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Microstructure Evolution of a Single Crystal Nickel-Base Superalloy During Heat Treatment and Creep
引用本文:YANGDa-yun JINTao ZHAONai-ren WANGZhi-hui SUNXiao-feng GUANHeng-rong HUZhuang-qi. Microstructure Evolution of a Single Crystal Nickel-Base Superalloy During Heat Treatment and Creep[J]. 材料热处理学报, 2004, 25(5): 80-82
作者姓名:YANGDa-yun JINTao ZHAONai-ren WANGZhi-hui SUNXiao-feng GUANHeng-rong HUZhuang-qi
作者单位:InstituteofMetalResearch,ChineseAcademyofSciences,Shenyang,China
摘    要:Microstructure evolution of a single crystal nickel-base superalloy during heat treatment and tensile creep at 1010℃ and 248 MPa for 30h was observed and analyzed. Internal stresses because of lattice mismatch between γ and γ‘ phase provided the driving force for γ‘ shape evolution during heat treatment. More than 65 vol. % distorted cubic γ‘ phase keeping coherency with the γ matrix precipitated after solution at 1295℃ for 32h. The shape of γ‘ phase was perfectly cubic with increasing precipitate size during the two-step aging treatment. Due to the applied stress and intemal stress field the continuous γ-γ‘ lamellar structure perpendicutar to the apptied stress was fonmed after 30h tensile creep.

关 键 词:显微结构 热处理 拉伸蠕变 单晶镍超级合金

Microstructure Evolution of a Single Crystal Nickel-Base Superalloy During Heat Treatment and Creep
YANG Da-yun JIN Tao,ZHAO Nai-ren,WANG Zhi-hui,SUN Xiao-feng,GUAN Heng-rong,HU Zhuang-qi. Microstructure Evolution of a Single Crystal Nickel-Base Superalloy During Heat Treatment and Creep[J]. Transactions of Materials and Heat Treatment, 2004, 25(5): 80-82
Authors:YANG Da-yun JIN Tao  ZHAO Nai-ren  WANG Zhi-hui  SUN Xiao-feng  GUAN Heng-rong  HU Zhuang-qi
Abstract:Microstructure evolution of a single crystal nickel-base superalloy during heat treatment and tensile creep at1010℃ and 248 MPa for 30h was observed and analyzed. Internal stresses because of lattice mismatch between γ and γphase provided the driving force for γ shape evolution during heat treatment. More than 65 vol. % distorted cubic γ phase keeping coherency with the γ matrix precipitated after solution at 1295 ℃ for 32h. The shape of γ phase was perfectly cubic with increasing precipitate size during the two-step aging treatment. Due to the applied stress and internal stress field the continuous γ-γ lamellar structure perpendicular to the applied stress was formed after 30h tensile creep.
Keywords:nickel-base single crystal   superalloy   microstructure   heat treatment   tensile creep
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