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

doi:10.1016/j.ijplas.2022.103336

CORC > 金属研究所 > 中国科学院金属研究所

	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.2
刊名	INTERNATIONAL JOURNAL OF PLASTICITY
	2022-08-01
卷号	155 页码:18
关键词	Gradient nanostructured Austenitic stainless steel Strength-ductility synergy Strain hardening capability Strain incompatibility
ISSN号	0749-6419
DOI	10.1016/j.ijplas.2022.103336
通讯作者	Wang, Z. B.(zbwang@imr.ac.cn)
英文摘要	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.
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
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000804553800001
资助机构	National Key Research and Development Program of China ; CAS-HK Joint Laboratory of Nanomaterials and Mechanics, and Shenyang National Laboratory for Materials Science
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174161]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, Z. B.
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, 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.