基于红外热像法的AZ31B镁合金温度演化与疲劳寿命预测
Saved in:
| Published in | 中国有色金属学报：英文版 no. 7; pp. 1942 - 1948 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
2013
|
| Subjects | |
| Online Access | Get full text |
Cover
Loading…
| Bibliography: | 43-1239/TG The surface temperature of extruded AZ31B alloy plate was measured by infrared thermograph in air during tension and high-cycle fatigue tests. The mechanism of heat production was discussed and the value of critical fatigue damage temperature was calculated according to the P—ΔT curve. Results show that the variation trend of temperature is different between tension and fatigue tests. The temperature evolution in tension test consists of four stages： linear decrease, reverse linear increase, abrupt increase, and final drop. The initial decrease of temperature is caused by thermal elastic effect, which is corresponding to the elastic deformation in tension progress. When cyclic loading is above the fatigue limit, the temperature evolution mainly undergoes five stages： initial increase, steep reduction, steady state, abrupt increase, and final drop. The peak temperature in fatigue test is caused by strain hardening that can be used to evaluate the fatigue life of magnesium alloy. The critical temperature variation that causes the fatigue failure is 3.63 K. When ΔT≤3.63 K, the material is safe under cyclic loading. When ΔT3.63 K, the fatigue life is determined by cycle index and peak temperature. Zhi-feng YAN,Hong-xia ZHANG,Wen-xian WANG,Kai WANG,Fei-fei PEI （College of Material Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China） AZ31B magnesium alloy; high-cycle fatigue; thermographic analysis; temperature evolution |
|---|---|
| ISSN: | 1003-6326 |