金属间化合物作为新型材料由于具有耐高温、抗氧化、耐磨损等特点越来越受到材料界的青睐。本实验所研究的Ti46Al8N1B由γ-TiAl和α2-Ti3Al两相组成,对其进行热循环和外加应力热循环处理,观察由此产生的孪晶及孪晶中的位错并对孪生产生的机制进行了讨论。在无应力条件及300MPa As a new type of intermetallic compounds due to high temperature, oxidation resistance, wear resistance and other characteristics of the material sector more and more by the favor. The Ti46Al8N1B studied in this experiment consists of two phases, γ-TiAl and α2-Ti3Al, which are subjected to thermal cycling and stress-induced thermal cycling to observe the resulting twin and twin dislocations and the mechanism of twin generation Discussed. In the stress-free conditions and 300MPa