论文部分内容阅读
基于全片层 γ- Ti Al基合金的微结构 ,通过细观力学的方法和位错发射机理建立了临界屈服载荷与片层夹角的定量关系。同时还从连续细观力学的角度给出了横向同性片层复合材料计算基体Mises等效应力的一种解析方法 ,并用于分析全片层γ- Ti Al基合金材料的屈服。两种分析结果表明基于位错发射机理的方法与实验结果相吻合 ,这说明全片层γ- Ti Al基合金的屈服载荷与片层夹角的变化关系是由 γ相的次微结构中滑移系与载荷的夹角决定
Based on the microstructure of full-thickness γ-TiAl-based alloy, the quantitative relationship between the critical yield load and the included angle of the lamella was established by means of mesomechanics and dislocation emission mechanism. At the same time, an analytical method for calculating Mises equivalent stress of transversely isotropic sheet composites is also given from the perspective of continuous mesomechanics, and is used to analyze the yielding of γ-Ti Al-based alloying materials. The results of two kinds of analysis show that the method based on the dislocation emission mechanism agrees well with the experimental results, which shows that the relationship between the yield load of the full γ-Ti Al-based alloy and the variation of the included angle of the lamellar γ- Moving system and the angle between the load decision