Simulation of internal stresses near the surface and fatigue crack nucleation for a copper single crystal in cyclic deformation saturation stage
文献类型：期刊论文
| 作者 | Yang, JH; Zhang, XP; Mai, YW; Li, Y |
| 刊名 | ACTA METALLURGICA SINICA
 |
| 出版日期 | 2005 |
| 卷号 | 41期号:1页码:9-14 |
| 关键词 | copper single crystal cyclic deformation crack nucleation discrete dislocation dynamics internal stress distribution |
| ISSN号 | 0412-1961 |
| 通讯作者 | Yang, JH(jihong.yahg@aeromech.usyd.edu.au) |
| 英文摘要 | SEM-ECC technique was employed to observe and characterize the dislocation microstructures during the saturation stage of cyclic deformations in a copper single crystal. Some band-like or spot-like dark zones were found in the dislocation microstructures, which located either at the edge region of the deformed specimen or at the interface between the dislocation matrix and the PSB. To interpret the experiment results, the near surface dislocation microstructure were simulated and the internal stress distributions induced by those dislocations were calculated by using discrete dislocation dynamics method. The simulation results show that near the free surface region, the maximum internal stresses or stress concentration, appear at the dark zones which correspond to the interfaces between the PSB and the dislocation matrix or the PSB-matrix-surface interfaces, meaning that fatigue cracks initiate preferentially at these dark zones. The simulated results can well explain the observated ones. |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000227020500002 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.imr.ac.cn/handle/321006/84781]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Yang, JH |
| 作者单位 | 1.Shenyang Normal Univ, Coll Phys & Technol, Shenyang 110034, Peoples R China 2.Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China 3.Univ Sydney, CAMT, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia |
| 推荐引用方式 GB/T 7714 | Yang, JH,Zhang, XP,Mai, YW,et al. Simulation of internal stresses near the surface and fatigue crack nucleation for a copper single crystal in cyclic deformation saturation stage[J]. ACTA METALLURGICA SINICA,2005,41(1):9-14. |
| APA | Yang, JH,Zhang, XP,Mai, YW,&Li, Y.(2005).Simulation of internal stresses near the surface and fatigue crack nucleation for a copper single crystal in cyclic deformation saturation stage.ACTA METALLURGICA SINICA,41(1),9-14. |
| MLA | Yang, JH,et al."Simulation of internal stresses near the surface and fatigue crack nucleation for a copper single crystal in cyclic deformation saturation stage".ACTA METALLURGICA SINICA 41.1(2005):9-14. |
入库方式： OAI收割
来源：金属研究所
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