Heat Treatment of Metals ›› 2022, Vol. 47 ›› Issue (4): 46-52.DOI: 10.13251/j.issn.0254-6051.2022.04.007

• MICROSTRUCTURE AND PROPERTIES • Previous Articles     Next Articles

Effect of solution treatment on microstructure of GH4080A superalloy

Lian Yibo1, Yang Chunlei2, Wang Guodong2, Song Wei1   

  1. 1. SINOMACH Jiangsu Co., Ltd., Jiangyin Jiangsu 214000, China;
    2. Institute of Novel Metals and Applied Technologies, Jiangsu Industrial Technology Research Institute, Changshu Jiangsu 215506, China
  • Received:2021-12-30 Revised:2022-01-28 Online:2022-04-25 Published:2022-05-19

Abstract: Effect of different solution treatment on microstructure of GH4080A superalloy was studied by using electron backscatter diffraction (EBSD) technology. The results show that the dynamic recrystallization during the rolling process of the initial hot-rolled bar is insufficient, and there are unrecrystallized grains as well as many inside-grain small-angle grain boundaries. When the solution treatment temperature is 1020 ℃, the recrystallization is mainly in the stage of nucleation. With the increase of solution treatment temperature, the recrystallization nucleation is completed basically and the grain growth stage begins. The recrystallization process is accompanied by the transformation from small-angle misorientation to large-angle misorientation, and lamellar {111} twin structure and a large number of Σ3 grain boundaries are found during the recrystallization process.

Key words: GH4080A alloy, recrystallization, twins, misorientation, grain size

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