| Effect of solution temperature on fracture toughness and microstructure of ultra-purified 18Ni(350) maraging steel | |
| He, Y; Liu, K; Yang, K | |
| Corresponding Author | He, Y() |
| 2003-04-11 | |
| Source Publication | ACTA METALLURGICA SINICA
 |
| ISSN | 0412-1961 |
| Volume | 39Issue:4Pages:381-386 |
| Abstract | Variation 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. |
| Keyword | maraging steel solution temperature fracture toughness reverted austenite precipitate segregation ultra-purified melting |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000182921300010 |
| Publisher | SCIENCE CHINA PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/117764 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | He, Y |
| Affiliation | Chinese 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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