Stabilizing nanograined austenitic stainless steel with grain boundary relaxation

doi:10.1016/j.actamat.2023.119134

IMR OpenIR

	Stabilizing nanograined austenitic stainless steel with grain boundary relaxation
	Jiang, Y.1,2; Zhou, X.1; Li, X. Y.1; Lu, K.1
通讯作者	Li, X. Y.(xyli@imr.ac.cn)
	2023-09-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	256 页码:8
摘要	Grain boundary (GB) relaxation can be triggered by interaction of GB with partial dislocations during plastic deformation, which is effective to stabilize nanograined structures in a number of face-centered cubic (FCC) metals and alloys. But this mechanism is interfered by deformation-induced martensitic transformation in 304 stainless steels with a metastable FCC structure. In this work, gradient FCC nanograined structures were prepared in a 304 stainless steel by using warm surface mechanical grinding treatment. GB relaxation was triggered in the samples with grains below 60 nm in size, in which partial dislocation dominates the plastic deformation. With the GB relaxation, thermal stability increases with decreasing grain sizes, contradictory to the conventional "smaller less stable" trend. The onset temperature for coarsening of nanograins of-30 nm in size is as high as-896 degrees C (0.7 Tm), about 250 degrees C above the reported value of the steel. The GB relaxation was not detected in martensitic nanograins of the same composition, of which the instability temperatures is around 650 degrees C (0.54 Tm), independent of grain size from 26 nm to the submicron scale, as it is controlled by the reverse martensitic transformation.
关键词	304 stainless steel Grain boundary relaxation Austenite Martensite
资助者	Ministry of Science and Tech- nology of China
DOI	10.1016/j.actamat.2023.119134
收录类别	SCI
语种	英语
资助项目	Ministry of Science and Tech- nology of China[2017YFA0204401] ; Ministry of Science and Tech- nology of China[2017YFA0700700]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001033975200001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：15[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/321006/178643
专题	中国科学院金属研究所
通讯作者	Li, X. Y.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Y.,Zhou, X.,Li, X. Y.,et al. Stabilizing nanograined austenitic stainless steel with grain boundary relaxation[J]. ACTA MATERIALIA,2023,256:8.
APA	Jiang, Y.,Zhou, X.,Li, X. Y.,&Lu, K..(2023).Stabilizing nanograined austenitic stainless steel with grain boundary relaxation.ACTA MATERIALIA,256,8.
MLA	Jiang, Y.,et al."Stabilizing nanograined austenitic stainless steel with grain boundary relaxation".ACTA MATERIALIA 256(2023):8.