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硼的添加增强了晶界的结合力 ,使合金相界面的位错组态改变 ,提高了持久断裂寿命 ;硼的添加细化晶粒 ,增加界面数 ,使持久寿命下降。Ni3Al定向凝固横向试样持久性能不稳定与取样位置有关
The addition of boron enhances the binding force of the grain boundaries, changes the dislocation configuration of the alloy phase interface and improves the long-term fracture life. The addition of boron increases the grain size and increases the number of interfaces, which leads to the decrease of long-term life expectancy. Ni3Al directional solidification transverse specimen instability and sampling location