| Effects of rejuvenation heat treatment on microstructure and creep property of a Ni-based single crystal superalloy |
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| 作者姓名： | K.J.Tan X.G.Wang J.J.Liang J.Meng Y.Z.Zhou X.F.Sun |
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| 作者单位： | Superalloys Division,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Department of Materials Science and Engineering,University of Science and Technology of China,Hefei 230026,China;Superalloys Division,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Superalloys Division,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Superalloys Division,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Superalloys Division,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Superalloys Division,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China |
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| 基金项目： | the Chinese Academy of Sciences and State Key Lab of Advanced Metals and Materials Open Fund ;the Youth Innovation Promotion Association;This work was financially supported by the National Sci-ence and Technology Major Project ;the National Natural Sci-ence Foundation of China ;the National Key R&D Program of China (Nos. 2017YFA0700704. 2018YFB110660 and 2017YFB1103800) |
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| 摘 要： | Both surface and internal microstructures of a second-generation Ni-based single crystal(SX) superalloy were studied after creep and rejuvenation heat treatment(RHT).It is indicated that the microstructures,such as the dislocation network,the γ phase and the γ' phase,can be recovered to those after the standard heat treatment(SHT).It is found that RHT affected zone(RAZ) formed at the surface is composed of theγ'-free layer,the transition layer and the recrystallization(RX),which are less than 20 μm in depth totally.Such depth of the RAZ doesn't affect the properties of the superalloy.The morphology of γ' phase at the RAZ is related to the composition of the elements.The average creep life after RHT is close to the average life after SHT.It is concluded that RHT could effectively repair SX parts and increase the total life of the sample after a damage by creep.
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| 关 键 词： | SUPERALLOYS Rejuvenation heat treatment MICROSTRUCTURE Creep property |
Effects of rejuvenation heat treatment on microstructure and creep property of a Ni-based single crystal superalloy |
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| K.J.Tan,X.G.Wang,J.J.Liang,J.Meng,Y.Z.Zhou,X.F.Sun.Effects of rejuvenation heat treatment on microstructure and creep property of a Ni-based single crystal superalloy[J].Journal of Materials Science & Technology,2021,60(1):206-215. |
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| Authors: | KJTan XGWang JJLiang JMeng YZZhou XFSun |
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| Abstract: | Both surface and internal microstructures of a second-generation Ni-based single crystal (SX) superalloy were studied after creep and rejuvenation heat treatment (RHT). It is indicated that the microstructures, such as the dislocation network, theγphase and theγ' phase, can be recovered to those after the standard heat treatment (SHT). It is found that RHT affected zone (RAZ) formed at the surface is composed of theγ'-free layer, the transition layer and the recrystallization (RX), which are less than 20μm in depth totally. Such depth of the RAZ doesn't affect the properties of the superalloy. The morphology ofγ' phase at the RAZ is related to the composition of the elements. The average creep life after RHT is close to the average life after SHT. It is concluded that RHT could effectively repair SX parts and increase the total life of the sample after a damage by creep. |
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| Keywords: | Superalloys Rejuvenation heat treatment Microstructure Creep property |
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