Relevant bibliographies by topics / Maraging Steels

Contents

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

Academic literature on the topic 'Maraging Steels'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 September 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Maraging Steels.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Maraging Steels"

1

Kumar, Nikhil, C. M. Ramesha, T. Anilkumar, P. Rajendra, and B. R. Chandan. "Comparative Studies on Medium Carbon Low Alloy Steels and Maraging Steels." Applied Mechanics and Materials 903 (April 2021): 17–26. http://dx.doi.org/10.4028/www.scientific.net/amm.903.17.

Full text
Abstract:
The maraging steel are considered ultra-high strength due to its yield strength greater than 1400Mpa and are part of a set of advanced materials of interest for technological development, mainly for aeronautics and aerospace industry. For this purpose they should exhibit good toughness, fatigue resistance and acceptable weldability. Since the maraging steels are of higher cost we are intended to make the Medium Carbon Low Alloy Steel (MCLA) for the purpose of aeronautical and aerospace industry instead of Maraging steel as the cost of MCLA is comparatively less. An attempt is made to study on the basic properties of MCLA steels and Maraging steels by process modifications and comparing the results with that of the standard properties of the Maraging steel.
APA, Harvard, Vancouver, ISO, and other styles
2

Kumar, Ashok, Y. Balaji, and N. Eswara Prasad. "Type Certification of 18 Ni Maraging Steels for Landing Gears." Materials Science Forum 710 (January 2012): 511–15. http://dx.doi.org/10.4028/www.scientific.net/msf.710.511.

Full text
Abstract:
Maraging steels exhibit unique properties, such as high strength with excellent fracture toughness, ease of machining and above all distortion free thermal processing. These attractive properties and advantages of maraging steel do not outweigh the initial cost resulting from high alloy content and especially in certain structural components where in much of the forging is machined as swarf. However, with the constant drive to prove the technology when maximum strength and stiffness per unit volume becomes the major criteria, the choice of material may overwhelmingly become maraging steel. Above requirements necessiate a landing gear material for Indian fighter aircraft to have a combination of high strength, sufficient stiffness, excellent fatigue strength, utmost cleanliness, resistance to micro-structural degradation, freedom from surface anomalies, good corrosion & stress corrosion resistance and superior toughness to meet the current damage tolerant design criteria. M/s Midhani in consultation with airworthiness authorities took up the task to develop & manufacture this steel to the laid down type test schedule. The steel has satisfactorily met all the requirements and landing gear has been successfully forged, machined and fitted to the prototype. This paper describes the metallurgical aspects that are relevant for developing the maraging steel along with a brief note on the properties - chemical, microstructural and mechanical. An attempt is made in the presentation to show that the indigenously developed and produced maraging steel is indeed at par with aeronautical grade materials, including maraging steels of international sources.
APA, Harvard, Vancouver, ISO, and other styles
3

Mahmood Khan, Hamaid, Gökhan Özer, Mustafa Safa Yilmaz, and Gürkan Tarakci. "Improvement of Corrosion Resistance of Maraging Steel Manufactured by Selective Laser Melting Through Intercritical Heat Treatment." Corrosion 78, no. 3 (January 9, 2022): 239–48. http://dx.doi.org/10.5006/3972.

Full text
Abstract:
Selective laser melting allows the layerwise fabrication of bespoke designs, creating new prospects in applications and properties compared to conventional methods. Like other ultra-high-strength steels, maraging steels offer a high toughness/strength ratio. However, additively prepared maraging steels’ lower ductility and strain-hardening limit their commercial adaptability. Studies exist that show superior mechanical performance is attainable through martensite-to-austenite reversion. However, their impact on corrosion properties is not well understood. In the present study, maraging steel specimens were tempered close to austenite forming temperatures to investigate the reversed austenite effect on maraging steels’ pitting behavior. X-ray diffraction, scanning electron microscopy, and energy-dispersive x-ray spectroscopy were used to characterize selective laser melting samples’ microstructure. To characterize and analyze the pitting performance, potentiodynamic polarization and open-circuit potential were performed in a 3.5 wt% NaCl solution. The intercritical heat-treatment within α’ + γ range of 720°C shows that reversed austenite precipitated mainly along the martensite laths boundaries. The local Ni enrichment as a result of intermetallic particles’ dissolution enables the nucleation of reversed austenite. As a result, the 720°C-tempered specimen exhibits a higher pitting potential, lower corrosion current density, and lower corrosion rate than the as-printed, aged, and homogenized (without reversed austenite) specimens. This study shows that the reversed austenite enhances the pitting resistance of maraging steels.
APA, Harvard, Vancouver, ISO, and other styles
4

Jagadish, C. A., and Nadig Priyanka. "Effect of Cryogenic Treatment on the Mechanical Properties of 18Ni-300 Grade Maraging Steel Built Using the Direct Metal Laser Sintering (DMLS) Technology." Key Engineering Materials 719 (November 2016): 114–21. http://dx.doi.org/10.4028/www.scientific.net/kem.719.114.

Full text
Abstract:
Maraging steels belong to the class of steels that are found to have a unique combination of ultra-high strength and good fracture toughness, due to which they find uses in critical applications such as aircraft forgings, pressure vessels, missile casings, hydraulic hoses etc. Several studies on the effect of cryogenic treatment on various grades of Tool steels & Maraging steels have shown significant improvements in mechanical properties and dimensional stability.DMLS (Direct Metal Laser Sintering), an additive manufacturing technology, is increasingly becoming popular to build intricate high quality functional parts & rapid prototypes. DMLS technology uses a high intensity laser to build components layer by layer, directly from CAD data without the need for tooling. It is possible to build internal features and passages that are not possible in conventional manufacturing routes. Maraging Steel is used extensively to build functional parts by DMLS process especially for Tool and Die applications. However, very few findings have been reported on the effect of cryogenic treatment on the mechanical properties of Maraging steel built through this route. In this study, effect of cryogenic treatment on Maraging Steel grade 300 built by DMLS process is discussed. Test specimens were built in horizontal and vertical directions to see the effect of build direction on the properties. Half the specimens were given standard DMLS precipitation hardening heat treatment and the rest were given cryogenic treatment in addition to routine thermal treatment. Mechanical properties such as - tensile, impact properties , hardness, & density between the two sets of treatments are reported and discussed. Metallurgical structures are compared and findings are also reported.
APA, Harvard, Vancouver, ISO, and other styles
5

