Superior mechanical properties and deformation mechanisms of a 304 stainless steel plate with gradient nanostructure

doi:10.1016/j.ijplas.2022.103336

IMR OpenIR

	Superior mechanical properties and deformation mechanisms of a 304 stainless steel plate with gradient nanostructure
	Sun, Y. T.1,2; Kong, X.1,2; Wang, Z. B.1
通讯作者	Wang, Z. B.(zbwang@imr.ac.cn)
	2022-08-01
发表期刊	INTERNATIONAL JOURNAL OF PLASTICITY
ISSN	0749-6419
卷号	155 页码:18
摘要	Spatially gradient microstructures have shown a promising application in enhancing strengthductility synergy of engineering metals such as austenitic stainless steels. However, existing approaches are limiting in producing a thick gradient nanostructured (GNS) layer with a high strengthening capability, and the underlying deformation mechanisms are still not clear in GNS austenitic stainless steels. In this work, we developed a new approach, i.e., plate surface mechanical rolling treatment, to produce a bulk gradient nanostructure in a 304 stainless steel plate of -1.90 mm in thickness. Uniaxial tensile tests revealed that an ultra-high yield strength of -1073 MPa with a considerable uniform elongation of -21% was achieved in the GNS sample. Subsequently, the evolutions of microstructure, phase, microhardness, and local strain distribution were systematically studied in the GNS plate during tensile tests. The results demonstrated that the mechanical incompatibilities, relating with the gradient microstructure and martensiteenclosing-austenite domains, contribute to an extra strain-hardening capability, leading to the outstanding strength-ductility synergy in the GNS 304 stainless steel. Furthermore, analyses based on experimental observations and theoretical calculations revealed that dislocation activities, instead of deformation-induced martensite transformation, microstructure refinement, and twinning, play a dominant role in the strain-hardening mechanisms of the GNS plate during tension.
关键词	Gradient nanostructured Austenitic stainless steel Strength-ductility synergy Strain hardening capability Strain incompatibility
资助者	National Key Research and Development Program of China ; CAS-HK Joint Laboratory of Nanomaterials and Mechanics, and Shenyang National Laboratory for Materials Science
DOI	10.1016/j.ijplas.2022.103336
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2017YFA0204401] ; National Key Research and Development Program of China[2017YFA0204403] ; CAS-HK Joint Laboratory of Nanomaterials and Mechanics, and Shenyang National Laboratory for Materials Science
WOS研究方向	Engineering ; Materials Science ; Mechanics
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics
WOS记录号	WOS:000804553800001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：68[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/321006/174162
专题	中国科学院金属研究所
通讯作者	Wang, Z. B.
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	Sun, Y. T.,Kong, X.,Wang, Z. B.. Superior mechanical properties and deformation mechanisms of a 304 stainless steel plate with gradient nanostructure[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2022,155:18.
APA	Sun, Y. T.,Kong, X.,&Wang, Z. B..(2022).Superior mechanical properties and deformation mechanisms of a 304 stainless steel plate with gradient nanostructure.INTERNATIONAL JOURNAL OF PLASTICITY,155,18.
MLA	Sun, Y. T.,et al."Superior mechanical properties and deformation mechanisms of a 304 stainless steel plate with gradient nanostructure".INTERNATIONAL JOURNAL OF PLASTICITY 155(2022):18.