Dislocation Strengthening without Ductility Trade-off in Metastable Austenitic Steels
文献类型：期刊论文
| 作者 | Liu JB; Jin YB; Fang XY; Chen CX; Feng Q; Liu XW; Chen YZ; Suo T; Zhao F; Huang TL |
| 刊名 | SCIENTIFIC REPORTS
 |
| 出版日期 | 2016 |
| 卷号 | 6页码:35345 |
| 通讯作者邮箱 | htw@zju.edu.cn ; jianlu@cityu.edu.hk |
| ISSN号 | 2045-2322 |
| 产权排序 | [Liu, Jiabin] Xi An Jiao Tong Univ, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Peoples R China; [Liu, Jiabin; Fang, Xiaoyang; Chen, Chenxu; Meng, Liang] Zhejiang Univ, Coll Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China; [Jin, Yongbin; Feng, Qiong; Wang, Hongtao; Yang, Wei] Zhejiang Univ, Inst Appl Mech, Hangzhou 310027, Zhejiang, Peoples R China; [Liu, Xiaowei; Lu, Jian] City Univ Hong Kong, Dept Mech & Biomed Engn, Hong Kong, Hong Kong, Peoples R China; [Chen, Yuzeng; Suo, Tao] Northwestern Polytech Univ, Xian 710072, Peoples R China; [Zhao, Feng] Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China; [Huang, Tianlin] Coll Mat Sci & Engn, Chongqing 400044, Peoples R China; [Wang, Xi] Beijing Jiaotong Univ, Sch Mech Elect & Control Engn, Beijing 100044, Peoples R China; [Fang, Youtong] Zhejiang Univ, Coll Elect Engn, Hangzhou 310027, Zhejiang, Peoples R China; [Wei, Yujie] Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China |
| 通讯作者 | Wang, HT (reprint author), Zhejiang Univ, Inst Appl Mech, Hangzhou 310027, Zhejiang, Peoples R China. ; Lu, J (reprint author), City Univ Hong Kong, Dept Mech & Biomed Engn, Hong Kong, Hong Kong, Peoples R China. |
| 中文摘要 | Strength and ductility are mutually exclusive if they are manifested as consequence of the coupling between strengthening and toughening mechanisms. One notable example is dislocation strengthening in metals, which invariably leads to reduced ductility. However, this trend is averted in metastable austenitic steels. A one-step thermal mechanical treatment (TMT), i.e. hot rolling, can effectively enhance the yielding strength of the metastable austenitic steel from 322 +/- 18 MPa to 675 +/- 15 MPa, while retaining both the formability and hardenability. It is noted that no boundaries are introduced in the optimized TMT process and all strengthening effect originates from dislocations with inherited thermal stability. The success of this method relies on the decoupled strengthening and toughening mechanisms in metastable austenitic steels, in which yield strength is controlled by initial dislocation density while ductility is retained by the capability to nucleate new dislocations to carry plastic deformation. Especially, the simplicity in processing enables scaling and industrial applications to meet the challenging requirements of emissions reduction. On the other hand, the complexity in the underlying mechanism of dislocation strengthening in this case may shed light on a different route of material strengthening by stimulating dislocation activities, rather than impeding motion of dislocations. |
| 分类号 | 一类 |
| 类目[WOS] | Multidisciplinary Sciences |
| 研究领域[WOS] | Science & Technology - Other Topics |
| 收录类别 | SCI |
| 原文出处 | http://dx.doi.org/10.1038/srep35345 |
| 语种 | 英语 |
| WOS记录号 | WOS:000385314400001 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/59768]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Liu JB,Jin YB,Fang XY,et al. Dislocation Strengthening without Ductility Trade-off in Metastable Austenitic Steels[J]. SCIENTIFIC REPORTS,2016,6:35345. |
| APA | Liu JB.,Jin YB.,Fang XY.,Chen CX.,Feng Q.,...&Wei YJ.(2016).Dislocation Strengthening without Ductility Trade-off in Metastable Austenitic Steels.SCIENTIFIC REPORTS,6,35345. |
| MLA | Liu JB,et al."Dislocation Strengthening without Ductility Trade-off in Metastable Austenitic Steels".SCIENTIFIC REPORTS 6(2016):35345. |
入库方式： OAI收割
来源：力学研究所
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