本文对一种高铝钛镍基铸造合金,在不同温度分别测定单调持久、周期持久和低周疲劳性能。确定了以蠕变、疲劳和蠕变-疲劳损伤为主的三个温度区。 试验结果表明,温度是影响蠕变-疲劳交互作用的主要因素,并得到金相断口的证实。
The effect of cyclic stress on the strength of creep rupture and recurrent creep rupture as well as low cycle fatigue of a cast nickel-base superalloy with high Al and Ti contents has been studied under different temperature and stress. It was found that the temperature is the main factor influenced upon the creepfatigue interaction. There are three temperature ranges leading to damage of creep, fatigue or combination of creep-fatigue individuaUy. The tested results were identified by some SEM fractographs.
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