| Martensitic transformation dominated tensile plastic deformation of nanograins in a gradient nanostructured 316L stainless steel | |
| Fang, T. H.; Tao, N. R. | |
| Corresponding Author | Tao, N. R.(nrtao@imr.ac.cn) |
| 2023-04-15 | |
| Source Publication | ACTA MATERIALIA
 |
| ISSN | 1359-6454 |
| Volume | 248Pages:10 |
| Abstract | 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. |
| Keyword | Gradient nanograins 316L stainless steel Deformation mechanism Martensitic transformation Tensile ductility |
| Funding Organization | National Science Foundation of China |
| DOI | 10.1016/j.actamat.2023.118780 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Science Foundation of China[91963110] ; National Science Foundation of China[51701069] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000991725700001 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/177672 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Tao, N. R. |
| Affiliation | Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China |
| Recommended Citation 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. |
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