Stabilizing nanograined austenitic stainless steel with grain boundary relaxation
文献类型：期刊论文
| 作者 | Jiang, Y.1,2; Zhou, X.2; Li, X. Y.2; Lu, K.2 |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2023-09-01 |
| 卷号 | 256页码:8 |
| 关键词 | 304 stainless steel Grain boundary relaxation Austenite Martensite |
| ISSN号 | 1359-6454 |
| DOI | 10.1016/j.actamat.2023.119134 |
| 通讯作者 | Li, X. Y.(xyli@imr.ac.cn) |
| 英文摘要 | Grain boundary (GB) relaxation can be triggered by interaction of GB with partial dislocations during plastic deformation, which is effective to stabilize nanograined structures in a number of face-centered cubic (FCC) metals and alloys. But this mechanism is interfered by deformation-induced martensitic transformation in 304 stainless steels with a metastable FCC structure. In this work, gradient FCC nanograined structures were prepared in a 304 stainless steel by using warm surface mechanical grinding treatment. GB relaxation was triggered in the samples with grains below 60 nm in size, in which partial dislocation dominates the plastic deformation. With the GB relaxation, thermal stability increases with decreasing grain sizes, contradictory to the conventional "smaller less stable" trend. The onset temperature for coarsening of nanograins of-30 nm in size is as high as-896 degrees C (0.7 Tm), about 250 degrees C above the reported value of the steel. The GB relaxation was not detected in martensitic nanograins of the same composition, of which the instability temperatures is around 650 degrees C (0.54 Tm), independent of grain size from 26 nm to the submicron scale, as it is controlled by the reverse martensitic transformation. |
| 资助项目 | Ministry of Science and Tech- nology of China[2017YFA0204401] ; Ministry of Science and Tech- nology of China[2017YFA0700700] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001033975200001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | Ministry of Science and Tech- nology of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/178642]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Li, X. Y. |
| 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 | Jiang, Y.,Zhou, X.,Li, X. Y.,et al. Stabilizing nanograined austenitic stainless steel with grain boundary relaxation[J]. ACTA MATERIALIA,2023,256:8. |
| APA | Jiang, Y.,Zhou, X.,Li, X. Y.,&Lu, K..(2023).Stabilizing nanograined austenitic stainless steel with grain boundary relaxation.ACTA MATERIALIA,256,8. |
| MLA | Jiang, Y.,et al."Stabilizing nanograined austenitic stainless steel with grain boundary relaxation".ACTA MATERIALIA 256(2023):8. |
入库方式： OAI收割
来源：金属研究所
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