相界上运动位错的弹性场

ELASTIC FIELD OF A DISLOCATION UNIFORMLY MOVING ON THE PHASE BOUNDARY

本文推广Eshelby等人关于无限各向异性介质中静止直线位错的处理方法,提出了计算两相介质中相界面上匀速运动位错弹性场的方案。本文所提出的简便方法有一般的适用性,可直接用于研究在相界面上高速运动的相变位错的行为,从而有助于理解位错运动在无扩散相变过程中的作用。最后对本文的方法及观察到的场中的间断面作了简短讨论。

We extended the method of Eshelby et al.for treating a static straight dislocation in infinite anisotropic medium, to compute the elastic field of a dislocation uniformly moving on the phase boundary of a two-phase medium. The simple theory proposed in this paper is applicable in general, and can be employed directly to investigate the behavior of a tranformation dislocation in high speed motion on phase boundary, and therefore be helpful in understanding the role played by the motion of transformation dislocation in diffusionless phase transformation. Finally, the method used in this work and the discontinuity appeared in the computed field are discussed in brief.