循环频率对CMSX—3单晶合金高温疲劳行为的影响

摘要

The high temperature fatigue behaviour and the effect of cyclic frequency on the behaviour of CMSX-3 Nickel:based single crystal superalloy are investigated by MTS machine,metallograph,SEM and TEM.The results show that the increase of cyclic frequency would decrease high temperature fatigue lifetime of the alloy and result in different deformation mechanism.%利用MTS材料试验系统和光学金相、SEM、TEM等分析手段研究了镍基单晶高温合金CMSX—3的高温疲劳行为，重点探讨了循环频率对这种行为的影响。结果表明，循环频率的增加会导致合金高温疲劳寿命的下降及不同的变形机制。