdMn nano structures on Pd(100), thin CuPd and AgPd films on inert Ru(0001), and at interfaces. The disorder broadening on CLS due to local environment effects was calculated in selected alloys.

A part of the thesis concern investigations related to the magnetic ordering in Invar alloys, including the influence of local environment effects. A study was made for the dependence of effective exchange parameter on the electron concentration, volume and local chemical composition.

2

Cottle, Rand Duprez. "Isotropic copper-invar alloys for microelectronics packaging /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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Оссовская, Е. С., and E. S. Ossovskaya. "Разработка технических средств уменьшения температурных погрешностей обработки на высокоскоростных токарных станках : магистерская диссертация." Master's thesis, б. и, 2021. http://hdl.handle.net/10995/103640.

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В начале работы рассматриваются факторы, которые влияют на точность станков, и учитывается роль температурных деформаций для обеспечения точности обработки на металлорежущих станках. Наблюдается, что большое влияние на точность станков оказывают тепловые деформации. После этого познакомились со способами уменьшения температурных деформаций узлов станков, которые используются в данное время, и с техническими средствами их реализации. Рассмотрев существующие системы, мы определили задачу разработки системы термостабилизации с водяным охлаждением электрошпинделя. Для начала мы модернизировали существующую систему термостабилизации шпиндельного узла, в которую включили цепь дифференциала. Потом, обозначив достоинства и целесообразность комбинированного управления, разработали более совершенную систему термостабилизации шпиндельного узла. Далее рассмотрен другой фактор погрешности при обработке – это инструмент, в нашем случае резец для токарной обработки. Для него была разработана система охлаждения с учетом нагрева пластины.
At the beginning of the work, the factors that affect the accuracy of machine tools are considered, and the role of temperature deformations is taken into account to ensure the accuracy of processing on metal-cutting machines. It is observed that thermal deformations have a great influence on the accuracy of machine tools. After that, we got acquainted with the ways to reduce the temperature deformations of machine components that are currently used, and with the technical means of their implementation. Having considered the existing systems, we determined the task of developing a thermal stabilization system with a water-cooled electric spindle. To begin with, we upgraded the existing thermal stabilization system of the spindle assembly, which included a differential circuit. Then, having identified the advantages and expediency of combined control, we developed a more advanced system of thermal stabilization of the spindle assembly. Next, another factor of error in processing is considered – this is a tool, in our case, a cutter for turning. A cooling system was developed for it, taking into account the heating of the plate.
4

Lagarec, Ken. "Resolving the magnetic and structure anomalies in face-centred cubic Fe-Ni alloys, a solution to the Invar and anti-Invar problems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ66162.pdf.

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Lagarec, Ken. "Resolving the magnetic and structure anomalies in face-centred cubic iron-nickel alloys: A solution to the Invar and anti-Invar problems." Thesis, University of Ottawa (Canada), 2001. http://hdl.handle.net/10393/9145.

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We have studied the magnetic and structural properties of synthetic and meteoritic face centred cubic (FCC) Fe-Ni alloys in an effort to understand the underlying mechanisms responsible for the Invar and anti-Invar effects. We have performed a detailed 57Fe Mossbauer spectroscopic and electronic imaging study of the Santa Catharina meteorite, an FCC Fe-Ni meteorite with a bulk composition close to that of Invar (Fe65Ni 35). Its microstructure consists of islands of tetrataenite in a matrix of Fe-rich antitaenite. Using Mossbauer spectroscopy (MS) and electron probe microanalysis (EPMA), we have determined that antitaenite is a low moment alloy with an Fe content of 88 +/- 2 at. %. Antitaenite appears to be stabilized in the FCC phase by its epitaxial relation with tetrataenite. Its Neel temperature is ∼60 K and its isomer shift (IS) is close to that of gamma-Fe. The effect of the magnetic interaction with tetrataenite has been studied by Monte Carlo (MC) simulations and have been shown to be consistent with the anomalous temperature dependence of the width of the antitaenite's Mossbauer spectrum. Using electronic structure calculations (ESCs), we have studied the T = 0 K properties of chemically ordered and disordered FCC Fe-Ni alloys in the ferromagnetic (FM), non-magnetic (NM) and disordered local moment (DLM) states. A significant drop in the IS and in the atomic volume are shown to occur at the transition from the high moment (HM) FM phase to the NM phase which occurs, according to our calculations, at 74.5 at. % Fe. Our calculations of the DLM and FM states show that in Fe-rich Invar alloys, the FM order contributes to stabilizing large moment magnitudes. Our systematic study of the hyperfine fields (HF) by ESCs supports the phenomenological model of Dang and Rancourt (1996a). Calculations on a supercell of Fe11Ni5 show the effects of nearest neighbour (NN) chemical and magnetic environments on the local magnetic moment magnitude and the HF distribution, thereby explaining the main observed features in Fe-rich alloys. Using the IS as a direct probe of the electronic structure, a HM/LM (low moment) transition has been unambiguously observed to occur at ∼70 at. % Fe. Our results have allowed us to conclude that the Invar effect in Fe-Ni is not directly caused by HM/LM admixture or so-called 2-gamma-state like excitations. (Abstract shortened by UMI.)
6

