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Characterisation of creep-fatigue crack growth behaviour for Alloy 617 on circular notched specimen

机译:圆形切口试样上617合金的蠕变疲劳裂纹扩展行为的表征

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摘要

In this study, by conducting the creep-fatigue crack growth tests using circular notched round bar specimens for Alloy 617, the crack growth behaviour was characterized on the basis of crack growth data obtained from the direct current potential drop (DCPD) method, which results in the assurance of the high accuracy of crack length measurement. Furthermore, on the basis of catastrophe theory, an attempt is made to predict theoretically the threshold temperature of creep crack growth related to the diffusion creep mechanism.
机译:在这项研究中,通过使用圆形缺口圆棒试样对617合金进行蠕变疲劳裂纹扩展测试,基于从直流电势降(DCPD)方法获得的裂纹扩展数据来表征裂纹扩展行为。保证了裂缝长度测量的高精度。此外,基于突变理论,试图从理论上预测与扩散蠕变机理有关的蠕变裂纹扩展的阈值温度。

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