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Effect of solution temperature on fracture toughness and microstructure of ultra-purified 18Ni(350) maraging steel
He, Y; Liu, K; Yang, K
Corresponding AuthorHe, Y()
2003-04-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume39Issue:4Pages:381-386
AbstractVariation of fracture toughness (K-IC) of an ultra-purified 18Ni (350) maraging steel in the solution temperature range of 1083-1483 K was investigated, and its mechanism was discussed on the base of TEM examination of microstructure in both solution and aging conditions, along with phase transformation and SEM fractographic analysis. The results show that the value of. KIC consistently increases with increasing solution temperature or coarsening of prior austenite grain, and there is no thermal embrittlement resulted from segregation of Ti(C,N) at high solution temperature. Solution treated maraging steel consists of invariable martensite lathes. In aging process, the segregation of precipitates Ni-3 (Mo,Ti) at the prior austenite grain boundaries and lath boundaries becomes more and more serious with the increase of solution temperature or coarsening of prior austenite grain, which leads to the martensite matrix softening and the reverted austenite forms because of enrichment of Ni and Mo at the prior austenite grain boundaries and lath boundaries. The softening matrix and reverted austenite blunt the crack tip and prevent its propagation, so the maraging steel shows a dimpled transgranular fracture and good toughness after high temperature solution treatment.
Keywordmaraging steel solution temperature fracture toughness reverted austenite precipitate segregation ultra-purified melting
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000182921300010
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/117764
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,Liu, K,Yang, K. Effect of solution temperature on fracture toughness and microstructure of ultra-purified 18Ni(350) maraging steel[J]. ACTA METALLURGICA SINICA,2003,39(4):381-386.
APA He, Y,Liu, K,&Yang, K.(2003).Effect of solution temperature on fracture toughness and microstructure of ultra-purified 18Ni(350) maraging steel.ACTA METALLURGICA SINICA,39(4),381-386.
MLA He, Y,et al."Effect of solution temperature on fracture toughness and microstructure of ultra-purified 18Ni(350) maraging steel".ACTA METALLURGICA SINICA 39.4(2003):381-386.
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