Prestraining effect on creep behaviour of nickel base C263 superalloy
作者： Y. H. Zhang , D. M. Knowles
DOI: 10.1179/026708302225004838
关键词: Alloy 、 Materials science 、 Cavitation 、 Stress concentration 、 Grain boundary 、 Creep 、 Superalloy 、 Lüders band 、 Nucleation 、 Metallurgy
摘要: AbstractThe effect of room temperature plastic deformation on the subsequent creep behaviour C263 alloy has been studied. Creep tests were carried out at 800°C and prestraining was conducted in tension up to a level 7·2%. Prestraining slightly increased minimum rate. Progressive loss life fracture ductility found with increasing amount prestrain. Concomitantly, density grain boundary cavities significantly. It also that reduced incubation time for cavity nucleation promoted homogeneity distribution along boundaries. Cavity be associated stress concentration produced by slip bands. The activity cavitation prestrained specimens related an band during prestraining. By calculation via dislocation pile-up model, it concluded high, sustained built ahead bands cavit...
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