de Carvalho, Leandro Gomes, Ronald Lesley Plaut, and Angelo Fernando Padilha. "Precipitation Kinetic Analysis in a Maraging 350 Steel Using KJMA and Austin-Rickett Equations." Defect and Diffusion Forum 420 (November 14, 2022): 118–28. http://dx.doi.org/10.4028/p-luf4h8.

Full text
Abstract:
Maraging steels are martensitic steels hardened by intermetallic compounds that precipitate during aging heat treatments. During aging of these steels complex phenomena involving nucleation and growth of several phases as well as changes in the precipitates, morphology and stoichiometry take place. The present work aims to study the kinetics of precipitation in a maraging 350 steel through the KJMA and Austin-Rickett (AR) equations. Analysed data were obtained from Vickers microhardness measurements carried out in samples heat-treated between 440 and 560 °C. Variation in the n-constant has been observed for both equations, indicating changes in the precipitation behavior. However, the n-constant values obtained from AR equation follow the microstructural changes observed in previous works on maraging steels. Interpretation of the n-constants using the AR equation was linked to the precipitation on dislocations at 440 °C, the growth of finite long cylinders in comparison to their separation at 480 °C, and general particle growth from small dimensions at 520, and 560 °C.
APA, Harvard, Vancouver, ISO, and other styles
6

Lombardo, Sandro, Renan Nascimento Ferreira, Lucas Augusto de Souza Santos, José Wilson de Jesus Silva, Vladimir Henrique Bagio Scheid, and Antonio Jorge Abdalla. "Microstructural Characterization of Joints of Maraging 300 Steel Welded by Laser and Subjected to Plasma Nitriding Treatment." Materials Science Forum 869 (August 2016): 479–83. http://dx.doi.org/10.4028/www.scientific.net/msf.869.479.

Full text
Abstract:
Amongst the ultra high strength steels, the maraging steels have been noticed because they maintain the fracture toughness superior to other steels of their class. The main difference is the way they acquire resistance. While the conventional carbon steels raise their resistance by heat treatments forming harder phases such as martensite or bainitic constituents, the maraging steels harden by intermetallic particles precipitation. These steels are very promising for several applications, mainly for the aerospace or nuclear areas. In this work, tests of laser welding on a sample of maraging 300 steel, have been carried out, by applying aging at several times and temperatures and analyzing the influence of plasma treatment on the steel microstructure and resistance. The results are promising and show that this welding process is viable and can even be associated with nitriding to improve the surface characteristics. It was observed that the temperature choice and aging time are fundamental to reach high mechanical resistance levels. Temperature values about 480 oC and time 10,800 seconds proved to be suitable for this treatment. The loss of strength in the welded joints, after the aging treatment, was less than 10%. It was also noticed that when the plasma nitriding treatment is applied, aging occurs simultaneously, therefore it is important to select temperature and treatment time in order to optimized the aging process as well.
APA, Harvard, Vancouver, ISO, and other styles
7

Seikh, Asiful H., Hossam Halfa, and Mahmoud S. Soliman. "Effect of Molybdenum Content on the Corrosion and Microstructure of Low-Ni, Co-Free Maraging Steels." Metals 11, no. 6 (May 21, 2021): 852. http://dx.doi.org/10.3390/met11060852.

Full text
Abstract:
Molybdenum (Mo) is an important alloying element in maraging steels. In this study, we altered the Mo concentration during the production of four cobalt-free maraging steels using an electroslag refining process. The microstructure of the four forged maraging steels was evaluated to examine phase contents by optical microscopy, scanning electron microscopy (SEM), and X-ray diffraction (XRD) analysis. Additionally, we assessed the corrosion resistance of the newly developed alloys in 3.5% NaCl solution and 1 M H2SO4 solution through potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. Furthermore, we performed SEM and energy-dispersive spectroscopy (EDS) analysis after corrosion to assess changes in microstructure and Raman spectroscopy to identify the presence of phases on the electrode surface. The microstructural analysis shows that the formation of retained austenite increases with increasing Mo concentrations. It is found from corrosion study that increasing Mo concentration up to 4.6% increased the corrosion resistance of the steel. However, further increase in Mo concentration reduces the corrosion resistance.
APA, Harvard, Vancouver, ISO, and other styles
8

Grachev, S. V., and A. S. Shein. "High-strength maraging steels." Metal Science and Heat Treatment 31, no. 4 (April 1989): 237–43. http://dx.doi.org/10.1007/bf00715794.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Neuman, I., S. F. Dirnfeld, and I. Minkoff. "Microstructure of resistance spot welding of maraging steels." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 4 (August 1990): 900–901. http://dx.doi.org/10.1017/s0424820100177635.

