Beyond Orowan hardening: Mapping the four distinct mechanisms associated with dislocation-precipitate interaction
文献类型：期刊论文
| 作者 | Peng, Shenyou ; Wang, Zhili; Li, Jia; Fang, Qihong; Wei YJ(魏宇杰)
|
| 刊名 | INTERNATIONAL JOURNAL OF PLASTICITY
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 169页码:103710 |
| 关键词 | Dislocation Precipitate Orowan hardening Radiation-emission Interface-nucleation |
| ISSN号 | 0749-6419 |
| DOI | 10.1016/j.ijplas.2023.103710 |
| 英文摘要 | The conventional role played by precipitates in crystalline solids is in blocking the motion of dislocations and for consequentially hardening, a mechanism attributed to Orowan's finding. Recent experiments and theoretical analysis demonstrated that a few nanometre-sized pre-cipitates, when dispersed in advanced metals at fine spacing, can further boost their strength at no sacrifice in ductility. In this paper, we construct the deformation map of four distinct mechanisms associated with dislocation-precipitate interaction: at low-to-intermediate stress level, disloca-tions may loop around a precipitate or cut-through it. In both scenarios the precipitates harden the materials and there is no net gaining of dislocations. At high stress level, nanoscale pre-cipitates may in contrast act as dislocation sources and generate dislocations from the matrix-precipitate interface - an interface-nucleation process; or emit dislocations when highly stressed dislocations transverse them - a radiation-emission process. While the interface-nucleation mechanism could supply sustainable dislocation multiplication, the radiation-emission leads to the multiplication of two additional dislocations. Based on large-scale simula-tions and theoretical analysis, we construct a deformation map on dislocation-precipitate inter-action in terms of stress and precipitate size. The revealed mechanisms and the dislocation-precipitate interaction map pave the way for strength-ductility optimization in materials through precipitation engineering. |
| 分类号 | 一类 |
| WOS研究方向 | Engineering ; Materials Science ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001050863200001 |
| 资助机构 | National Natural Science Foundation of China [12102133, 12172123, 12072109, 11988102] |
| 其他责任者 | Fang, QH (corresponding author), Hunan Univ, Coll Mech & Vehicle Engn, Changsha 410082, Peoples R China. ; Wei, YJ (corresponding author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/92655]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.{Wei Yujie} Eastern Inst Adv Study EIAS Ningbo 315200 Peoples R China 2.{Wei Yujie} Chinese Acad Sci Inst Mech LNM Beijing 100190 Peoples R China 3.{Peng Shenyou, Wang Zhili, Li Jia, Fang Qihong} Hunan Univ Coll Mech & Vehicle Engn Changsha 410082 Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng, Shenyou,Wang, Zhili,Li, Jia,et al. Beyond Orowan hardening: Mapping the four distinct mechanisms associated with dislocation-precipitate interaction[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2023,169:103710. |
| APA | Peng, Shenyou,Wang, Zhili,Li, Jia,Fang, Qihong,&魏宇杰.(2023).Beyond Orowan hardening: Mapping the four distinct mechanisms associated with dislocation-precipitate interaction.INTERNATIONAL JOURNAL OF PLASTICITY,169,103710. |
| MLA | Peng, Shenyou,et al."Beyond Orowan hardening: Mapping the four distinct mechanisms associated with dislocation-precipitate interaction".INTERNATIONAL JOURNAL OF PLASTICITY 169(2023):103710. |
入库方式： OAI收割
来源：力学研究所
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