浅论材料屈强比与低周疲劳寿命之间的关系

摘要

文章通过对IN625、2Cr11Mo1NiWVNbN和1Cr11Co3W3NiMoVNbNB 3种材料不同温度下的高温拉伸力学性能和低周疲劳性能的比较分析，发现室温条件下这3种材料的屈强比和低周疲劳寿命大致有相反的变化趋势，于是进一步通过理论分析，认为对于其他结构材料，这种变化趋势一般也是能够成立的。%By analyzing their high temperature tensile performance and low cycle fatigue life at different temperature, it is found that IN625, 2Cr11Mo1NiWVNbN and 1Cr11Co3W3NiMoVNbNB’s yield ratios are inversely correlated with their low cycle fatigue lifes at room temperature, and this variation trend is also applied to other structure materials by theoretical analysis.