Full text
Abstract:
Experimental work on the spot welding of Maraging Steels revealed a surprisingly low level of strength - both in the as welded and in aged conditions. This appeared unusual since in the welding of these materials by other welding processes (TIG,MIG) the strength level is almost that of the base material. The maraging steel C250 investigated had the composition: 18wt%Ni, 8wt%Co, 5wt%Mo and additions of Al and Ti. It has a nominal tensile strength of 250 KSI. The heat treated structure of maraging steel is lath martensite the final high strength is reached by aging treatment at 485°C for 3-4 hours. During the aging process precipitation takes place of Ni3Mo and Ni3Ti and an ordered solid solution containing Co is formed.Three types of spot welding cycles were investigated: multi-pulse current cycle, bi-pulse cycle and single pulsle cycle. TIG welded samples were also tested for comparison.The microstructure investigations were carried out by SEM and EDS as well as by fractography. For multicycle spot welded maraging C250 (without aging), the dendrites start from the fusion line towards the nugget centre with an epitaxial growth region of various widths, as seen in Figure 1.
APA, Harvard, Vancouver, ISO, and other styles
10

Koniorczyk, Piotr, Mateusz Zieliński, Judyta Sienkiewicz, Janusz Zmywaczyk, and Andrzej Dębski. "Experimental Studies of Thermophysical Properties and Microstructure of X37CrMoV5-1 Hot-Work Tool Steel and Maraging 350 Steel." Materials 16, no. 3 (January 31, 2023): 1206. http://dx.doi.org/10.3390/ma16031206.

Full text
Abstract:
Measurements of thermal diffusivity, heat capacity and thermal expansion of X37CrMoV5-1 (1.2343) hot-work tool steel and Maraging 350 (1.6355) steel in the temperature range from −50 °C to 1000 °C were carried out in this paper. Both X37CrMoV5-1 and Maraging 350 are tested for military use as barrel steels. Thermophysical properties were tested using specialised test stands from NETZSCH. Thermal diffusivity was studied using both the LFA 427 laser flash apparatus in the temperature range of RT–1000 °C and the LFA 467 laser flash apparatus in the temperature range of −50 °C–500 °C. Specific heat capacity was investigated using a DSC 404 F1 Pegasus differential scanning calorimeter in the range RT–1000 °C, and thermal expansion was investigated using both a DIL 402 Expedis pushrod dilatometer in the range −50 °C–500 °C and a DIL 402 C in the range RT–1000 °C. Inconel 600 was selected as the reference material during the thermal diffusivity test using LFA467. Tests under the light microscope (LM), scanning electron microscopy (SEM) and Vickers microhardness measurements were carried out to detect changes in the microstructure before and after thermophysical measurements. This paper briefly characterises the research procedures used. In conclusion, the results of testing the thermophysical properties of X37CrMoV5-1 hot-work tool steel and Maraging 350 steel are compared with our results on 38HMJ (1.8509), 30HN2MFA and Duplex (1.4462) barrel steels. The thermophysical properties of X37CrMoV5-1 (1.2343) hot-work tool steel and Maraging 350 (1.6355) steel are incomplete in the literature. The paper presents the thermophysical properties of these steels over a wide range of temperatures so that they can be used as input data for numerical simulations of heat transfer in cannon barrels.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Maraging Steels"

1

El-Mahallawi, I. S. E. D. "Maraging steels for cast tooling." Thesis, University of Leeds, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375352.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Sha, W. "Atom probe studies of phase transformations in maraging steels." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302899.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Pan, Xin. "Development of lean maraging steels for ultra high strength applications." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/20511/.

Full text
Abstract:
Lean maraging steels were designed for several application sectors by providing very high strength and ductility, with the addition of relatively cheaper elements like manganese. In this work, the microstructural and mechanical properties of four niobium-containing (0.035 wt. %) and vanadium-containing (0.02 wt. %) Fe-7Mn-2Ni-1Ti-1Mo-0.03C (in wt. %) with different content of aluminium (1~2 wt. %) aged at different temperatures between 420 °C and 570 °C were investigated. As-quenched Fe-7Mn alloys exhibited a good combination of high strength (~700 MPa of 0.2 proof strength, ~ 850 MPa of UTS) and ductility (~ 10 % tensile elongation). The as-quenched microstructure consisted of lath martensite and a small amount (~ 0.3 vol. %) of micronsized (Ti, Mo, Nb/V)C carbides. The aging process significantly strengthened/hardened the Fe-7Mn alloys which is due to the formation of nano-sized Nix(Ti, Mn, Al) precipitates. Nix(Ti, Mn, Al) precipitates exhibit a very high number density (52.9×1014/m2 in the peak-aged state of Alloy 2, aged at 500 °C for 24 h) and fine size (average diameter was 17.4 ± 4.2 nm after aged at 500 °C for 168 h). The Vickers hardness increased with aging time in the under-aged stage which was due to the precipitate growth and the alloy was strengthened by Orowan bypassing mechanism. The hardness decreased with aging time after the peak hardness as the precipitate coarsened. There were two types of the crystal structure observed for Nix(Ti, Mn, Al) precipitates: The L21-Ni2(Ti, Mn, Al) phase (lattice parameter, a = 0.5863 ~ 0.5895 nm, which is co-planar with martensite matrix, with only 1.72 % of lattice misfit. And the L12-Ni3(Ti, Mn, Al) structure ( a = 0.3598 ~ 0.3613 nm). A short time-aging resulted in a yield strength above 1 GPa but led to embrittlement of Fe-7Mn alloys, which was believed to be due to the segregation of Mn to the grain boundaries. Both carbides and nano-precipitates formed along grain boundaries were likely to reduce the cohesion across the boundary plane, as well as resulted in stress-strain incompatibilities. However, the prolonged aging resulted in the formation of reverted austenite (RA) in the over-aged stage, which led to the recovery of ductility when aged at 570 °C as the austenite reversion removed the Mn solute from the grain boundaries. Reverted austenite exhibited lath-like shape with the length between 50 and 2000 nm. Both the size and volume fraction of RA increased with the increasing aging time and aging temperature. RA was formed with the diffusion-controlled mechanism, and it was observed exhibiting a Kurdjumov-Sachs (K-S) orientation relationship with the neighbouring aged martensite grains with an enrichment of Mn and Ni. Higher content of Al addition resulted in ~ 25 vol. % of δ-ferrite in the as-quenched microstructure, which was stable during aging. 2 wt. % of Al also resulted in higher volume fraction of nano-precipitates and increased the dissolution temperature of precipitates, however, it delayed the peak-aging time and austenite reversion. Nb-containing alloys exhibited relatively finer size of prior austenite grains and (Ti, Mo, V)C carbides, larger size and higher number density of Ni(Ti, Mn, Al) precipitates, but slightly lower austenite fraction, compared to V-containing alloys. Based on the results, it is suggested that Alloy 3 aged at 570 °C for 2~6 h gives the optimized mechanical properties.
APA, Harvard, Vancouver, ISO, and other styles
4

VICTOR, OLAVO B. dos S. "Contribuicao ao estudo da cinetica do envelhecimento de acos 'maraging'." reponame:Repositório Institucional do IPEN, 1990. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10230.

