| Cu-assisted austenite reversion and enhanced TRIP effect in maraging stainless steels | |
| Niu, M. C.1,2,3; Yang, K.2; Luan, J. H.4; Wang, W.2; Jiao, Z. B.3,5 | |
| Corresponding Author | Wang, W.(wangw@imr.ac.cn) ; Jiao, Z. B.(zb.jiao@polyu.edu.hk) |
| 2022-03-30 | |
| Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| ISSN | 1005-0302 |
| Volume | 104Pages:52-58 |
| Abstract | Control of the formation and stability of reverted austenite is critical in achieving a favorable combination of strength, ductility, and toughness in high-strength steels. In this work, the effects of Cu precipitation on the austenite reversion and mechanical properties of maraging stainless steels were investigated by atom probe tomography, transmission electron microscopy, and mechanical tests. Our results indicate that Cu accelerates the austenite reversion kinetics in two manners: first, Cu, as an austenite stabilizer, increases the equilibrium austenite fraction and hence enhances the chemical driving force for the austenite forma-tion, and second, Cu-rich nanoprecipitates promote the austenite reversion by serving as heterogeneous nucleation sites and providing Ni-enriched chemical conditions through interfacial segregation. In addi-tion, the Cu precipitation hardening compensates the strength drop induced by the formation of soft reverted austenite. During tensile deformation, the metastable reverted austenite transforms to marten-site, which substantially improves the ductility and toughness through a transformation-induced plastic-ity (TRIP) effect. The Cu-added maraging stainless steel exhibits a superior combination of a yield strength of-1.3 GPa, an elongation of-15%, and an impact toughness of-58 J. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| Keyword | Maraging stainless steel TRIP effect Austenite reversion Cu-rich nanoprecipitate |
| Funding Organization | National Natural Science Foundation of China ; State Key Laboratory for Advanced Metals and Materials Open Fund ; Chinese National Engineering Research Centre for Steel Construction (Hong Kong Branch) at PolyU ; Guangzhou International Science & Technology Cooperation Program ; Youth Innovation Promotion Association of Chinese Academy of Sciences ; Innovation Project of Institute of Metal Research ; National Natural Science Foundation of China Research Fund for International Young Scientists |
| DOI | 10.1016/j.jmst.2021.06.055 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51472249] ; National Natural Science Foundation of China[51801169] ; State Key Laboratory for Advanced Metals and Materials Open Fund[2017-ZD01] ; Chinese National Engineering Research Centre for Steel Construction (Hong Kong Branch) at PolyU[P0013862] ; Guangzhou International Science & Technology Cooperation Program[201907010026] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2017233] ; Innovation Project of Institute of Metal Research[2015-ZD04] ; National Natural Science Foundation of China Research Fund for International Young Scientists[51750110515] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000773072000006 |
| Publisher | JOURNAL MATER SCI TECHNOL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/173023 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wang, W.; Jiao, Z. B. |
| Affiliation | 1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 3.Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Peoples R China 4.City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China 5.Hong Kong Polytech Univ, Shenzhen Res Inst, Shenzhen, Guangdong, Peoples R China |
| Recommended Citation GB/T 7714 | Niu, M. C.,Yang, K.,Luan, J. H.,et al. Cu-assisted austenite reversion and enhanced TRIP effect in maraging stainless steels[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,104:52-58. |
| APA | Niu, M. C.,Yang, K.,Luan, J. H.,Wang, W.,&Jiao, Z. B..(2022).Cu-assisted austenite reversion and enhanced TRIP effect in maraging stainless steels.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,104,52-58. |
| MLA | Niu, M. C.,et al."Cu-assisted austenite reversion and enhanced TRIP effect in maraging stainless steels".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 104(2022):52-58. |
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