Кульпина, К. А., and K. A. Kulpina. "Исследование износа и стойкости токарных резцов с алмазоподобным покрытием : магистерская диссертация." Master's thesis, б. и, 2021. http://hdl.handle.net/10995/100784.

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Магистерская диссертация выполнена на тему: «Исследование износа и стойкости токарных резцов с алмазоподобным покрытием». Расчётно-пояснительная записка содержит 94 листа, 86 рисунков, 6 таблиц, 23 источника, 1 приложение. Объектом исследования данной работы являются токарные резцы с алмазоподобным покрытием. Цель работы – определить наиболее благоприятные условия работы токарных резцов с алмазоподобным покрытием. В результате выполнения работы были проведены исследования износа алмазоподобного покрытия на токарных резцах, построены и проанализированы графики зависимостей этих износов. Проведен анализ полученных результатов и выдвинута гипотеза об еще одной возможной причине разрушения покрытия, в то время как остальные известные причины устранены. Разработаны конструкции токарных резцов и проведено исследование предлагаемой гипотезы. По результатам исследования проведен расчет прочности и подтверждена предлагаемая гипотеза.
The master's dissertation is carried out on the topic: "Investigation of wear and resistance of cutting tools with a diamond-like coating". The settlement and explanatory note contains 94 sheets, 86 figures, 6 tables, 23 sources, 1 attachment. The object of research in this work is diamond-coated lathe tools. The purpose of the work is to determine the most favorable working conditions for lathe tools with a diamond-like coating. In the course of the work, the study of the wear of the diamond-like coating on lathe tools at various cutting modes was carried out, the graphs of the dependences of these wear in time were built and analyzed. The analysis of the results obtained is carried out and a hypothesis is put forward about another possible cause of the destruction of the coating, while the other known causes have been eliminated. To confirm the hypothesis, the designs of lathe tools were developed and a study was carried out. According to the results of the study, the strength calculation was carried out, the proposed hypothesis was confirmed.
7

Сарварова, Я. Э., and Y. E. Sarvarova. "Исследование износа и стойкости концевых фрез с алмазоподобным покрытием : магистерская диссертация." Master's thesis, б. и, 2021. http://hdl.handle.net/10995/100785.

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Объектом исследования данной работы являются концевые фрезы с алмазоподобным покрытием. Цель работы – определить наиболее благоприятные условия работы концевых фрез с алмазоподобным покрытием. В результате выполнения работы были проведены исследования износа алмазоподобного покрытия на концевых фрезах, построены и проанализированы графики зависимостей этих износов. Проведен анализ полученных результатов и выдвинута гипотеза об еще одной возможной причине разрушения покрытия, в то время как остальные известные причины устранены. Проведено исследование предлагаемой гипотезы. По результатам исследования проведен расчет прочности и подтверждена предлагаемая гипотеза.
The object of research in this work is diamond-coated end-milling cutters. The purpose of the work is to determine the most favorable working conditions for end-milling cutters with a diamond-like coating. In the course of the work, the study of the wear of the diamond-like coating on end-milling cutters at various cutting modes was carried out, the graphs of the dependences of these wear in time were built and analyzed. The analysis of the results obtained is carried out and a hypothesis is put forward about another possible cause of the destruction of the coating, while the other known causes have been eliminated. To confirm the hypothesis a study was carried out. According to the results of the study, the strength calculation was carried out, the proposed hypothesis was confirmed.
8

Ehn, Amanda. "A theoretical study of longitudinal and transverse spin fluctuations in disordered Fe64Ni36 alloys." Thesis, Linköpings universitet, Teoretisk Fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-174085.