Full text
Abstract:
Made available in DSpace on 2014-10-09T12:36:18Z (GMT). No. of bitstreams: 0
Made available in DSpace on 2014-10-09T13:59:18Z (GMT). No. of bitstreams: 1 03981.pdf: 3648582 bytes, checksum: 289e3f8da88b110ea883c9749d9e35bc (MD5)
Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
APA, Harvard, Vancouver, ISO, and other styles
5

Qian, Feng. "Microstructural evolution of Mn-based maraging steels and their influences on mechanical properties." Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/9459/.

Full text
Abstract:
A set of Mn-based maraging TRIP steels was designed by Max-Planck-Institut für Eisenforschung GmbH (MPIE) for light weight and safe automotive applications. According to their research, these Mn-based maraging TRIP steels exhibited a simultaneous increase in both strength and ductility upon aging. They attributed this surprising effect to the combination of precipitation strengthening mechanism and TRIP effect of reverted/retained austenite. This thesis carried out a further study on this type of steels with minor modification of chemical composition (7-12 wt.% Mn, with additional ~ 1 wt.% Al). The unknown precipitates were characterized as L21-ordered Ni2TiAl intermetallic phase for the first time. This type of precipitates is not only coherent but also coplanar with the martensite matrix. Their special orientation relationship together with the small lattice misfit (1.24%) led to the precipitates remaining coherent with the martensite matrix even after a long-term aging for 10080 min. Analyses on precipitate size revealed that the coarsening rate constants follows the diffusion-controlled coarsening kinetics form r ̅^3~Kt predicted by LSW theory, but the experimental precipitate size distributions (PSDs) is much broader than the theoretical PSD function. In addition, a core/shell structure was observed within the precipitates, but the exact structure of this structure is still not clear. The formation of reverted austenite nanolayers initiated at the onset of aging by a diffusionless shear mechanism since the critical Mn concentration for austenite reversion at the interface is very low. The accumulated Mn segregation at grain boundaries in the following aging led to the austenite nanolayers that grew to lath-like reverted austenite, which means the lateral growth of austenite was supported by the diffusion of Mn. Due to the low diffusion rate of Mn and the thermodynamic resistance to coalescence, the growth rate of lath-like reverted austenite is slow and thus the austenite maintained in the range 70-200 nm for a long time. The segregation of Ti and Mo on grain boundaries in the initial aging stage resulted in the Mn concentration of austenite nanolayers being far from that indicated by the equilibrium Fe-Mn phase diagram. The segregation of Ti and Mo gradually vanished with the enrichment of Mn during the succeeding aging process. The TEM-EDS analyses revealed the Mn concentration of lath-like austenite was at the level of ~24 at.% which is higher than that of retained austenite (8-12 at.%) reported in conventional Mn-based TRIP or Q&P steels. Nanoindentation testing revealed that the high stability of reverted austenite in Mn-based maraging steels was mainly attributed to the high Mn concentration of austenite. The nano-size of reverted austenite was also considered to be responsible for the high stability. Severe embrittlement occurred in samples aged at lower temperatures or for short times. Increasing aging temperatures and duration can significantly improve the embrittlement phenomena. An ultimate tensile strength (UTS) of 1120 MPa with total elongation (TE) of 18.4% was obtained in the 12% Mn alloy by aging at 500 °C for 5760 min. It was demonstrated that the dense precipitates contributed to the increase in yield strength whereas the work hardening of reverted austenite contributed to the enhanced strength and ductility after yielding. The TRIP effect of reverted austenite reported by Raabe et al. does not occur to any significant amount owing to the high stability of reverted austenite in Mn-based maraging steels.
APA, Harvard, Vancouver, ISO, and other styles
6

Santos, Luis Paulo MourÃo dos. "AvaliaÃÃo da fragilizaÃÃo por hidrogÃnio no aÃo maraging 300." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12599.

