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以单相近β钛合金Ti-35V-15Cr-0.15Si-0.05C为研究对象,利用计算机辅助设计软件对合金循环变形中的平面滑移行为进行研究,分析平面滑移行为的产生机理。结果表明,随着循环周次的增加,钛合金塑性变形能量增大,滑移线周围开始有裂纹产生。应力的提高以及合金中纳米级颗粒的出现都有利于平面滑移的发生。钛合金变形过程中基体中的位错密度不断下降,并伴有位错残余的产生,且滑移线始终并行不交叉。
The single-phase near-Ti alloy Ti-35V-15Cr-0.15Si-0.05C was taken as the research object, and the plane slip behavior in the cyclic deformation of the alloy was studied by computer aided design software to analyze the generation mechanism of the plane slip behavior. The results show that the plastic deformation energy of titanium alloy increases with the increase of the number of cycles, and cracks begin to occur around the slip line. The increase of stress and the appearance of nanoscale particles in the alloy all contribute to the occurrence of plane slip. The density of dislocations in the matrix during the deformation of titanium alloy is continuously decreased with the occurrence of dislocation residuals, and the slip lines always do not cross in parallel.