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That certain iron and nickel alloys exhibit an anomalously low thermal expansion of a wide temperature range has been observed since late 1800s, and this effect is known as the Invar effect. Since then, many theories have been proposed to explain the phenomenon. While it is generally agreed that the effect is related to magnetism, a full explanation of the effect has yet to be found. One recent theory connected the effect to spin-flips in the iron atoms' magnetic moment and that the probability for a spin-flip to occur depends on the atom's local chemical environment. The aim of this thesis is to perform a theoreticalinvestigation into the magneticenergy landscapes for atomic magnetic moments in different local chemical environments in disordered Fe64Ni36 alloys, and the change in pressure upon populating different parts of the magnetic energy landscape. Constrained calculations are performed to obtain the energy landscapes for both iron and nickel atoms in ferromagnetic Fe64Ni64. The calculated nickel atoms all show one global minimum between 0.64 to 0.72μB. The calculated iron atoms all exhibit two local minima: one where the magnetic moment's direction is the same as the ferromagnetic background's direction and has a size between 2 to 3μB, one where the magnetic moment is flipped and has a reversed direction in regards to the ferromagnetic background with a size between -2.5 to -1.9μB. A weak trend is seen for the energy difference between the two local minima: for iron-atoms with iron-rich local environments the energy difference is smaller than for iron-atoms with nickel-rich local environments. The energy landscapes for a moment rotated with respect to the background show that it is energetically favored to rotate the moment from the spin-up local minimum to the spin-flipped local minimum, rather than shrink in size and then increase in size in the opposite direction. This indicates that the negative local minimum might not be a local minimum, but further calculations are needed to determine if the spin-flipped state is a local minimum or just a saddle point in the complete size-and angle magnetic energy landscape. It is observed that the pressure varies little for different magnetic moment sizes for a nickel atom, but shows a larger variation for different magnetic moment sizes for an iron atom. The pressure difference between the magnetic local minima is about 6-9 kbar, and from thermodynamical simulations a small, nonlinear, decline in pressure with increased temperature is observed.
9

Hidalgo, Garcia Javier. "Development of binder systems based on CAB for powder injection moulding (PIM) and micro powder injection moulding (µ-PIM) of Zircon and Invar powders." Thesis, Besançon, 2014. http://www.theses.fr/2014BESA2043/document.