Full text
Abstract:
CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior
Os aÃos maraging sÃo ligas de ultra-alta resistÃncia com vasta aplicaÃÃo na engenharia, desde vasos de alta pressÃo de operaÃÃo em processos crÃticos, componentes aeronÃuticos, aplicaÃÃes militares atà equipamentos esportivos. O presente trabalho buscou avaliar os efeitos da fragilizaÃÃo por hidrogÃnio no aÃo maraging 18% Ni da classe 300, nas condiÃÃes solubilizada e envelhecida. As amostras foram solubilizadas a 1093 Â10K por 3,6 ks, seguido de um resfriamento ao ar e envelhecidas a 753 e 843 Â10K por 10,8 ks, respectivamente e resfriadas ao ar. Foi realizada uma caracterizaÃÃo microestrutural por difraÃÃo de raios-X, correntes parasitas, medidas de dureza Rockwell e microscopia eletrÃnica e Ãptica. Para avaliar os efeitos do ingresso de hidrogÃnio nas propriedades mecÃnicas do aÃo maraging 18% Ni da classe 300 foram realizados ensaios de traÃÃo com baixa taxa de deformaÃÃo (BTD). A taxa de deformaÃÃo aplicada foi 1,0 x 10-6 s-1. Os ensaios foram realizados ao ar (meio inerte) e em soluÃÃo de 3,5% NaCl sob o potencial catÃdico de -1,2 VECS. Foi observada uma reduÃÃo de 11,06 para 3,89% no alongamento e de 61,28 para 10% na reduÃÃo de Ãrea para as amostras solubilizadas. As amostras envelhecidas a 753 Â10K por 10.8 ks apresentaram maior reduÃÃo nessas propriedades. Nesta condiÃÃo a reduÃÃo observada foi de 1929,26 MPa para amostras ensaiadas ao ar para 447,64 MPa para amostras ensaiadas em soluÃÃo de 3,5% NaCl sob potencial catÃdico no limite de resistÃncia e de 7,30 para 1,62 % no alongamento. As amostras envelhecidas a 843 Â10K, as quais apresentaram de cerca de 10% de austenita sofreram fragilizaÃÃo similar as amostras envelhecidas a 753 Â10K. Trincas secundÃrias perpendiculares a carga aplicada foram observadas nas amostras solubilizadas e ensaiadas em soluÃÃo de 3,5% NaCl sob potencial catÃdico. Os resultados indicam que a presenÃa de precipitados e de austenita revertida impedem a propagaÃÃo de trincas secundÃrias na seÃÃo longitudinal nas condiÃÃes envelhecidas. A anÃlise da superfÃcie de fratura revelou caracterÃstica de uma fratura dÃctil nas amostras ensaiadas ao ar com dimples de diferentes tamanhos e profundidades, enquanto que nas amostras ensaiadas em soluÃÃo de 3,5% NaCl sob potencial catÃdico foram observadas trincas induzidas pelo hidrogÃnio e microcavidades e regiÃes de quase-clivagem para todas as condiÃÃes estudadas.
Maraging steels are ultra high strength alloys widely used in engineering applications from high pressure vessels operating in critical processes, aircraft components, military applications to sports equipment. This work assessed the effects of hydrogen embrittlement in 18% Ni maraging grade 300 steel in the solution annealed and aged conditions. Samples were solution annealed at 1093 Â10K for 3.6 ks, followed by air cooling and aging at 753 and 843 Â10K for 10.8 ks, respectively, and cooled by air. The microstructure was characterized by X-ray diffraction, eddy current, hardness measurement and optical and electron microscopy. To assess the effects of hydrogen ingress on the mechanical properties of 18% Ni maraging grade 300 steel, slow strain rate tests (SSRT) were performed. A strain rate of 1.0x10-6 s-1 was applied. The tests were carried out in air (middle inert) and the samples immersed in the electrolyte at a simultaneous potential of -1.2 VSEC. The results showed the reduction elongation from 11.06 to 3.89% and from 61,28 to 10% in reduction of area for samples in the solution annealed condition. The greatest reductions were observed in the samples aged at 753 Â10K for 10.8 ks. In this condition the reduction from 1929.26 MPa in air tests to 447.64 MPa in ultimate tensile strength and from 7.30 to 1.62% in elongation under cathodic polarization in the 3,5% NaCl solution was observed. The samples aged at 843 Â10K for 10.8 ks, where about 10% of reverted austenite was identified, showed evidence of hydrogen embrittlement as seen in the samples treated at different conditions. Secondary cracks, perpendicular to the loading direction at the longitudinal surface of the solution annealed fractured samples immersed in 3,5% NaCl solution under cathodic potential were seen. The results evidence that the precipitates and reverted austenite difficult secondary crack propagation in longitudinal section on aged samples. Scanning electron examination showed a change in fractografic features from ductile dimples to quasi-cleavage and microvoid modes when comparing samples without (air tested) and with hydrogen ingress.
APA, Harvard, Vancouver, ISO, and other styles
7

PADIAL, ARMANDO G. F. "Transformacoes de fase e propriedades mecanicas de um aco maraging sem cobalto." reponame:Repositório Institucional do IPEN, 1994. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10381.

Full text
Abstract:
Made available in DSpace on 2014-10-09T12:38:01Z (GMT). No. of bitstreams: 0
Made available in DSpace on 2014-10-09T14:04:39Z (GMT). No. of bitstreams: 1 05580.pdf: 5974833 bytes, checksum: 186f4c952bed8c2c1e8b6f248587bbfc (MD5)
Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
APA, Harvard, Vancouver, ISO, and other styles
8

Johansson, Kenny. "Process and microstructure development of a LPBF produced maraging steel." Thesis, Karlstads universitet, Avdelningen för maskin- och materialteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-79004.

