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晶界结构对多晶材料的机械性能和物理性能有着重要的影响[1]。在晶界附近经常出现奇异的动力学现象,且裂纹也易于沿晶界扩展。为了更好地了解晶界结构对材料性能的影响,有必要首先确定晶界的原子结构。以γ-TiAl为基的合金是一种很有发展前途的高温合金[2,3],由于γ-TiAl合金的
The grain boundary structure has an important influence on the mechanical and physical properties of polycrystalline materials [1]. Singular kinetic phenomena often occur near the grain boundaries, and the cracks also tend to expand along the grain boundaries. In order to better understand the effect of grain boundary structure on material properties, it is necessary to first determine the atomic structure of grain boundaries. Γ-TiAl-based alloy is a very promising high temperature alloys [2,3], as γ-TiAl alloy