Evaluation of mobile dislocation density based on distribution function of dislocation segments

来源期刊：中国有色金属学报(英文版)2004年第5期

论文作者：周志敏 孙艳蕊 周海涛

文章页码：977 - 980

Key words：mobile dislocation; dislocation segment; distribution function

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.