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ZHANG Shanglin, XUAN Fuzhen, QIU Yang, XIE Guofu, LI Guodong. Cyclic Deformation Behavior of P92 Steel under Creep-Fatigue Interaction[J]. Materials and Mechanical Engineering, 2022, 46(5): 36-41. DOI: 10.11973/jxgccl202205006
Citation: ZHANG Shanglin, XUAN Fuzhen, QIU Yang, XIE Guofu, LI Guodong. Cyclic Deformation Behavior of P92 Steel under Creep-Fatigue Interaction[J]. Materials and Mechanical Engineering, 2022, 46(5): 36-41. DOI: 10.11973/jxgccl202205006
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Cyclic Deformation Behavior of P92 Steel under Creep-Fatigue Interaction

  • 1. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, China;

  • 2. School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China

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  • Received Date: February 06, 2021
  • Revised Date: March 30, 2022
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    • Abstract
  • Creep-fatigue test was conducted on P92 steel at 625℃. The effects of strain amplitude (0.4%-1.4%) and holding time (30-300 s) on cyclic deformation behavior of P92 steel were analyzed, and micro-mechanism under creep-fatigue interaction was discussed and compared by low-cycle fatigue tests. The results show that creep-fatigue interaction caused the transformation from non-Masing property to Masing property of P92 steel, and stress relaxation during holding time led to accelerated cyclic softening under creep-fatigue loading. During fatigue process, the microstructure of P92 steel changed inhomogeneously, the dislocation density decreased, and finally an elongated subgrain structure was formed. During creep-fatigue process, the microstructure change and dislocation density decrease of P92 steel were more uniform and significant, and finally equiaxed subgrains or dislocation cell structures were formed, accompanied by the coarsening of precipitates.
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    • References (13)
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