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Les contributions de cette thèse de doctorat sont focalisées sur les développements de formulations à base de polymères bio sourcés et déliantable à l’eau basés sur l’emploi d’acétate butyrate de cellulose (CAB) et de polyéthylène glycol (PEG). Ces nouvelles formulations ont été appliquées sur différentes nuances de poudres métalliques (invar) et céramiques (zircones). Ces matériaux possèdent une bonne stabilité dimensionnelle sous une large gamme de température imposée et possèdent de très bas coefficients d’expansion thermique.L’objective est l’étude et la compréhension du comportement des liants à base de CAB et PEG quand ils sont utilisés dans les variantes du procédé MIP (étapes de moulage avec ou sans pression, conditions particulières liées à la micro-injection, …) réalisées avec différentes nuances de poudres et différentes granulométries.Les caractéristiques intrinsèques de chaque CAB, leurs interactions avec le PEG et les poudres, l’influence de la nuance de poudre employée, ainsi que la granulométrie et la morphologie des poudres employées ont été étudiées et analysées en fonction du comportement final de la formulation développé et des taux de charges obtenues.L’homogénéité des mélanges développés, leurs taux de charge critique et maximal, ainsi que leurs comportements mécaniques, thermiques et rhéologiques ont été analysés et investigués par différentes études mécaniques, thermo et physico-chimiques. De nouvelles analyses chimiques et physiques ont été introduites par accroitre les connaissances sur les formulations développées. Les formulations optimales ont été validées pour différentes applications et avec l’emploi de différentes variantes du procédé MIP conduisant à l’élaboration de composants et de micro-composants PIM obtenus sans défauts et possédant d’excellentes propriétés fonctionnelles. L’étape de déliantage ainsi que l’étape de densification ont été optimisées en termes de cinétique et d’atmosphère aboutissant aux propriétés physiques et mécaniques escomptées pour l’ensemble des nuances de poudres considérées dans cette étude.En conclusion, les formulations développés des liants basées sur l’emploie de CAB et PEG sont exploitable au niveau de la recherche et au niveau industriel dans le procédé MIP. Elles apportent des améliorations par rapport aux liants conventionnels grâce à un procédé plus écologique. Cette première contribution représente une avancée significative dans l’émergence d’un procédé MIP plus écologique mais d’autres travaux futurs sont encore possibles
This PhD Thesis studied the use of binders based on cellulose acetate butyrate (CAB) andpoly(ethylene glycol) (PEG) in different type of materials, including a ceramic, the zirconiumsilicate, and a metallic alloy, the Invar 36. These materials share their low dimensionalstability with temperature with low coefficients of thermal expansion.The scope of this work is the study and comprehension of the behaviour of the mentionedbinder systems when they are employed in different PIM processes and under differentconditions and powder-types. With regard to this matter, different formulations were designedwith several types of PEG and CAB. These formulations were compared with commercialones. The intrinsic characteristics of each CAB were linked with the behaviour of the differentfeedstock also containing PEG and powder particles. The mixtures homogeneity, the optimumand critical solid loading and its flowability were assessed by torque and capillary rheology.Other complementary techniques such as electronic and light microscopy or the measurementof the mixtures densities by pycnometry were carried out to contrast rheology results. Thecompatibility between the feedstocks’ components and their thermal behaviour were analysedby calorimetry and thermogravimetry techniques. These methods were employed by the firsttime to determine the optimal solid loading.The optimal compositions were injected by using low or high pressures or by a micro injectionmoulding process. The debinding and sintering stages were optimised using severalatmospheres. Finally, the physical and mechanical properties of the final consolidated partswere measured.It could be concluded that the studied binder systems based on PEG and CAB presentedsuitable characteristics for PIM, providing improvements with respect to conventional bindersystems and by a more environmental friendly processing. However, that doctoral work wasjust a first approach to the use of these types of binder systems in PIM. Along this workseveral issues were detected and some topics regarding the processing should be furtherinvestigated to obtain the best of these binder systems
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Chang, Yong-Hsing, and 張永興. "The Study of Infrared brazing Ti50Ni50 SMA and Invar Alloy." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/83588224203517943130.

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碩士
國立臺灣大學
機械工程學研究所
101
Interfacial reactions, microstructural evolution and shear strength of infrared brazed Ti50Ni50 and Invar joint using BAg-8, Cusil-ABA, and Ticusil filler foils have been investigated. All Ag-based fillers well wet the Invar substrate, and their wettability can be further improved by minor Ti addition. The brazed joint using BAg-8 is comprised of Ag-Cu eutectic. There is no interfacial reaction layer between BAg-8 braze and Invar substrate. However, Fe2Ti and Ni3Ti intermetallic compounds are observed close to Ti50Ni50 substrate. Average shear strength of Ti50Ni50/ BAg-8/Invar joint brazed at 850 oC for 300 s is 158 MPa. The joint is fractured along the interface close to Ti50Ni50 substrate, and fractograph is featured with cleavage dominated fracture. For Cusil-ABA and Ticusil brazed joints, the sequence of identified phases from Ti50Ni50 to Invar substrate is CuNiTi, Ag-Cu eutectic and mixture of Fe2Ti and Ni3Ti. The specimen brazed at 850 oC for 300 s using Cusil-ABA filler demonstrates the best average shear strength of 249 MPa. The average shear strength of Ti50Ni50/Ticusil/Invar joint brazed at 900 oC for 60 s is 230 MPa. Cracks are initiated from Fe2Ti phase for both Cusil-ABA and Ticusil brazed joints, and their fractographs are dominated by quasi-cleavage fracture. Two modified approaches of infrared brazed Ti50Ni50 and Invar joints using the Cusil-ABA braze are also investigated. For Cu electroplated Invar substrate, the brazed Ti50Ni50/Cusil- ABA/Cu/Invar joint is comprised of CuNiTi, Ag-rich and Cu-rich phases. For the dual filler foils method, the microstructure of brazed Ti50Ni50/Cusil-ABA/BAg-8/Invar joint is similar to that of Ti50Ni50/Cusil-ABA/Invar joint with shear strength of 212 MPa. Based on the experimental observation, the Cusil-ABA foil shows the potential in brazing Ti50Ni50 and Invar substrates.

