Atomic-scale understanding of solute interaction effects on grain boundary segregation, precipitation, and fracture of ultrahigh-strength maraging steels

doi:10.1016/j.actamat.2023.118972

IMR OpenIR

	Atomic-scale understanding of solute interaction effects on grain boundary segregation, precipitation, and fracture of ultrahigh-strength maraging steels
	Niu, M. C.1,2; Chen, C. J.3,4; Li, W.1,3,5; Yang, K.5; Luan, J. H.6; Wang, W.5; Jiao, Z. B.1,2
通讯作者	Wang, W.(wangw@imr.ac.cn) ; Jiao, Z. B.(zb.jiao@polyu.edu.hk)
	2023-07-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	253 页码:13
摘要	Understanding the fundamental mechanisms of embrittlement and de-embrittlement is crucial for the development of strategies toward advanced steels with improved performance. In this study, the solute interaction effects on grain boundary (GB) segregation, precipitation, and fracture of Fe-Ni-Ti-(Mo) maraging steels were systematically investigated through a combination of experimental and theoretical techniques, including scanning transmission electron microscopy, atom probe tomography, and first-principles calculations. Our results reveal that the Fe-Ni-Ti maraging steel suffers from serious intergranular embrittlement and the mechanism is related to the formation of coarse Ni3Ti precipitates and associated precipitate-free zones (PFZs) at GBs, which facilitate the crack initiation and growth along the GBs. Interestingly, adding Mo to the maraging steel effectively suppresses the intergranular embrittlement, thereby substantially improving the ductility. Atomistic analyses reveal that Mo de-embrittles the GBs by reducing the segregation of Ni and Ti, which substantially inhibits the formation of coarse Ni3Ti precipitates and PFZs at the GBs, thereby alleviating their harmful impact on the GB cracking. In addition, the Mo segregation enhances the GB cohesion, which may play a minor role in suppressing the GB fracture.
关键词	Maraging steel Grain boundary embrittlement Precipitation Grain boundary segregation
资助者	National Natural Science Foundation of China ; Research Grants Council of Hong Kong ; Shenzhen Science and Technology Program ; Research Institute for Advanced Manufacturing at PolyU ; Hong Kong Polytechnic University ; Youth Innovation Promotion Association of Chi-nese 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.actamat.2023.118972
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51472249] ; National Natural Science Foundation of China[52171162] ; National Natural Science Foundation of China[51801169] ; Research Grants Council of Hong Kong[ECS 25202719] ; Research Grants Council of Hong Kong[GRF 15227121] ; Research Grants Council of Hong Kong[C1020-21 GF] ; Shenzhen Science and Technology Program[JCYJ20210324142203009] ; Research Institute for Advanced Manufacturing at PolyU[P0041364] ; Hong Kong Polytechnic University[P0038814] ; Hong Kong Polytechnic University[P0039624] ; Youth Innovation Promotion Association of Chi-nese 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研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001106752800001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177316
专题	中国科学院金属研究所
通讯作者	Wang, W.; Jiao, Z. B.
作者单位	1.Hong Kong Polytech Univ, Res Inst Adv Mfg, Dept Mech Engn, Hong Kong, Peoples R China 2.Hong Kong Polytech Univ, Shenzhen Res Inst, Shenzhen 518057, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 5.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 6.City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Niu, M. C.,Chen, C. J.,Li, W.,et al. Atomic-scale understanding of solute interaction effects on grain boundary segregation, precipitation, and fracture of ultrahigh-strength maraging steels[J]. ACTA MATERIALIA,2023,253:13.
APA	Niu, M. C..,Chen, C. J..,Li, W..,Yang, K..,Luan, J. H..,...&Jiao, Z. B..(2023).Atomic-scale understanding of solute interaction effects on grain boundary segregation, precipitation, and fracture of ultrahigh-strength maraging steels.ACTA MATERIALIA,253,13.
MLA	Niu, M. C.,et al."Atomic-scale understanding of solute interaction effects on grain boundary segregation, precipitation, and fracture of ultrahigh-strength maraging steels".ACTA MATERIALIA 253(2023):13.