Full text
Abstract:
Additive manufacturing (AM) has the possibility of producing complex-shaped components which can not be produced by conventional manufacturing methods. This gives the opportunity for designers to freely think outside the design spectra which is otherwise limited by conventional manufacturing methods. AM of metal has rapidly been developed for the last three decades, and they now are reaching industrial acceptance levels, metal feedstock for use in AM is also rapidly growing. AM of metals is especially of interest for the tooling industry. The design freedom which AM offers the tooling manufacturer can design complex cooling channels within moulds, which could reduce cycle time and enhance the quality of components produced with the moulds. Maraging steels have been proven to both be able to be processed with AM but also have comparable performance to traditionally carbon-based used tool steels. Laser Powder Bed Fusion (LPBF) is one of the most promising AM systems today, by using powder as a feedstock it can produce high-resolution parts without needing to process them after they have been produced. However, there is a need to better understand processing within the LPBF system. This master thesis is aimed to process a newly developed maraging steel from Uddeholm, and conduct process parameter experiment and study their correlation to be able to produce samples with as few defects possible. It is crucial to conform to a good methodology for how to find those correlations and see how they influence the printed material. LPBF process has a multi-complex variable system, and by narrowing down the complexity by focus on the most influencing parameters as has been proven by many researchers. Even with a reduced focus, it is still a multi-variable problem. In this study a methodology of finding process parameters relations, a Design Of Experiment software was used, namely, MODDE. By screening of process parameter ranges, within the software, a statistical evaluation of operational process window can be found with fewer conducted experiment. Development of process parameter can traditionally be time-consuming and result in an unnecessary large number of experiments to find the operational window. The experiment showed that laser power and point distance had the most influencing effect on relative density, followed by exposure time and hatch distance. The experiment was firstly conducted with a layer thickness of 50 µm, the achieved relative density resulted in over 99.8 percent. However, a large lack of fusion defects was observed inside the specimens. Even though a high relative density was measured, a pore analysis has to be conducted to fully understand the size and shape of defects since they can have a severe impact on mechanical properties. It was believed that the layer thickness was too high and that the defects could be reduced by printing a set with same process parameters but with a lower layer thickness of 40 µm instead. The reduction of layer thickness did result in a significant decrease of the defects observed. However, future work after this thesis must be continued to further optimize and to increase the solidity of printed material to reach closer to its conventional produced relatives
Additiv tillverkning har möjligheten att producera komplext konstruerade komponenter som inte kan produceras med konventionella tillverkningsmetoder. Detta ger konstruktörer möjligheten att fritt tänka utanför designspektra som annars begränsas av konventionella tillverkningsmetoder. Additiv tillverkning av metall har snabbt utvecklats under de senaste tre decennierna och har nu nått industriella acceptansnivåer. Metallråvara för användning i additiv tillverkning växer snabbt. Additiv tillverkning av metaller är särskilt intressant för verktygsindustrin, designfriheten som additiv tillverkning kan erbjuda verktygstillverkaren för att kunna utforma komplexa kylkanaler inuti formar. Det kan således reducera cykeltiden och förbättra kvaliteten på komponenter som produceras med formarna. Maråldringsststål har visat sig att både kunna processas i additiv tillverkning och har jämförbara egenskaper med traditionellt kolbaserade verktygsstål. Pulverbäddsystemet är ett av de mest lovande systemen idag, genom att använda pulver som råmaterial kan systemet producera komponenter med hög noggranhet utan att behöva bearbeta dem efter att processen är klar. Det finns emellertid ett behov av att bättre förstå själva processen inom pulverbädds teknologin. Den här masteruppsatsen syftar till att additivt tillverka ett nyutvecklat maråldringsstål från Uddeholm. Samt att genomföra processparameterexperiment och studera deras korrelation för att kunna producera prover med så få defekter som möjligt. Det är avgörande att hitta en metod för hur man hittar korrelationerna och se hur de påverkar det tillverkade materialet. Pulverbäddsystemet har ett multikomplext variabelsystem. För att minska komplexiteten kan fokus läggas på de mest inflytelserika processparametrarna, vilket har bevisats av många forskare. Även med ett reducerat fokus är det fortfarande ett flervariabelsproblem. I denna studie användes en metod för att hitta relationer mellan processparametrar och en Design Of Experiment-programvara, nämligen MODDE. Genom screening av processparametrar, inom programvaran, kan en statistisk utvärdering av operativt processfönster hittas med färre genomförda experiment. Utvecklingen av processparametrar kan traditionellt vara tidskrävande och resultera i ett onödigt stort antal experiment för att hitta det operativa fönstret av processparametrar. Experimentet visade att lasereffekt och punktavstånd påverkande den relativa densiteten mest, följt av exponeringstiden och spåravståndet. Experimentet genomfördes först med en lagertjocklek av 50 mikrometer, lagertjockleken resulterade i en relativ densitet på över 99,8 procent. Emellertid observerades stora fusionsdefekter inuti proverna. Även om en hög relativ densitet mättes, måste en poranalys genomföras för att fullt ut förstå storleken och formen på defekter eftersom de kan ha en avgörande inverkan på mekaniska egenskaperna. Det misstänktes att lagertjockleken var för hög och att defekterna kunde minskas genom att tillverka en ytterligare uppsättning av samma processparametrar men med en lägre lagertjocklek på 40 mikrometer istället. Minskningen av lagertjockleken resulterade i en signifikant minskning av de observerade defekterna. Framgent efter den här avhandlingen måste dock arbetet fortsätta att ytterligare optimera och öka soliditeten i det additivt tillverkade materialet. Det för att uppnå bättre prover och komma ännu närmre det konventionellt tillverkade materialets egenskaper.
APA, Harvard, Vancouver, ISO, and other styles
9

Gentil, Johannes Axel. "Surface Modification of Superaustenitic and Maraging Stainless Steels by Low-Temperature Gas-Phase Carburization." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1228456491.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Kottman, Michael Andrew. "Additive Manufacturing of Maraging 250 Steels for the Rejuvenation and Repurposing of Die Casting Tooling." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1416854466.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Maraging Steels"

1

Zhanli, Guo, ed. Maraging steels: Modelling of microstructure, properties and applications. Boca Raton: CRC Press, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Wigley, D. A. Machining-induced deformation in stepped specimens of PH 13-8 Mo, 18 nickel maraging steel grade 200TI and grain-refined HP 9-4-20 [microform]. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Wigley, D. A. Machining-induced deformation in stepped specimens of PH 13-8 Mo, 18 nickel maraging steel grade 200TI and grain-refined HP 9-4-20 [microform]. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

G, Sandefur Paul, Young Clarence P, and Langley Research Center, eds. Braze alloy process and strength characterization studies for 18 nickel grade 200 maraging steel with application to wind tunnel models. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Sha, Wei, and Zhanli Guo. Maraging steels. Woodhead Publishing Limited, 2009. http://dx.doi.org/10.1533/9781845696931.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Maraging steels: Recent developments and applications : proceedings of a symposium. Warrendale, Pa: The Society, 1988.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Guo, Z., and W. Sha. Maraging Steels: Modelling of Microstructure, Properties and Applications. Elsevier Science & Technology, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Wilson, Richard K. Maraging Steels Recent Developments and Applications Proceedings of Symposium Tms Meeting 1-1988. Tms, 1989.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Maraging Steels"