Books on the topic "INVAR ALLOY":

1

Wijn, H. P. J., ed. Magnetic Alloys for Technical Applications. Soft Magnetic Alloys, Invar and Elinvar Alloys. Berlin/Heidelberg: Springer-Verlag, 1994. http://dx.doi.org/10.1007/b91565.

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International Symposium on the Invar Effect (1996 Cincinnati, Ohio). The Invar effect: A centennial symposium : proceedings of an International Symposium on the Invar Effect held on the occasion of the 100th anniversary of its discovery ... held in Cincinnati, Ohio, October 7-8, 1996. Warrendale, PA: Minerals, Metals & Materials Society, 1997.

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(Contributor), G. Bertotti, A. R. Ferchmin (Contributor), F. Fiorillo (Contributor), K. Fukamichi (Contributor), S. Kobe (Contributor), and S. Roth (Contributor), eds. Soft Magnetic Alloys, Invar and Elinvar Alloys (Numerical Data & Functional Relationships in Science & Technology). Springer, 1994.

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Gérard, Béranger, ed. The iron-nickel alloys: A hundred years after the discovery of invar--. Andover, UK: Intercept Ltd., 1996.

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5

Invar and Elinvar type amorphous Pe-Cr-B alloys with high corrosion resistance. Washington, D.C: National Aeronautics and Space Administration, 1987.

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C, Russell Kenneth, Smith Darrell F, TMS Ferrous Metallurgy Committee., and Minerals, Metals and Materials Society. Meeting, eds. Physical metallurgy of controlled expansion invar-type alloys: Proceedings of an international conference, sponsored by the TMS Ferrous Metallurgy Committee and held at the TMS Annual Meeting, February 27-March 3, 1989, in Las Vegas, Nevada. Warrendale, Pa: TMS, 1990.

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Book chapters on the topic "INVAR ALLOY":

1

Chen, Cuixin, Baojun Ma, Sainan Miao, and Baoxi Liu. "Effect of Cobalt on Microstructure and Mechanical Properties of Invar Alloy." In Lecture Notes in Mechanical Engineering, 855–64. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0107-0_84.

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Mohanty, Ankita, Rupam Mohapatra, and Supriya Priyadarshini Das. "Optimization of Wire EDM Process Parameters for Machining of INVAR 36 Alloy." In Lecture Notes in Mechanical Engineering, 1–11. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0909-1_1.

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Glezer, A. M., V. V. Rusanenko, V. I. Isotov, V. I. Kopylov, and A. F. Edneral. "Severe Plastic Deformation of Fe-Ni Invar Alloy and Fe-Ni Maraging Steels." In Investigations and Applications of Severe Plastic Deformation, 313–18. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4062-1_40.

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Rodriguez, R. R., J. L. Valenzuela, J. A. Tabares, and G. A. Pérez Alcázar. "Mössbauer and X-ray study of the Fe65Ni35 invar alloy obtained by mechanical alloying." In LACAME 2012, 317–24. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6482-8_38.

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Buschow, K. H. J., and F. R. de Boer. "Invar Alloys." In Physics of Magnetism and Magnetic Materials, 165–70. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/0-306-48408-0_15.

