Study on Creep Damage of Ni-Based Superalloy Caused by Variable Load Conditions at Elevated Temperatures
MATERIALS(2021)
摘要
Higher fatigue and creep resistance at high temperatures are the essential properties for materials such as those used in gas turbines for power generation and aircraft turbines. Therefore, the nickel-based superalloy CMSX-4 was developed through single-crystal casting to satisfy these requirements. In this study, the CMSX-4 creep test results reported by previous researchers were used to mathematically derive an equation to estimate the amount of creep damage occurring under variable load conditions. In addition, low-cycle fatigue tests were performed, and the effect of creep damage occurring during fatigue on material failure was described.
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关键词
low-cycle fatigue,creep,CMSX-4,Ni-based superalloy
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