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Maraging steel

About: Maraging steel is a research topic. Over the lifetime, 1728 publications have been published within this topic receiving 19886 citations. The topic is also known as: martensitic ageing steel.


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01 Jan 1965
TL;DR: In this article, the fine-scale microstructures of the 18Ni(250) and 18Ni (300) grades of maraging steel have been examined using electron microscopy of thin foils and extraction replicas in conjunction with electron-diffraction and electron-probe analyses of particles extracted from these steels.
Abstract: : The fine-scale microstructures of the 18Ni(250) and 18Ni(300) grades of maraging steel have been examined using electron microscopy of thin foils and extraction replicas in conjunction with electron-diffraction and electron-probe analyses of particles extracted from these steels. The microstructure of both steels in the annealed condition consists of small, equiaxed martensite grains containing a high dislocation density but few microtwins. The main source of the strengthening that occurs in these steels during aging is the precipitation of extremely fine particles of intermetallic compounds. The major precipitate, Ni3Mo, appears to nucleate on dislocations, and during the early stages of aging it occurs in the form of ribbons or rods. A second precipitate, which nucleates homogeneously, appears as small spheres in the early stage of aging. The identity of this precipitate is not certain, but indirect evidence suggests that it is Ni3Ti. Upon continued aging, both types of precipitates assume the form of platelets or discs. The softening that occurs in these steels upon overaging is believed to result from the rapid growth of reverted austenite plates and the resolution of precipitate particles in the vicinity of the austenite plates. (Author)

5 citations

Journal Article
TL;DR: The main strengthening ways of 18Ni maraging steel, such as solution strengthening, transformation strengthening, aging strengthening, fine grain strengthening, deformation strengthening, are included in the review as mentioned in this paper.
Abstract: 18Ni maraging steel is a kind of high strength steel strengthened by ageing precipitation hardening of intermetallics in carbon-free or extre-low carbon ferronickel martensite matrix.The main strengthening ways of 18Ni maraging steel,such as solution strengthening,transformation strengthening,aging strengthening,fine grain strengthening,deformation strengthening,are include in the review.The development trend of 18Ni maraging steel are also presented.

5 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of the method of remelting and of heat treatment modes on the behavior of serial curves of impact toughness and on the position of cold-shortness threshold in steel 08Kh15N5D2T are presented.
Abstract: Results of a study of the effect of the method of remelting and of heat treatment modes on the behavior of serial curves of impact toughness and on the position of cold-shortness threshold in steel 08Kh15N5D2T are presented.

5 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the influence of reversion austenite on the notch sensitivity of Ni maraging steel and found that the influence was very small and that the increase in the fatigue strength was large near the fatigue limit.
Abstract: Rotating bending fatigue tests were carried out for 18% Ni maraging steel in order to investigate the influence of reversion austenite on notch sensitivity of maraging steel. Fatigue strength was increased by formation of reversion austenite. The increase in the fatigue strength was large near the fatigue limit. In the range of notch radius ρ larger than 0.05 mm, fatigue limit was determined by the limit for crack initiation in the material without reversion austenite, whereas a non-propagating crack was observed in only the notched specimen of ρ=0.05 mm in the material formed reversion austenite. These were caused by suppressions of the crack initiation and its early propagation due to formation of reversion austenite. However, the influence of reversion austenite on notch sensitivity was very small.

5 citations

Journal ArticleDOI
01 Oct 1993-JOM
TL;DR: The use of electrical discharge machining (EDM), or spark erosion as it is sometimes called, introduces hydrogen into maraging steel 250 such that brittle fracture surfaces result from embrittlement accelerated by slowstrain-rate tensile tests.
Abstract: The use of electrical discharge machining (EDM), or spark erosion as it is sometimes called, introduces hydrogen into maraging steel 250 such that brittle fracture surfaces result from embrittlement accelerated by slow-strain-rate tensile tests. Brittle fracture features indicate potential premature failure due to hydrogen embrittlement. Experimental control was provided by test specimens machined by abrasive waterjet, a machining technique that does not evolve hydrogen as a part of the machining process. Hydrogen concentration measurements indicate the hydrogen concentration of specimens fabricated by EDM is approximately 0.5 ppm, while that of specimens machined by abrasive waterjet is approximately 0.1 ppm. On the basis of constant-load tests, the time to failure of test specimens machined by EDM and loaded to 50% of the yield strength is estimated to be a minimum of 30 years.

5 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023101
2022177
2021119
202089
201993
201874