中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 14 No. 5 October 2004 |
（1. College of Science, Northeastern University,
Shenyang 110004, China;
2. State Key Laboratory of Metal Matrix Composite,
Shanghai Jiaotong University, Shanghai 200030, China）
Abstract:A function is offered to represent the distribution of reduced length of dislocation segments. The segment distribution of materials, e.g., MgO and Cu, can be well described by taking appropriate values of parameters m and n. Based on this function, a model for evaluating the mobile dislocation density is developed. Provided the total dislocation density and applied stress are known, the mobile dislocation density could be readily assessed by using this model. For pure copper the mobile dislocation density and strain rates at deferent strains are evaluated. The calculated results are consistent with the known experimental data.
Key words: mobile dislocation; dislocation segment; distribution function