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Ha, Tae Kwon, Kyu Dong Lee, Jin Hwa Song, and Hyo Tae Jeong. "Effect of Aging Treatment Conditions on the Microstructure and Strength of Fe-36Ni Based Invar Alloy." In The Mechanical Behavior of Materials X, 109–12. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-440-5.109.

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Zhilin, A., S. Grachev, M. Ryzhkov, N. Popov, and V. Tokarev. "Structure Formation and Thermal Expansion Analysis of 0.6% Carbon-Containing Invar Alloy Crystallized at Different Cooling Rates." In Advanced Methods and Technologies in Metallurgy in Russia, 27–33. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-66354-8_4.

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Jiang, Xiang, Lijuan Li, Xin Xia, Junjun Huang, and Qijie Zhai. "Influence of Annealing Treatment on Microstructure and Mechanical Properties of Cold-Rolled Sheet of Fe-36Ni Invar Alloy." In Characterization of Minerals, Metals, and Materials, 511–18. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118371305.ch59.

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Wassermann, E. F., and M. Acet. "Invar and Anti-Invar: Magnetovolume Effects in Fe-Based Alloys Revisited." In Magnetism and Structure in Functional Materials, 177–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-31631-0_10.

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Moroni, Elio G., and Thomas Jarlborg. "Modeling of Invar Properties from Electronic Structure Calculations." In Structural and Phase Stability of Alloys, 103–18. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3382-5_7.

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Conference papers on the topic "INVAR ALLOY":

1

Oh, Dong Jin, Jae Myung Lee, and Myung Hyun Kim. "Fatigue Assessment of Thin Welded Joints From Invar Alloy by Local Stress Concept." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23825.

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Abstract:
The aim of this paper is to investigate the fatigue strength of the Invar alloy weld joints. Invar alloy is commonly used in cryogenic applications where a high degree of dimensional stability is required under temperatures. It is widely used in primary and secondary barriers of membrane-type liquified natural gas (LNG) containment system. The fatigue assessment of Invar alloy weld joints is evaluated based on the nominal stress, structural stress approach and effective notch stress approaches. A series of fatigue tests were carried out for two different types of welded joints with raised edge specimens and overlap joint specimens at room and cryogenic temperatures. The evaluation of the results exhibit that the local stress concept using the reference notch radius of r = 0.05 mm can be applied to the fatigue design of Invar alloy weld joints for plates with thicknesses less than 5 mm. The results are also compared with the available published data. Finite Element Analysis (FEA) is carried out to investigate FAT value and slope of the design curve for Invar alloy weld joints. The suggested fatigue design curves based on the effective notch stress concept indicate a lower FAT value compared to steel weld joints by IIW recommendations.
2

Sahoo, Ananya, Maheswari Mohanta, S. K. Parida, Mukul Gupta, V. R. Reddy, Rajeev Rawat, and V. R. R. Medicherla. "Magnetoresistance of Fe-Ni invar alloy and Cu trilayer." In DAE SOLID STATE PHYSICS SYMPOSIUM 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0016678.

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Grobert, N. "Metal and alloy nanowires: Iron and invar inside carbon nanotubes." In ELECTRONIC PROPERTIES OF MOLECULAR NANOSTRUCTURES: XV International Winterschool/Euroconference. AIP, 2001. http://dx.doi.org/10.1063/1.1426872.

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Srivastava, S. K. "Mechanical Properties, Oxidation Resistance and Their Interaction for Two Gas Turbine Seal Ring Alloys." In ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/92-gt-341.

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HAYNES® 242™ alloy is a recently developed Ni-25Mo-8Cr alloy primarily for gas-turbine components requiring a combination of low-thermal expansion and high strength, such as seal rings. INCOLOY® alloy 909 is an iron-base Invar-type alloy used in similar applications. Alloy 909 exhibits substantial advantages over 242 alloy in RT and 650°C (1200°F) - 0.2% yield strength, although at considerable loss of ductility and toughness. In stress-rupture testing over a range of 540°-760°C (1000–1400°F), the 100-hr rupture strengths of alloy 909 are consistently inferior to those of the 242 alloy. This dichotomy in short-time versus long-time tensile properties is likely due to the poor oxidation resistance of alloy 909. Comparative static oxidation and oxidation data concurrent with stress-rupture testing for the two alloys are presented and discussed.
5

Li, Guohe, Changfeng Men, Yujun Cai, and Bing Yan. "Experimental Study and Theory Prediction on Adiabatic Shear of Fe-36Ni Invar Alloy." In 2010 International Conference on E-Product E-Service and E-Entertainment (ICEEE 2010). IEEE, 2010. http://dx.doi.org/10.1109/iceee.2010.5661220.