1

Sha, Wei. "Low Nickel Maraging Steel." In Steels, 163–87. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-4872-2_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Sha, Wei. "Ultra High-Strength Maraging Steel." In Steels, 141–61. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-4872-2_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Ponge, Dirk, Julio MiUán, and Dierk Raabe. "Design of Lean Maraging TRIP Steels." In Advanced Steels, 199–208. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17665-4_21.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Grum, Janez, and Martin Zupančič. "Non-Homogenous Precipitation Annealing of Maraging Steels." In Materials Science Forum, 469–74. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-969-5.469.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Tarata, D. F., D. D. Cealicu, and G. Vaduvoiu. "Research Regarding Hot Wear Resistance of MARAGING Steels." In Friction, Wear and Wear Protection, 750–56. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527628513.ch99.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

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.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Potekhin, B. A., A. S. Khristolyubov, and A. Yu Zhilyakov. "Tribological Properties of Composite Bronzes Reinforced with Dendrites from Maraging and Stainless Steels." In Lecture Notes in Mechanical Engineering, 1214–20. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-54814-8_140.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Banas, G., F. V. Lawrence, J. M. Rigsbee, and H. E. Elsayed-Ali. "Laser Shock Hardening of Welded Maraging Steel." In Surface Engineering, 280–90. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0773-7_29.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Antretter, T., F. D. Fischer, U. Cihak, K. Tanaka, G. Cailletaud, P. Fratzl, and B. Ortner. "Transformation Induced Plasticity (Trip) in a Maraging Steel." In Solid Mechanics and Its Applications, 87–94. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-0069-6_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Devendranath Ramkumar, K., G. Gopi, Ravi Prasad Valluri, K. Sampath Kumar, Trilochana Jena, and M. Nageswara Rao. "Environment-Induced Degradation in Maraging Steel Grade 18Ni1700." In TMS 2018 147th Annual Meeting & Exhibition Supplemental Proceedings, 521–28. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72526-0_49.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Maraging Steels"

1

Fernandes de Lima, Milton Sergio. "IN-SITU AGED LASER WELDED MARAGING STEELS." In COBEF 2019. ABCM, 2019. http://dx.doi.org/10.26678/abcm.cobef2019.cof2019-0080.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Andersson, M., K. Stiller, and M. Hattestrand. "The Influence of Silicon on the Precipitation Process in Maraging Stainless Steels." In 2006 19th International Vacuum Nanoelectronics Conference. IEEE, 2006. http://dx.doi.org/10.1109/ivnc.2006.335384.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Viana, Angélica Alves, Savio Lopes Rabelo, José Daniel de Alencar Santos, Venceslau Xavier de Lima Filho, Douglas De Araújo Rodrigues, Roberto Fernandes Ivo, and Pedro Pedrosa Rebouças Filho. "Automatic Evaluation of the Mechanical Properties of Steels Maraging using Digital Image Processing Techniques." In Conference on Graphics, Patterns and Images. Sociedade Brasileira de Computação, 2020. http://dx.doi.org/10.5753/sibgrapi.est.2020.13014.

Full text
Abstract:
Some strategic sectors of the economy require that the raw material of their machines and equipment have mechanical properties that satisfy their use. Maraging steel is a material of great concern since it is necessary to have a high mechanical resistance associated with high fracture toughness. The traditional tests to determine the fracture toughness of this material before use in applications are the Charpy and KIC tests. However, this process is characterized by being exhaustive and requiring specialized and trained professionals. Thus, to reverse this situation, this work proposes a new approach to determine the mechanical properties of maraging steel. For this, initially, the method removes any artifacts present in the image resulting from the mode of acquisition. In sequence, this works tested the method Extended Minimum Transformation (EMT) and mathematical morphology to find these markers of the regions of the dimples. Then, the Adaptive Thresholding, Optimal Global Thresholdusing the Otsu Method and Watershed transformation methods were used to segment the dimples. In the end, the diameter of the dimples and the toughness of the material were calculated. Tests are carried out and compared with the result obtained by specialists using the traditional system to evaluate the proposed approach. The results obtained were satisfactory for the application because the proposed approach presented speed and precision to the conventional methods.
APA, Harvard, Vancouver, ISO, and other styles
4

Lardon, J. M., and T. Poulain. "Advanced High Strength Martensitic Stainless Steels for High Pressure Equipment." In ASME 2018 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/pvp2018-84546.

Full text
Abstract:
Maraging stainless steels offer a large panel of high strength materials with good ductility and stress corrosion cracking resistance. Their mechanical properties compared to conventional 15-5 PH and 17-4 PH martensitic stainless steels show much better yield strength / toughness compromise for yield strength exceeding 1300 MPa. In the same time, fatigue resistance is significantly increased at high strength stress levels and material keeps good resistance to stress corrosion. These properties make them particularly suitable for ultra-high pressure equipment or high pressure rotating components submitted to high cyclic stresses. Their application for Pascalisation pressure vessels and ultra-high pressure compressors for ethylene gas is briefly presented.
APA, Harvard, Vancouver, ISO, and other styles
5

Mescheryakov, Yu I. "Comparative Analysis of Uniaxial Strain Shock Tests and Taylor Tests for Armor and Maraging Steels." In SHOCK COMPRESSION OF CONDENSED MATTER - 2003: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP, 2004. http://dx.doi.org/10.1063/1.1780310.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

de Souza Martins Cardoso, Andréia, Antonio Jorge Abdalla, Milton Sergio Fernandes de Lima, Felipe Martins Bonjorni, Miguel Justino Ribeiro Barboza, Carlos Antonio Reis Pereira Baptista, and Leonardo Fanton. "Study of Laser Welding and Heat Treatments Done in Different High Strength Steels: 4340, 300M, Maraging 300." In 22nd SAE Brasil International Congress and Display. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2013. http://dx.doi.org/10.4271/2013-36-0510.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Wang, Yucong. "Effects of PVD Coatings on Thermal Fatigue Resistance of Hot-Work Tool Steels." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0682.

