热疲劳现象普遍地发生在机械制造、航空、冶金、建筑、化工、动力等各个领域。本文简要介绍各种热疲劳试验方法,并重点评述单轴应力热疲劳试验法。一热疲劳试验的类型与特点1 实物型热疲劳试验燃气轮机叶群用实际燃烧器进行热循环试验是这种方法的典型例子。以叶片而言,除热应力外,还存在因离心力引起的机械应力。对于热疲劳试验来说,除了应考虑因温度变化而引起的热应力或热应变,同时将实况条件下的机械应力或机械应变迭加上去才是我们真正所要达到的定量分析的目的。2 热应变自身约束型热疲劳试验实物型热疲劳试验法不能达到定量分析的目的, Thermal fatigue commonly occurs in machinery manufacturing, aviation, metallurgy, construction, chemicals, power and other fields. This article briefly introduces various thermal fatigue test methods, and focuses on the uniaxial stress thermal fatigue test method. A type of thermal fatigue test and characteristics 1 physical thermal fatigue test Gas turbine blade group with a real burner for thermal cycling test is a typical example of this method. In terms of blades, in addition to thermal stress, there are mechanical stress caused by centrifugal force. For thermal fatigue tests, in addition to considering the thermal stress caused by temperature changes or thermal strain, while the actual conditions of mechanical stress or mechanical strain added up is that we really want to achieve the purpose of quantitative analysis. 2 thermal strain self-restraint thermal fatigue test Physical thermal fatigue test method can not achieve the purpose of quantitative analysis,