将位错的增殖、湮没与相互反应看作化学反应，位错在热激活作用下具有扩散性质。
We regard the proliferation, the annihilating and the mutual reactions of the dislocations as chemical reactions, dislocations under action of heat activation will have properties of diffusion.
氢促进了位错的运行与增殖，从而影响裂纹的萌生与扩展。
Hydrogen enhanced the activity and multiplication of dislocation, so that initiation and propagation of the micro cracks were affected.
对拉伸断口附近显微组织的观察表明，前者基体中位错进一步增殖，后者则存在明显的位错环。
The microstructural observation near the fracture indicated that dislocations increased in the matrix of the former composite, while obvious dislocation loops were found in the latter.
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