基于体育器械的钛合金超塑性变形试验分析

Experimental Analysis of Superplastic Deformation of Titanium Alloy Based on Sports Equipment

钛合金作为体育器械中使用较为频繁的材料,文章对其超塑性变形进行试验研究。分析不同应变速率和变形温度下合金的显微组织变化规律、断后伸长率等,然后还分析钛合金的超塑性变形机理。研究结果表明,合金的断后伸长率与应变速率呈反比关系,合金的断后伸长率与应变速率呈正比关系,且合金在任何温度和速率下,其断后伸长率都超过100%;当应变速率下降时,合金中α相尺寸不断增加,β晶粒由拉长状变成等轴状;当变形温度不断增加时,α相数量不断降低,形态由长条状变为等轴状或者短棒状。

Titanium alloy is a more frequently used material in sports equipment.The paper conducted an experimental study on its superplastic deformation.Analyze the changes of the microstructure of the alloy at different strain rates and deformation temperatures,elongation after fracture,etc.,and then analyze the superplastic deformation mechanism of the titanium alloy.The results show that the elongation at break of the alloy is inversely proportional to the strain rate,and the elongation at break of the alloy is proportional to the strain rate,and the elongation at break of the alloy exceeds 100%at any temperature and rate;when the strain rate decreases,the size of theαphase in the alloy continues to increase,and theβcrystal grains change from elongated shape to equiaxed shape;when the deformation temperature continues to increase,the number ofαphases continues to decrease,and the shape changes from elongated to equiaxed or short rod shape.