To address the time-dependent properties of rolled AZ31B alloy, we conducted typical tests of the rate jump, creep, and stress relaxation at room temperature and 393 K. In the rate jump tests, the tensile curve exhibited a strong dependence on the strain rate, whereas compression was totally insensitive to the stress rate at both temperatures. For the creep and stress relaxation test, we observed creep strain and decay stress in the compression, which was weaker than the tensile curve. The plastic viscosity increased at 393 K because the dislocation motion was thermally activated. We then applied thermal activation theory for the repeated stress relaxation tests. The activation volume implies that cross-slip and dislocation nucleation are the operating mechanisms for creep and stress relaxation.

为了解决轧制AZ31B合金随时间变化的特性，我们对室温和393 K下的速率跳跃，蠕变和应力松弛进行了典型测试。在速率跳跃测试中，拉伸曲线表现出对应变速率的强烈依赖性，而压缩对两个温度下的应力率完全不敏感。对于蠕变和应力松弛测试，我们在压缩过程中观察到蠕变应变和衰减应力，该强度比拉伸曲线弱。塑性粘度在393 K时增加，因为位错运动被热激活。然后，我们将热激活理论应用于重复应力松弛测试。激活量表明交叉滑动和位错成核是蠕变和应力松弛的操作机制。