The dislocationdistribution function in the plastic zone at a crack tip is calculated with the help of a modified BCS-type crack model.
本文改进BCS型裂纹位错模型，并对裂纹顶端范性区的位错密度分布进行了计算。
2
Tem observations show that with decreasing the temperature, the inhomogeneity of the dislocationdistribution near tensile fracture surfaces is increased.
TEM观察表明，随着试验温度的降低，拉伸断口附近位错分布不均匀性增大。
3
Cold deformation results in increasing of dislocation density and inhomogeneous dislocationdistribution, the latter is the direct reason for pre-strain to promote microstructural evolution.