| Strain-Controlled Fatigue Behavior of Nanotwin- Strengthened 304 Austenitic Stainless Steel | |
| Pan Qingsong; Cui Fang; Tao Nairong; Lu Lei | |
| Corresponding Author | Lu Lei(llu@imr.ac.cn) |
| 2022-01-11 | |
| Source Publication | ACTA METALLURGICA SINICA
 |
| ISSN | 0412-1961 |
| Volume | 58Issue:1Pages:45-53 |
| Abstract | 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. |
| Keyword | nanotwin austenitic stainless steel cyclic response fatigue life strain delocalization |
| Funding Organization | 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 |
| DOI | 10.11900/0412.1961.2021.00342 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000773693600004 |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/173084 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Lu Lei |
| Affiliation | Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| Recommended Citation 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. |
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