摘要
研究变形工艺对Ti-6Al-4V合金微观组织演变和温度敏感性指数的影响。等温压缩实验选取的变形温度为1123～1213 K、应变速率为0.01～10.0 s-1、变形程度为30%,50%,70%。结果表明,初生α相晶粒尺寸和体积分数随着变形温度升高和应变速率增加逐渐减小;温度敏感性指数随着变形温度升高和应变速率增加逐渐增大;应变增加时,初生α相晶粒尺寸和体积分数变化不明显,温度敏感性指数减小。
The effects of deformation process parameters on the microstructure evolution and temperature sensitivity exponent of Ti-6A1-4V alloy were investigated. The isothermal compression of the alloy was conducted at deformation temperatures ranging from 1123-1213 K with an interval of 30 K, the strain rates of 0.01, 0.05, 0.1 and 10.0 s-1 and the height reduction of 30%, 50%, 70%. According to the experimental results of Ti-6A1-4V alloy, the grain size and volume fraction of primary cx phase decrease with the increase of deformation temperature and strain rate. The temperature sensitivity exponent increases with the increase of deformation temperature and strain rate; when strain increases, the grain size and volume fraction of primary a phase does not obviously change, and the temperature sensitivity exponent reduces.
出处
《热加工工艺》
CSCD
北大核心
2012年第14期89-93,共5页
Hot Working Technology
