Relationship between Grain Size and Fatigue-Creep Interaction Behaviour of Superalloy GH698
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG1989年第1期
论文作者：杨王玥 张济山 陈国良 田树森 耿清全
文章页码：19 - 25
摘 要：<正> The deformation and fracture behaviourof nickel-base superalloy GH698 with differentgrain size have been studied at 700℃ underfatigue-creep interaction conditions. Comparedwith coarse-grained specimens, the grain refiningprocess shows obvious effect on the mechanicalbehaviour of the alloy, i. e. in F and C zones,the fraction of pure fatigue and creep fractureon fracture surfaces is greatly reduced, whichdecreases and increases the fracture life inzones F and C respectively, in FC and C zones,creep deformation is greatly restrained by thealternating stress component, which increasesthe fracture life remarkably. It is also provedthat in spite of the difference in microstru-tures such as grain size, for a constant tem-perature, a unique life equation tr=An canbe used to predict rupture life within the stressregion controlled by the same fracture mode.
杨王玥，张济山，陈国良，田树森，耿清全
摘 要：<正> The deformation and fracture behaviourof nickel-base superalloy GH698 with differentgrain size have been studied at 700℃ underfatigue-creep interaction conditions. Comparedwith coarse-grained specimens, the grain refiningprocess shows obvious effect on the mechanicalbehaviour of the alloy, i. e. in F and C zones,the fraction of pure fatigue and creep fractureon fracture surfaces is greatly reduced, whichdecreases and increases the fracture life inzones F and C respectively, in FC and C zones,creep deformation is greatly restrained by thealternating stress component, which increasesthe fracture life remarkably. It is also provedthat in spite of the difference in microstru-tures such as grain size, for a constant tem-perature, a unique life equation tr=An canbe used to predict rupture life within the stressregion controlled by the same fracture mode.
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