WASPALOY合金长期时效过程中的组织演变和性能变化
Mechanical Properties and Microstructure Evolution of WASPALOY after Long Exposure
摘 要
研究了WASPALOY合金在高温长期时效过程中的组织演变和相关性能的变化.结果表明:合金在704 ℃时效后显微组织稳定性良好,大、小γ′相生长缓慢,在760 ℃时效后大γ′相趋于在晶界处聚集长大;室温冲击韧度随时效时间的延长整体下降,为韧性断裂;室温硬度随时效时间的延长而降低;室温拉伸强度和塑性不随时效时间的延长而变化.
显微组织
γ′相
力学性能
WASPALOY
microstructure
γ′ phase
mechanical property
Abstract
The isothermal microstructure evolution and mechanical properties of WASPALOY during long-term aging at elevated temperature were investigated.The alloy had good microstructure stability during long exposure at 704 ℃ for up to 5 000 h and the growth kinetics of the spherical γ′ phase was rather sluggish.The big particle of γ′ phase tended to aggregate in grain boundaries at 760 ℃ aging.Room temperature impact ductility decreased with the aging time increasing.Room temperature hardness decreased with prolonged aging time and this result can be attributed to the sluggish growth of γ′ phase.The aging time had almost no effect on room temperature tensile strength and ductility of the alloy.
中图分类号 TG132.32
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收稿日期 2005/9/25
修改稿日期 2005/12/10
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备注赵双群(1969-),男,河南南阳人,副教授,博士.
引用该论文: ZHAO Shuang-qun,XIE Xi-shan. Mechanical Properties and Microstructure Evolution of WASPALOY after Long Exposure[J]. Materials for mechancial engineering, 2006, 30(10): 62～65
赵双群,谢锡善. WASPALOY合金长期时效过程中的组织演变和性能变化[J]. 机械工程材料, 2006, 30(10): 62～65
被引情况:
【1】孙克君,盖秀颖,李晨希,宋小平, "GH864合金在超温条件下碳化物含量与持久强度的关系",理化检验－物理分册 45, 393-396(2009)
【2】秦子威,汪宏斌,吴益文, "连铸无磁辊用X5NiCrTi2615MoAlVB钢中时效析出相的长大动力学",机械工程材料 40, 27-29(2016)
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参考文献
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【3】Chang K-M,Liu X.Effect of γ′ content on the mechanical behavior of the WASPALOY alloy system[J].Materials Science and Engineering A,2001,308:1-8.
【4】Liu X,Kang B,Chang K-M.The effect of hold-time on fatigue crack growth behaviors of WASPALOY alloy at elevated temperature[J].Materials Science and Engineering A,2003,340:8-14.
【5】李志雄,张 涌.33MW烟气轮机的技术特点及高温合金材料选用[J].炼油技术与工程,2004,34(11):44-47.
【6】Sundman B,Jansson B,Anderson J O.The thermo-calc databank system[J].CALPHAD,1985,9(2):153-190.
【7】Martin J W,Doherty R D.金属系显微结构的稳定性[M].李新立,译.北京:科学出版社,1984.
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