| 磁致塑性的位错机理 |
| |
| 引用本文： | 刘兆龙,胡海云,范天佑.磁致塑性的位错机理[J].北京理工大学学报,2007,27(2):113-115. |
| |
| 作者姓名： | 刘兆龙 胡海云 范天佑 |
| |
| 作者单位： | 北京理工大学,理学院,北京,100081;北京理工大学,理学院,北京,100081;北京理工大学,理学院,北京,100081 |
| |
| 摘 要： | 采用佩尔斯-纳巴罗的部分离散位错模型,计算了磁场中直刃型位错的错排能,推导出在静磁场中位错滑移所需克服晶体点阵阻力的最大值--佩-纳力,给出了佩-纳力与磁场强度、材料性质间的关系.结果表明:若材料中的位错具有顺磁性,佩-纳力的值比无磁场时的值减少,位错更容易运动,材料塑性增强.该结论与已有的磁塑效应实验中观察到的现象一致.当磁场为0时,所得佩-纳力的值可退化为已知的原佩-纳力.
|
| 关 键 词： | 佩-纳力 位错 磁塑效应 |
| 文章编号： | 1001-0645(2007)02-0113-03 |
| 收稿时间： | 6/9/2005 12:00:00 AM |
| 修稿时间： | 06 9 2005 12:00AM |
Dislocation Mechanism of Magnetoplasticity |
| |
| LIU Zhao-long,HU Hai-yun and FAN Tian-you.Dislocation Mechanism of Magnetoplasticity[J].Journal of Beijing Institute of Technology(Natural Science Edition),2007,27(2):113-115. |
| |
| Authors: | LIU Zhao-long HU Hai-yun and FAN Tian-you |
| |
| Institution: | School of Science, Beijing Institute of Technology, Beijing 100081, China |
| |
| Abstract: | Peierls-Nabarro model is used to study the effect of magnetic fields on a straight edge dislocation.The Peierls-Nabarro force is calculated according to the model.The result shows that,in the presence of an external magnetic field,the Peierls-Nabarro force decreases for paramagnetic dislocations.This suggests that the plasticity of specimen can be increased because paramagnetic dislocations are easier to move in an external magnetic field due to the decrease of the critical shear stress.The result is consistent with the known magnetoplasticity effect. |
| |
| Keywords: | Peierls-Nabarro force dislocation magnetoplasticity |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《北京理工大学学报》浏览原始摘要信息 |
| 点击此处可从《北京理工大学学报》下载免费的PDF全文 |
|
