论文部分内容阅读
研究了在室温拉伸试验过程中,不同应变速率对Ti1023钛合金力学性能的影响。结果表明,抗拉强度、断后伸长率和断面收缩率受应变速率变化的影响较小。屈服强度对应变速率比较敏感,随着应变速率增加,屈服强度不断提高,本试验条件下的屈服强度变化范围超过15%。并根据不同应变速率下的屈服强度,得到了应变速率和屈服强度的关系。根据应力-应变曲线以及拉伸前后试样的显微组织变化,发现Ti1023合金拉伸过程伴随应力诱发马氏体相变。
The effects of different strain rates on the mechanical properties of Ti1023 titanium alloy were investigated during the tensile test at room temperature. The results show that the tensile strength, elongation at break and the reduction of area are less affected by the change of strain rate. The yield strength is more sensitive to the strain rate. As the strain rate increases, the yield strength increases continuously. The yield strength under this test condition varies by more than 15%. According to the yield strength under different strain rates, the relationship between strain rate and yield strength was obtained. According to the stress-strain curves and the microstructure changes of the samples before and after stretching, it is found that the tensile process of Ti1023 alloy is accompanied by stress-induced martensitic transformation.