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NIE Xiaoqian, ZHANG Chengcheng, WANG Runzi, ZHANG Xiancheng, TU Shantong. Creep-Fatigue Interaction Behavior of Powder Metallurgy Nickel-Based Superalloy FGH96[J]. Materials and Mechanical Engineering, 2019, 43(6): 8-11,17. DOI: 10.11973/jxgccl201906002
Citation: NIE Xiaoqian, ZHANG Chengcheng, WANG Runzi, ZHANG Xiancheng, TU Shantong. Creep-Fatigue Interaction Behavior of Powder Metallurgy Nickel-Based Superalloy FGH96[J]. Materials and Mechanical Engineering, 2019, 43(6): 8-11,17. DOI: 10.11973/jxgccl201906002
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Creep-Fatigue Interaction Behavior of Powder Metallurgy Nickel-Based Superalloy FGH96

  • 1. Key Laboratory of Pressurized System and Safety, East China University of Science and Technology, Shanghai 200237, China;

  • 2. Shanghai Engineering Research Center for Commercial Aircraft Engine, AECC Commercial Aircraft Engine Co., Ltd., Shanghai 201108, China

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  • Received Date: March 27, 2018
  • Revised Date: March 24, 2019
    Graphical Abstract
    • Abstract
  • Fatigue test without load-holding and creep-fatigue tests with load-holding at maximum tension/compression strains were conducted on domestic powder metallurgy nickel-based superalloy FGH96 under total strain control at 650℃. The failure life and failure mode of the alloy were studied, and the failure life was compared with that of as-cast nickel-based superalloy GH4169. The results show that the introduced load-holding process reduced the failure life of the FGH96 superalloy. Compared with load-holding at maximum tension strain, the creep damage produced during load-holding at the maximum compression strain was larger, resulting in a shorter failure life. The fatigue failure lives of FGH96 superalloy were higher than those of GH4169 superalloy, and the creep-fatigue failure lives were lower than those of GH4169 superalloy at relatively high strain amplitude (larger than 1.4%), while the opposite was true at relatively low strain amplitude (lower than 1.4%). The fatigue fracture and creep-fatigue fracture of FGH96 superalloy both showed mutiple crack initiation failure characteristics on surface or near surface.
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