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Heterogeneous lamella structure unites ultrafine-grain strength with coarse-grain ductility
文献类型：期刊论文
| 作者 | Wu XL(武晓雷) ; Yang MX; Yuan FP(袁福平); Wu GL; Wei YJ(魏宇杰); Huang XX; Zhu YT
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| 刊名 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
 |
| 出版日期 | 2015-11-24 |
| 卷号 | 112期号:47页码:14501-14505 |
| 通讯作者邮箱 | xlwu@imech.ac.cn ; ytzhu@ncsu.edu |
| 关键词 | back-stress hardening heterogeneous lamella structure ductility strength strain partitioning |
| ISSN号 | 0027-8424 |
| 产权排序 | [Wu, Xiaolei; Yang, Muxin; Yuan, Fuping; Wei, Yujie] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; [Wu, Guilin; Huang, Xiaoxu] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China; [Zhu, Yuntian] Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Jiangsu, Peoples R China; [Zhu, Yuntian] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA |
| 通讯作者 | Wu, XL (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. |
| 中文摘要 | Grain refinement can make conventional metals several times stronger, but this comes at dramatic loss of ductility. Here we report a heterogeneous lamella structure in Ti produced by asymmetric rolling and partial recrystallization that can produce an unprecedented property combination: as strong as ultrafine-grained metal and at the same time as ductile as conventional coarse-grained metal. It also has higher strain hardening than coarse-grained Ti, which was hitherto believed impossible. The heterogeneous lamella structure is characterized with soft micrograined lamellae embedded in hard ultrafine-grained lamella matrix. The unusual high strength is obtained with the assistance of high back stress developed from heterogeneous yielding, whereas the high ductility is attributed to back-stress hardening and dislocation hardening. The process discovered here is amenable to large-scale industrial production at low cost, and might be applicable to other metal systems. |
| 分类号 | 一类 |
| 类目[WOS] | Multidisciplinary Sciences |
| 研究领域[WOS] | Science & Technology - Other Topics |
| 关键词[WOS] | SEVERE PLASTIC-DEFORMATION ; PASSIVATED COPPER NANOPILLARS ; RANGE INTERNAL-STRESSES ; NANOSTRUCTURED METALS ; BAUSCHINGER ; STRAIN ; DISLOCATION ; CRYSTALS ; STEEL ; FILMS |
| 收录类别 | SCI |
| 原文出处 | http://dx.doi.org/10.1073/pnas.1517193112 |
| 语种 | 英语 |
| WOS记录号 | WOS:000365173100046 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/58382]  |
| 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 | Wu XL,Yang MX,Yuan FP,et al. Heterogeneous lamella structure unites ultrafine-grain strength with coarse-grain ductility[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2015,112(47):14501-14505. |
| APA | Wu XL.,Yang MX.,Yuan FP.,Wu GL.,Wei YJ.,...&Zhu YT.(2015).Heterogeneous lamella structure unites ultrafine-grain strength with coarse-grain ductility.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,112(47),14501-14505. |
| MLA | Wu XL,et al."Heterogeneous lamella structure unites ultrafine-grain strength with coarse-grain ductility".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 112.47(2015):14501-14505. |
入库方式： OAI收割
来源：力学研究所
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