Martensitic transformation dominated tensile plastic deformation of nanograins in a gradient nanostructured 316L stainless steel

doi:10.1016/j.actamat.2023.118780

IMR OpenIR

	Martensitic transformation dominated tensile plastic deformation of nanograins in a gradient nanostructured 316L stainless steel
	Fang, T. H.; Tao, N. R.
通讯作者	Tao, N. R.(nrtao@imr.ac.cn)
	2023-04-15
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	248 页码:10
摘要	We systematically investigated the tensile deformation mechanisms and mechanical properties of a gradient nanograined AISI 316 L stainless steel prepared by means of surface mechanical grinding treatment. The gradient nanograined samples exhibit a good synergy of high strength and remarkable tensile ductility at room temperature. Microstructural observations revealed that martensitic transformation co-operating with grain boundary migration accommodates the tensile plastic deformation of nanograins in the topmost layer of gradient nanograined 316 L SS, which is distinct from the traditional partial dislocation associated deformation twinning in homogeneous coarse-grained counterpart under tension loading. Accompanied by the decrease in grain boundary migration rate, the martensite content increases significantly with increasing tensile strain, reaching similar to 50% at a true strain of 50%. The newly formed martensites as strengthening phase not only provide dynamic work hardening, but also effectively suppress the strain localization, resulting in the substantial tensile ductility of the gradient nanograins.
关键词	Gradient nanograins 316L stainless steel Deformation mechanism Martensitic transformation Tensile ductility
资助者	National Science Foundation of China
DOI	10.1016/j.actamat.2023.118780
收录类别	SCI
语种	英语
资助项目	National Science Foundation of China[91963110] ; National Science Foundation of China[51701069]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000991725700001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：27[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/321006/177672
专题	中国科学院金属研究所
通讯作者	Tao, N. R.
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Fang, T. H.,Tao, N. R.. Martensitic transformation dominated tensile plastic deformation of nanograins in a gradient nanostructured 316L stainless steel[J]. ACTA MATERIALIA,2023,248:10.
APA	Fang, T. H.,&Tao, N. R..(2023).Martensitic transformation dominated tensile plastic deformation of nanograins in a gradient nanostructured 316L stainless steel.ACTA MATERIALIA,248,10.
MLA	Fang, T. H.,et al."Martensitic transformation dominated tensile plastic deformation of nanograins in a gradient nanostructured 316L stainless steel".ACTA MATERIALIA 248(2023):10.