在高温合金中,堆垛层错强化起着重要的作用。层错强化机制的主要特征在于其强化效果不随温度的升高而减弱。本实验采用X射线透射织构方法,测定了Nb对一种Ni基高温合金基体堆垛层错能的影响。测试结果表明,随着Nb含量的增加,所研究合金的层错能值逐渐下降,因而引起扩展位错宽度不断加大,使位错交叉滑移的阻力上升,结果导致合金高温强度的提高。 In the superalloy, stacking fault stacking plays an important role. The main feature of the mechanism of strata fault enhancement is that its strengthening effect does not diminish with increasing temperature. In this experiment, X-ray transmission texture method was used to determine the influence of Nb on the stacking fault energy of a Ni-based superalloy substrate. The results show that with the increase of Nb content, the stacking fault energy of the alloy decreases gradually, which results in the increase of dislocation spreading width and the increase of the resistance of dislocation cross-slip. As a result, the high temperature strength of the alloy increases.