Stress relaxation behavior of Ti-6Al-4V alloy

来源期刊：中国有色金属学报(英文版)2003年第4期

论文作者：刘勇 尹钟大 朱景川 李明伟

文章页码：881 - 884

Key words：stress relaxation; Ti-6Al-4V alloy; microstructure; deformation mechanism

Abstract: The stress relaxation behavior of Ti-6Al-4V alloy was studied and the change in microstructure resulted from stress relaxation was observed by TEM. Results show that stress relaxes very fast in the first stage while slowly in the second stage; the relationship between plastic strain rate and stress can be obtained from stress relaxation experiments. The plastic strain rate exponent is 4 at 400℃, and 1.6 at 600℃. TEM observation and plastic strain rate exponent show that the dominant deformation mechanisms are dislocation creep at 400℃, recovery creep at 600℃ and recrystallization at 800℃, respectively. The stress relaxation mechanism figure is given.