材料工程2024，Vol.52Issue(7)：140-151,12.DOI:10.11868/j.issn.1001-4381.2023.000373
超温及应力条件下IC10合金的组织演化及机理
Microstructure evolution and mechanism of IC10 alloy under over-temperature and stress condition
刘明坤 1王威 2吴云胜 3佟文伟 1秦学智 3周兰章3
作者信息
- 1. 中国航发沈阳发动机研究所 材料应用研究室,沈阳 110015
- 2. 中国航发沈阳发动机研究所 强度设计研究室,沈阳 110015
- 3. 中国科学院金属研究所 师昌绪先进材料创新中心 高温结构材料研究部,沈阳 110016||中国科学院金属研究所 中国科学院核用材料与安全评价重点实验室,沈阳 110016
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摘要
Abstract
The microstructure evolution under over-temperature(1070-1250℃)and tensile/compressive stress(30-90 MPa)conditions of IC10 alloy was analyzed to simulate the alloy deterioration process during over-temperature operation of gas turbine blades.The results show that the degeneration of secondary γ'phase in IC10 alloy during thermal exposure without stress includes spheroidizing,coarsening,and redissolution.As thermal exposure temperature and time increase,the shape of secondary γ'phase transforms from flower-like to rounded cubic and spherical,driven by the decrease of γ/γ'phase interface energy.The area fraction of secondary γ'phase decreases with the increase in temperature and the prolonging of time.The secondary γ'phase is completely redissolved after thermal exposure at 1225-1250℃for more than 50 h.The size of secondary γ'phase increases with the increase in temperature and time.The coarsening of γ'phase conforms to the Lifshitz-Slozov-Wagner theory controlled by diffusion.Under the overtemperature and stress condition,the rafting of γ'phase gradually intensifies with the increase of temperature.The tensile stress promotes the N-type rafting of γ'phase perpendicular to the stress axis,while the compressive stress promotes the P-type rafting of γ'phase parallel to the stress axis.The γ'phase rafting process is faster under the tensile stress state than under the compressive stress.The microstructure of IC10 alloy under over-temperature and stress conditions can be used to evaluate the service conditions of the blade after service.关键词
IC10合金/超温/热暴露/组织演化/筏化/高温合金Key words
IC10 alloy/over-temperature/thermal exposure/microstructure evolution/rafting/superalloy分类
矿业与冶金引用本文复制引用
刘明坤,王威,吴云胜,佟文伟,秦学智,周兰章..超温及应力条件下IC10合金的组织演化及机理[J].材料工程,2024,52(7):140-151,12.
