316L不锈钢室温和高温单轴循环行为实验研究

对316L不锈钢分别进行了室温、高温单轴应变控制和应力控制下的系统循环试验，揭示和分析了循环应变幅值、为幅值历史以及温度历史对应变循环特性的影响以及应力幅值、平均应力和温度及其历史对循环棘轮行为的影响。研究表明，无论是单轴应变循环特性是还是非对称单轴应力下的棘轮效应不仅依赖于当前温度和加载状态，而且还于温度和加载的历史，并得到了关于316L不锈钢室温和高温单轴循环行为的若干有意义的结果。

Experimental Study under Uniaxial Cyclic Behavior at Room and High Temperature of 316L Stainless Steel

An experimental study was carried out of the cyclic properties of 316L stainless steel subjected to uniaxial strain and stress at room and high temperature.In this paper,the effects of cyclic strain amplitude,temperature and their histories on the cyclic deformation behavior of 316L stainless steel are investigated.And,the influences of stress amplitude,mean stress,temperature and their histories on ratcheting are also analyzed.It is shown that either uniaxial cyclic property under cyclic strain or ratcheting under asymmetric uniaxial cyclic stress depends not only on the current temperature and loading state,but also on the previous temperature and loading history.Some significant results are obtained.