Effects of heat treatment on microstrucutures of a Re-containing Ni-based single crystal superalloy

5th International Symposium on Hydrogen Energy, Renewable Energy and Materials

能源学;材料科学

Zhang, J.^1 ; L.Q., Gao ; Y.F., Liu ; J.X., Zhao ; X.T., Zhang

Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing

100095, China^1

School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Xian

710072, China^2

AECC Sichuan Gas Turbine Establishment, Chengdu

610500, China^3

关键词: Ageing treatments;    Degree of segregation;    Effects of heat treatment;    Microstrucutures;    Ni-based single crystal superalloy;    Phase matrix;    Single crystal superalloys;    Solution heat treatment;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/605/1/012017/pdf
DOI  :  10.1088/1757-899X/605/1/012017

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Effects of heat treatment on microstrucutures of a Re-containing single crystal superalloy have been investigated. The results showed that (γ+γ′) eutectic in as-cast alloy is practically dissolved with solution heat treatment, and the degree of segregation is distinctly decreased. The size, morphology and distribution of γ′ phase are mightily affected by the first-stage ageing treatment temperature. When the first-stage ageing treatment temperature lower than 1160°C, the shape of the γ′ phase is cubic. But the γ′ phase shape is transformed to sphericity when the temperature higher than 1180°C. The γ phase channel width is significantly increased, and the fine γ′ phase precipitated in the γ phase matrix channel.