Simultaneous enhancement of stress- and strain-controlled fatigue properties in 316L stainless steel with gradient nanostructure

doi:10.1016/j.actamat.2019.02.008

IMR OpenIR

	Simultaneous enhancement of stress- and strain-controlled fatigue properties in 316L stainless steel with gradient nanostructure
	Lei, Y. B.1,2; Wang, Z. B.1; Xu, J. L.1; Lu, K.1
通讯作者	Wang, Z. B.(zbwang@imr.ac.cn)
	2019-04-15
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	168 页码:133-142
摘要	A gradient nanostructured (GNS) surface layer with full austenitic phase was synthesized on AISI 316L stainless steel by surface mechanical rolling treatment at -280 degrees C. The mean grain size is similar to 45 nm at the top surface and increases gradually with depth. Deformation-induced martensite (DIM) transformation was suppressed and the microstructural refinement was dominated by dislocation activities and twinning during the formation of the GNS layer. Axial tension-compression fatigue tests showed that fatigue strength and life are simultaneously enhanced in the GNS samples relative to the corresponding coarse-grained counterparts in both stress- and strain-controlled tests. This is very different from fatigue behavior of conventional nanostructured materials, i.e. an enhanced stress-controlled fatigue strength with a decreased strain-controlled fatigue life. Besides contributions from the enhanced mechanical properties and the suppressed surface defects formation, analyses of fatigue mechanisms demonstrated that the promoted formation of DIM during cyclic strain plays a crucial role in enhancing fatigue properties of the GNS samples in strain-controlled tests. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Gradient nanostructured Surface mechanical rolling treatment AISI 316L stainless steel Strain-controlled fatigue Deformation-induced martensite
资助者	National Key Research and Development Program of China ; Shenyang National Laboratory for Materials Science
DOI	10.1016/j.actamat.2019.02.008
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] ; Shenyang National Laboratory for Materials Science[2015RP04]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000464086500012
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：113[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/321006/132917
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, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Lei, Y. B.,Wang, Z. B.,Xu, J. L.,et al. Simultaneous enhancement of stress- and strain-controlled fatigue properties in 316L stainless steel with gradient nanostructure[J]. ACTA MATERIALIA,2019,168:133-142.
APA	Lei, Y. B.,Wang, Z. B.,Xu, J. L.,&Lu, K..(2019).Simultaneous enhancement of stress- and strain-controlled fatigue properties in 316L stainless steel with gradient nanostructure.ACTA MATERIALIA,168,133-142.
MLA	Lei, Y. B.,et al."Simultaneous enhancement of stress- and strain-controlled fatigue properties in 316L stainless steel with gradient nanostructure".ACTA MATERIALIA 168(2019):133-142.