Simultaneous improvement of strength and plasticity: Nano-twin construction for a novel high-nitrogen TWIP steel
文献类型：期刊论文
| 作者 | Lu, Sihan1,2; Wang, Qingchuan1; Yao, Tingting1; Feng, Hao3; Gao, Ming1; Xi, Tong1; Li, Huabing3; Tan, Lili1; Yang, Ke1 |
| 刊名 | INTERNATIONAL JOURNAL OF PLASTICITY
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| 出版日期 | 2024-12-01 |
| 卷号 | 183页码:18 |
| 关键词 | TWIP steels High-nitrogen Strength Plasticity Nano-twins Stacking fault energy |
| ISSN号 | 0749-6419 |
| DOI | 10.1016/j.ijplas.2024.104144 |
| 通讯作者 | Wang, Qingchuan(qcwang11s@imr.ac.cn) ; Li, Huabing(lihb@smm.neu.edu.cn) ; Tan, Lili(lltan@imr.ac.cn) |
| 英文摘要 | For metallic materials, an increase in strength generally results in a decrease in plasticity, and the simultaneous improvement of strength and plasticity (SISP) has been a hot but difficult topic. In this study, through high-nitrogen (N) alloying, a novel high-N twinning-induced plasticity (HNTWIP) steel was designed. It was surprisingly found that, with higher N content, the SISP was achieved successfully. Compared to 0.3 N, the ultimate tensile strength and uniform elongation of 0.6 N increased by 95 MPa and 5.6 %, respectively. Systematic microstructural analyses indicated that more and thinner twins formed at higher N content during the deformation. Especially, different with conventional TWIP (CV-TWIP) steels, numerous ultrafine nano-twins (<15 nm) were detected in HN-TWIP steels. Combined with the flow stress analyses, their strengthening behavior was found to be attributed to both the N solid solution strengthening and nano-twin strengthening. More importantly, by promoting planar slip, the ultrafine nano-twins provided an additional work-hardening and delayed the necking appearance, which resulted in plasticity enhancement. In other words, the origin of the strength-ductility trade-off avoidance was the nano-twins/ultrafine nano-twins microstructure. Further studies revealed that, by breaking the conflict of low stacking fault energy (SFE) and excellent austenite stability, HN-TWIP steels obtained a breakthrough reduction in SFE. HN-TWIP steels with the extremely low SFE could acquire the special nano-twin microstructure and the SISP mechanical behavior. Accordingly, only by continuously reducing the SFE in the alloying design, the difficult SISP could be realized in TWIP steels. This is a novel and simple strategy for the modification of the metal mechanical properties, and it is meaningful for materials in engineering applications. |
| 资助项目 | Research Program of Liaoning Province of China[2022020347-JH2/1013] |
| WOS研究方向 | Engineering ; Materials Science ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001334731700001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | Research Program of Liaoning Province of China |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Wang, Qingchuan; Li, Huabing; Tan, Lili |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.China Med Univ, Sch Intelligent Med, Shenyang 110122, Peoples R China 3.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Sihan,Wang, Qingchuan,Yao, Tingting,et al. Simultaneous improvement of strength and plasticity: Nano-twin construction for a novel high-nitrogen TWIP steel[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2024,183:18. |
| APA | Lu, Sihan.,Wang, Qingchuan.,Yao, Tingting.,Feng, Hao.,Gao, Ming.,...&Yang, Ke.(2024).Simultaneous improvement of strength and plasticity: Nano-twin construction for a novel high-nitrogen TWIP steel.INTERNATIONAL JOURNAL OF PLASTICITY,183,18. |
| MLA | Lu, Sihan,et al."Simultaneous improvement of strength and plasticity: Nano-twin construction for a novel high-nitrogen TWIP steel".INTERNATIONAL JOURNAL OF PLASTICITY 183(2024):18. |
入库方式： OAI收割
来源：金属研究所
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