新型钴基高温合金中W元素对蠕变组织和性能的影响

陈佳, 郭敏, 杨敏, 刘林, 张军

Effects of W Concentration on Creep Microstructure and Property of Novel Co-Based Superalloys

CHEN Jia, GUO Min, YANG Min, LIU Lin, ZHANG Jun

图3 不同W含量合金在900℃、275 MPa压缩蠕变过程中γ/γʹ两相组织演化

Fig.3 Simulated (a-c) and experimental[9] (d-f) results of γ/γ' micrstructures at different plastic strains (1.0%, 1.5%, 2.0%, 3.0%) during 900oC, 275 MPa compressive creep for alloys with different W contents (The arrows represent the applied compressive stress σa; the red elliptical regions imply the corners of γ' precipitate protruding outward; the red rectangular region and the green elliptical region implies the formation of continuous rafts and “small island” γ matrix embedded in the rafted γ', respectively) (a, d) 8W (b, e) 9W (c) 10W (f) 11W (Co-9Al-11W)