| 高温合金蠕变位错攀移控制的空洞形核时间 |
| |
| 引用本文： | 尹久仁,张平,张俊彦.高温合金蠕变位错攀移控制的空洞形核时间[J].湘潭大学自然科学学报,2000,22(4):35-38. |
| |
| 作者姓名： | 尹久仁 张平 张俊彦 |
| |
| 作者单位： | 湘潭大学一般力学与材料工程研究所,湘潭,411105 |
| |
| 基金项目： | 国家自然科学基金资助项目(19772044) |
| |
| 摘 要： | 对高温合金的稳态蠕变，利用位错扩散攀移理论解释了空位凝聚和空洞形成核的过程，得出０空位凝聚并形成空位集团主要是由于位错攀移所发射（湮没）空位，引起局部空位浓度异常所致。利用Ｒ．Ｌａｇｎｅｂｏｒｇ的稳态蠕空控制方程导出稳态蠕变空洞形核的临界时间ｔｃ的表达式。
|
| 关 键 词： | 稳态蠕变 空位凝聚 高温合金 位错扩散攀移理论 |
| 文章编号： | 1000-5900(2000)04-0035-04 |
| 修稿时间： | 1999年12月5日 |
On the Cimb - Controlled Creep Cavity Nucleated Time of Alloy in High Temperature |
| |
| YIN Jiure,ZHANY Ding,ZHANG Junyan.On the Cimb - Controlled Creep Cavity Nucleated Time of Alloy in High Temperature[J].Natural Science Journal of Xiangtan University,2000,22(4):35-38. |
| |
| Authors: | YIN Jiure ZHANY Ding ZHANG Junyan |
| |
| Abstract: | In this paper the process of vacancy condensation and nucleation is explained by the theory of diffuse dislocation climb for steady creep of alloy in high temperature. It is provided that vacancy condensation and the form of vacancy group are mainly caused by the abnormal vacancy chroma which caused by dislocation climb. An expression of critical nucleation time T c of steady creep is gained using Lagneborg s control equation of steady creep. |
| |
| Keywords: | high temperature creep climb vacancy condensation nucleated time |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
