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杨金龙,朱晓闽,谭建均,熊江英.氩气雾化制粉FGH97高温合金组织和性能研究[J].稀有金属材料与工程(英文),2019,48(12):4093~4100.[Yang Jinlong,Zhu Xiaomin,Tan Jianjun and Xiong Jiangying.Study on Microstructure and Properties of Argon Atomization FGH97 P/M Superalloy[J].Rare Metal Materials and Engineering,2019,48(12):4093~4100.]
Study on Microstructure and Properties of Argon Atomization FGH97 P/M Superalloy
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Received:September 06, 2018  Revised:November 02, 2018
DOI:
Key words: FGH97 P/M superalloy  Argon Atomization  Hot Isostatic Pressure  Microstructure  Properties
Foundation item:广东省珠江人才计划项目和深圳市科技创新委员会项目(项目号KQTD2015032716463668)
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Yang Jinlong,Zhu Xiaomin,Tan Jianjun and Xiong Jiangying  
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Abstract:
      Characteristics of microstructure, inclusions, Prior Particle Boundary , Thermally Induced Porosity , defects and several large size disk′s tensile properties, stress rupture life ,low cycle fatigue of a P/M superalloy FGH97, which was made by Argon Atomization (AA) + Hot Isostatic Pressing (HIP)process, were investigated. The results reveal that the grain size of FGH97 material prepared by AA + HIP +Heat Treatment is ASTM 8-9. No continuous network PPB is found, and there is a very small amount of TIP. The size of mostly square γ' is about 200 nm, and grain boundary γ' is 1.5 to 2 μm. No coarse γ' phase and coarse carbides are observed. The average stress rupture time of 650 °C / 980MPa is 449 h. The maximum low cycle fatigue life is 258,909 cycles at 650 ℃, the average cycle reaches 19,014 cycles. The room temperature, 650℃, 750 ℃tensile properties, stress reputure performance at 650 ℃ / 980 MPa and the fracture life of Low cycle fatigue at 650 ℃ meet the FGH97 alloy technical requirements.