Strain-Controlled Fatigue Behavior of Nanotwin- Strengthened 304 Austenitic Stainless Steel

doi:10.11900/0412.1961.2021.00342

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	Strain-Controlled Fatigue Behavior of Nanotwin- Strengthened 304 Austenitic Stainless Steel
	Pan Qingsong; Cui Fang; Tao Nairong; Lu Lei
刊名	ACTA METALLURGICA SINICA
	2022-01-11
卷号	58 期号:1 页码:45-53
关键词	nanotwin austenitic stainless steel cyclic response fatigue life strain delocalization
ISSN号	0412-1961
DOI	10.11900/0412.1961.2021.00342
通讯作者	Lu Lei(llu@imr.ac.cn)
英文摘要	Engineering nano-scale twin boundaries has been recognized as a novel strategy to achieve a superior combination of tensile strength, ductility, and fatigue limit in metallic materials. However, to date, the strain-controlled fatigue behavior of nanotwin (NT)-strengthened metals is still rarely explored, most possibly owing to the difficulty in preparing bulk fatigue samples. In this work, a bulk heterogeneously structured 304 stainless steel (304 SS) containing 30% volume fraction of NT bundles embedded in the micrometer-sized grain matrix was prepared and studied under constant plastic strain amplitude-controlled fatigue tests. A considerable fatigue life and much higher cyclic flow stress level, while maintaining a weaker degree of cyclic softening at larger strain amplitude, was achieved in NT-strengthened 304 SS, compared with its coarse-grained counterpart in the same strain-controlled fatigue tests. This is fundamentally distinct from the more obvious softening behavior of conventional nanostructured metals induced by strain localization at larger strain amplitude. Such exceptional low-cycle fatigue properties were attributed to the presence of a high-strength NT structure associated with novel mechanical stability and its co-deformation with surrounding grains, effectively suppressing strain localization and fatigue crack initiation.
资助项目	National Natural Science Foundation of China[51931010] ; National Natural Science Foundation of China[92163202] ; National Natural Science Foundation of China[52122104] ; National Natural Science Foundation of China[52071321] ; Key Research Program of Frontier Science and International Partnership Program, Chinese Academy of Sciences[GJHZ2029] ; Liaoning Revitalization Talents Program[XLYC1802026] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[2019196]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000773693600004
资助机构	National Natural Science Foundation of China ; Key Research Program of Frontier Science and International Partnership Program, Chinese Academy of Sciences ; Liaoning Revitalization Talents Program ; Youth Innovation Promotion Association, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173083]
专题	金属研究所_中国科学院金属研究所
通讯作者	Lu Lei
作者单位	Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Pan Qingsong,Cui Fang,Tao Nairong,et al. Strain-Controlled Fatigue Behavior of Nanotwin- Strengthened 304 Austenitic Stainless Steel[J]. ACTA METALLURGICA SINICA,2022,58(1):45-53.
APA	Pan Qingsong,Cui Fang,Tao Nairong,&Lu Lei.(2022).Strain-Controlled Fatigue Behavior of Nanotwin- Strengthened 304 Austenitic Stainless Steel.ACTA METALLURGICA SINICA,58(1),45-53.
MLA	Pan Qingsong,et al."Strain-Controlled Fatigue Behavior of Nanotwin- Strengthened 304 Austenitic Stainless Steel".ACTA METALLURGICA SINICA 58.1(2022):45-53.