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A Study on Fatigue Crack Growth Behavior of Aged Stainless Steel at Elevated Temperatures

机译：高温下时效不锈钢疲劳裂纹扩展行为的研究

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摘要

The effect of aging at 650 deg. C in air for 100-1000hr on tensile properties in range RT-750 deg. C and fatigue crack growth behavior at room temperature (RT) and 650 deg. C was Studied. Yield strength and ultimate tensile strength were almost the same for the as-received (as-rec.) and the aged specimens. The fracture strain, however, decreased significantly by the aging and the fracture surface of the aged at RT test was intergranular. As test temperature increased, yield strength, ultimate tensile strength and elongation decreased. And serration was observed at 550-650 deg. C. As strain rate decreased, yield strength and Ultimate tensile strength decreased, but elongation increased.
机译：650度时效的影响。室温下在室温下100-1000小时的拉伸性能在RT-750度范围内。 C和疲劳裂纹在室温（RT）和650度下的生长行为。研究了C。屈服强度和极限抗拉强度几乎与接收和老化试样相同。然而，随着时间的流逝，断裂应变显着降低，并且在RT测试中，时效的断裂表面是晶间的。随着测试温度的升高，屈服强度，极限抗拉强度和伸长率降低。并且在550-650度观察到锯齿。 C.随着应变率降低，屈服强度和极限拉伸强度降低，但伸长率增加。

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