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Mechanical properties of ultra-high-strength 18Ni cobalt-free maraging steel
He, Y; Yang, K; Kong, FY; Qu, WS; Su, GY
Corresponding AuthorHe, Y()
2002-03-18
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume38Issue:3Pages:278-282
AbstractThe influence of heat treatment on the microstructure and mechanical properties of a 2000 MPa grade Co-free 18Ni maraging steel has been investigated, and the strengthening and toughening mechanisms were discussed. The experimental results show that the hardness of the steel in solution condition is independent of both the solution temperature and the time. A combination of high strength and good toughness can be reached under the peak-aged condition, where the ultimate strength is over 2100 MPa, and the elongation and K-Ic are 9% and 70 MPa(.)m(1/2), respectively. The TEM observation revealed that a great deal of nanometer size precipitates, such as Ni-3(Mo, Ti), is distributed in a high density dislocation matrix of the steel treated with peak-aged condition, which realizes a better match of strength and toughness. The precipitation strengthening in the present steel obeys the modified Orowan mechanism.
Keyword18Ni Co-free maraging steel precipitation strengthening mechanical property
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000174931400012
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/115194
Collection中国科学院金属研究所
Corresponding AuthorHe, Y
AffiliationChinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
He, Y,Yang, K,Kong, FY,et al. Mechanical properties of ultra-high-strength 18Ni cobalt-free maraging steel[J]. ACTA METALLURGICA SINICA,2002,38(3):278-282.
APA He, Y,Yang, K,Kong, FY,Qu, WS,&Su, GY.(2002).Mechanical properties of ultra-high-strength 18Ni cobalt-free maraging steel.ACTA METALLURGICA SINICA,38(3),278-282.
MLA He, Y,et al."Mechanical properties of ultra-high-strength 18Ni cobalt-free maraging steel".ACTA METALLURGICA SINICA 38.3(2002):278-282.
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