Full text
Abstract:
Abstract Physical vapor deposit (PVD) coatings have been used to extend die-casting die life, mainly by reducing molten metal’s corrosion and erosion to the dies. The dies are made of hot-work tool steels. Among the tested PVD coatings, CrN and TiAlN coatings provided the longest die life because of their higher oxidation resistance temperatures. Die insert life can be extended three to eight times based on the in-plant tests. However, the thermal fatigue resistance of hot-work tool steels was affected differently by the PVD coatings. The research work in this area is very limited. This paper discusses the results from a systematic study involving three H series and two maraging hot-work tool steels with and without TiN, TiAlN or CrN PVD coating, in terms of thermal cycling induced fatigue (heat checking) resistance, hardness and fracture toughness changes, as well as molten aluminum corrosion resistance. Based on the results, a die life extension approach is proposed to reduce die-casting operation cost and improve casting quality.
APA, Harvard, Vancouver, ISO, and other styles
8

Fukuyama, Seiji, Masaaki Imade, and Kiyoshi Yokogawa. "Hydrogen Environment Embrittlement of Steels and Alloys In 70 MPa Hydrogen at Room Temperature." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15214.

Full text
Abstract:
Hydrogen environment embrittlement (HEE) of steels and alloys to be used in high-pressure hydrogen storage for fuel cell vehicles was investigated in 70 MPa hydrogen at room temperature. Candidate materials for high-pressure hydrogen storage, namely, stainless steels (i.e., SUS304; in the Japanese Industrial Standard (JIS), SUS316, SUS316L, SUS316LN, SUS310S, SUS630(17-4PH)), a low-alloy steel (SCM440), carbon steels (SUY, S15C, S35C, S55C and S80C), an iron-based superalloy (SUH660(A286)), Ni-based superalloys (Incoloy 800H, Inconel 718, Inconel 750, Hastelloy B2, Hastelloy C22), a copper-zinc alloy (C3771) and an aluminum alloy (A6061), were tested. SWP (piano wire), and SUS304, SUS316 and SUS631(17-7PH) wires used for springs were also tested. Tensile tests were conducted at room temperature using specially designed apparatus developed by our laboratory to measure the actual load on a specimen with an external load cell irrespective of the axial load caused by the high pressure and friction at sliding seals. In materials that contain Ni, i.e., stainless steels, and iron-based and Ni-based superalloys, HEE shows a variable Ni content dependence. We found that the effect of Ni equivalent on HEE of these materials shows a stronger dependence. HEE decreases with increasing Ni equivalent with grain boundary fracture or transgranular fracture along a martensite lath assisted by hydrogen for SUS630, SUS304, SUS316, SUS316LN and SUS316L. No HEE is observed in the given Ni equivalent range with dimple fracture for SUH660, SUS310S and Incoloy 800H; however, HEE increases with increasing Ni equivalent with transgranular fracture along a slip plane, that is along the interface between austenite and gamma', and with grain boundary fracture assisted by hydrogen for Inconel 718, Inconel 750, Hastelloy C22 and Hastelloy B2. These results and other HEE test results in high-pressure hydrogen obtained by AIST, i.e., results for 18 Ni maraging steel, low-alloy steels, high-Cr steels, Ni-based superalloys; are summarized in the AIST HEE data, which is compatible with NASA HEE data. HEE of the materials in high-pressure hydrogen is discussed. Internal reversible hydrogen embrittlement (IRHE) of some thermally hydrogen-charged austenitic stainless steels is also discussed in comparison with HEE of the steels.
APA, Harvard, Vancouver, ISO, and other styles
9

Lucon, Enrico, Chris N. McCowan, and Raymond L. Santoyo. "Overview of NIST Activities on Sub-Size and Miniaturized Charpy Specimens: Correlations With Full-Size Specimens and Verification Specimens for Small-Scale Pendulum Machines." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45159.

Full text
Abstract:
NIST in Boulder Colorado investigated the correlations between impact test results obtained from standard, full-size Charpy specimens (CVN) and specimens with reduced thickness (sub-size Charpy specimens, SCVN) or reduced or scaled cross-section dimensions (miniaturized Charpy specimens, MCVN). A database of instrumented impact test results was generated from four line pipe steels, two quenched and tempered alloy steels, and an 18 Ni maraging steel. Correlations between specimen types were established and compared with previously published relationships, considering absorbed energy, ductile-to-brittle transition temperature, and upper shelf energy. Acceptable correlations were found for the different parameters, even though the uncertainty of predictions appears exacerbated by the expected significant experimental scatter. Furthermore, we report on the development of MCVN specimens for the indirect verification of small-scale pendulum machines (with potential energies between 15 J and 50 J), which cannot be verified with full-size verification specimens. Small-scale pendulum machines can now be verified at room temperature with certified reference specimens of KLST type (3 mm × 4 mm × 27 mm), supplied by NIST at three certified absorbed energy levels (low energy, 1.59 J; high-energy, 5.64 J; super-high energy, 10.05 J). These specimens can also be used to verify the performance of instrumented Charpy strikers through certified maximum force values. Certified reference values for both absorbed energy and maximum force were established by means of an interlaboratory comparison (Round-Robin), which involved nine qualified and experienced international laboratories.
APA, Harvard, Vancouver, ISO, and other styles
10

Viana, N. F., and H. F. G. de Abreu. "CRYSTALLOGRAPHY OF MARAGING STEEL: INFLUENCE OF VARIANT SELECTION." In International Symposium on Crystallography. São Paulo: Editora Edgard Blücher, 2015. http://dx.doi.org/10.5151/phypro-sic100-089.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Maraging Steels' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography