Effect of temperature on dislocation emission from crack tip for BCC metal Mo
文献类型：期刊论文
| 作者 | Tang QH(汤奇恒) ; Wang ZQ(王自强)
|
| 刊名 | Acta Mechanica Solida Sinica
 |
| 出版日期 | 1998 |
| 卷号 | 11期号:3页码:189-198 |
| ISSN号 | 0894-9166 |
| 中文摘要 | The effect of thermally activated energy on the dislocation emission from a crack tip in BCC metal Mo is simulated in this paper. Based on the correlative reference model on which the flexible displacement boundary scheme is introduced naturally, the simulation shows that as temperature increases the critical stress intensity factor for the first dislocation emission will decrease and the total number of emitted dislocations increase for the same external load. The dislocation velocity and extensive distance among partial dislocations are not sensitive to temperature. After a dislocation emission, two different deformation slates are observed, the stable and unstable deformation states. In the stable deformation slate, the nucleated dislocation will emit from the crack tip and piles up at a distance far away from the crack tip, after that the new dislocation can not be nucleated unless the external loading increases. In the unstable deformation state, a number of dislocations can be emitted from the crack lip continuously under the same external load. |
| 学科主题 | 力学 |
| 类目[WOS] | Materials Science, Multidisciplinary ; Mechanics |
| 研究领域[WOS] | Materials Science ; Mechanics |
| 关键词[WOS] | TO-DUCTILE TRANSITION ; SILICON ; NUCLEATION ; SIMULATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000076190600001 |
| 公开日期 | 2007-06-15 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/15971]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Tang QH,Wang ZQ. Effect of temperature on dislocation emission from crack tip for BCC metal Mo[J]. Acta Mechanica Solida Sinica,1998,11(3):189-198. |
| APA | 汤奇恒,&王自强.(1998).Effect of temperature on dislocation emission from crack tip for BCC metal Mo.Acta Mechanica Solida Sinica,11(3),189-198. |
| MLA | 汤奇恒,et al."Effect of temperature on dislocation emission from crack tip for BCC metal Mo".Acta Mechanica Solida Sinica 11.3(1998):189-198. |
入库方式： OAI收割
来源：力学研究所
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