Superior mechanical properties and deformation mechanisms of a 304 stainless steel plate with gradient nanostructure
文献类型：期刊论文
| 作者 | Sun, Y. T.1,2; Kong, X.1,2; Wang, Z. B.2 |
| 刊名 | INTERNATIONAL JOURNAL OF PLASTICITY
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 155页码:18 |
| ISSN号 | 0749-6419 |
| 关键词 | Gradient nanostructured Austenitic stainless steel Strength-ductility synergy Strain hardening capability Strain incompatibility |
| 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 |
| 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. |
入库方式： OAI收割
来源：金属研究所
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