Influence of microstructure degradation induced by pretreatment on the creep behavior in Ni-based single-crystal superalloy with different orientations

Wenyan Gan, Hangshan Gao, Yanchao Zhao, Zhixun Wen, Guangxian Lu, Bo Jiang, Zhufeng Yue

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7 引用 (Scopus)

摘要

The effects of stress-free and stress-assisted pretreatments at a relatively high temperature on the creep properties of [001] and [011] oriented Ni-based single-crystal superalloys are investigated in this article. The results show that the creep life of the pretreated samples is shorter than that of the original samples. The variation of the γ/γ′ morphology during the creep process is characterized by the microstructure period. Based on the interaction between the dislocations in the γ matrix channel and the γ′ phase, the difference in creep properties of the two oriented alloys after pretreatment is analyzed. Combined with the crystal plasticity theory and the number of activated slip systems observed in the experiments, it can be concluded that the two oriented alloys after pretreatment show obvious creep anisotropy and that the creep life increases with the number of activated slip system.

源语言英语
页(从-至)610-622
页数13
期刊Journal of Materials Research
35
6
DOI
出版状态已出版 - 30 3月 2020

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