高温超声拉压疲劳试件设计与温度自动控制  

On the Specimen Design and Temperature Automatic Control for Ultrasonic Tension-Compression Fatigue Test at High Temperature

作　　者：李久楷[1] 刘永杰[1] 王清远[1,2] 侯方[1] 

机构地区：[1]四川大学建筑与环境学院,成都610065 [2]四川大学空天科学与工程学院,成都610065

出　　处：《实验力学》2016年第2期149-156,共8页Journal of Experimental Mechanics

基　　金：国家自然科学基金(11327801;11172188;11302142;11502151)资助

摘　　要：本文较深入地开展了高温环境条件下的超声拉压疲劳实验系统研究,深入分析了试件温度高精测量与自动控制和高温试件设计的关键问题。实验系统可以实现高温环境条件下大于1010周次超高周次的疲劳加载。本实验系统利用传统超声疲劳试验机,使用非接触式红外测温仪对试件温度进行实时动态监测,采用间歇振动的方法保证温度波动小于±3℃。实验结果显示,采用本系统得到的实验结果与传统疲劳加载方式的结果一致性很好。本文工作为进一步开展高温环境条件下金属材料高温超高周(>1010周次)疲劳损伤和疲劳破坏机理研究提供了新的有效的平台。In this paper, experimental system for ultrasonic tension-compression fatigue test in high temperature environment is studied, and the key problems about high precision measurement and automatic control of temperature and high temperature specimen design are analyzed in depth. The experimental system improved by authors can realize higher than 10^10 times super high cycle fatigue loading in high temperature environment. This experiment system uses the traditional ultrasonic fatigue testing machine, and uses non contact infrared temperature measuring instrument to realize real time dynamic temperature monitoring of specimen, and adopts intermittent vibration method to ensure that the temperature fluctuation is less than±3℃. Experimental results show that results obtained from this system are in good agreement with the results obtained from conventional fatigue loading method. The work presented in this paper provides a new and effective platform for further study of fatigue damage and fatigue failure mechanism of metal material subjected to super high cycle （〉10^10 times） loading and in high temperature environment.

关 键 词：高温 超高周疲劳 感应加热 红外测温 

分 类 号：TG113.25[金属学及工艺—物理冶金]