Structure analysis on stress rupture notch sensitivity for GH2909 alloy forgings

doi:10.13251/j.issn.0254-6051.2020.05.004

Abstract

Abstract: Structure analysis on stress rupture specimens were conducted by the means of metallographic and SEM methods, to define the problem of different level notch sensitivity for GH2909 alloy forgings. The results show that whether the alloy exhibits persistent notch sensitivity is a probabilistic event to the GH2909 alloy with a particular phase distribution. The occurrence probability of notch sensitivity increases apparently when the Laves phase precipitates in film-like shape on grain boundary.

Key words: GH2909 alloy, notch sensitivity, rupture, grain boundary

CLC Number:

TG113

Li Zhao, Wang Tao, Xu Xiong, Luo Junpeng, Sheng Junying. Structure analysis on stress rupture notch sensitivity for GH2909 alloy forgings[J]. Heat Treatment of Metals, 2020, 45(5): 17-22.

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