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Fujii, Hiromichi T., Naoki Sakaguchi, Kotaro Ona, Yutaka Hayano, and Fumihiro Uraguchi. "Precise control of negative thermal expansion in stainless invar type alloy for astronomical telescopes." In Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, edited by Roland Geyl and Ramón Navarro. SPIE, 2020. http://dx.doi.org/10.1117/12.2561193.

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Nadutov, V. M., S. G. Kosintsev, Ye O. Svystunov, V. M. Garamus, R. Willumeit, H. Eckerlebe, T. Ericsson, H. Annersten, Jirí Tucek, and Marcel Miglierini. "Mössbauer and SANS Studies of Anti-Invar Fe-Ni-C Alloy under Magnetic Field." In MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE—2010. AIP, 2010. http://dx.doi.org/10.1063/1.3473897.

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Modal, S. S., S. Roy, and C. K. Sarkar. "Design and electrothermal analysis of MEMS based microheater array for gas sensor using INVAR alloy." In 2012 International Conference on Communications, Devices and Intelligent Systems (CODIS). IEEE, 2012. http://dx.doi.org/10.1109/codis.2012.6422240.

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Ori, Ricardo I., Fumihiro Itoigawa, Shinya Hayakawa, Takashi Nakamura, and Shun-ichiro Tanaka. "Micro-EDM Deposition Alloying Process." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61767.

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A new deposition alloying process using Micro-EDM was developed. Using the energy released by the electrical discharge, material from the tool electrode is melted and deposited over the work surface. When a rotating bi-metal tool electrode is fed towards the work surface, the alloying between its elements occurs during process. The obtained results of the alloying between nickel and iron are presented in the present paper, when the components of the bi-metal tool electrode are made of YNi-1 (nickel alloy used in TIG welding — JIS standard) and medium carbon steel (S45C — JIS standard). X-ray and EDS analysis have shown that the chemical composition of the obtained deposit can be controlled and is proportional to the cross sectional area of each element present in the bi-metal electrode. With this process, a material with the same composition of Invar was successfully deposited.
10

Park, Jeong-Yeol, and Myung-Hyun Kim. "A Suggested Shaping Exponent in Wheeler Approach Under Overload Condition for High Manganese Steel." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18646.

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Abstract Recently, International Maritime Organization (IMO) reinforced the regulations for nitrogen oxide (NOx) and sulfur oxides (SOx) toward the reduced emission. To avoid serious environmental issues, the need for liquefied natural gas (LNG) fuel tanks arose for new constructed vessels. LNG fuel tanks are typically fabricated with low temperature materials that exhibit excellent fatigue performance at cryogenic temperature. In manufacturing of LNG fuel tanks, high manganese steel is known to be cost effective compared to other low temperature materials such as 9 wt.% nickel alloy steel, SUS304L and INVAR alloy. Therefore, extensive efforts are carried out to investigate the fatigue performance of high manganese steel. However, such investigations are yet limited to the constant amplitude load case only. In order to reflect loading or unloading condition of LNG vessels in terms of fatigue performance, this study investigates the fatigue crack growth characteristics of high manganese steel under overload condition. The main parameters considered are the overload ratio (OLR) and the mean stress. We employ the Wheeler approach for the estimation of fatigue crack growth characteristics. In general, the Wheeler approach consists of crack length, plastic zone size and shaping exponent. Among three parameters in Wheeler approach, we assess the relationship between OLR and shaping exponent and suggest a modified equation for the shaping exponent considering the mean stress effect. In order to predict the effect of overload, the estimated fatigue life based on the Wheeler approach with the modified equation was compared to that with a constant amplitude load.

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