Study on High-Cycle Fatigue Behavior for TA16 and 690 Tube
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摘要: 采用轴向拉拉的加载方式对蒸汽发生器传热管材料TA16和690进行高周疲劳试验。试验环境为室温空气中。根据试验数据绘制两种材料的应力-循环(S-N)曲线,并通过拟合公式获得相应循环周次下的疲劳极限。对疲劳断口进行扫描电镜(SEM)观察分析,疲劳过程为裂纹源产生、扩展和断裂。Abstract: The high-cycle fatigue experiments for steam generator tube including TA16 and 690 were conducted under axial loadings. The environments were at room temperature in air. The S-N curves were processed according to the experimental data, and the fatigue limit of the cycle is obtained by fitting formula. The fracture morphology was observed by SEM, and the fracture morphology presents areas of crack initiation, crack growth and fracture.
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Key words:
- Heat transfer tube material /
- Stress-cycle /
- High cycle fatigue
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