Hot Tensile Deformation and Fracture Behavior of a Nitrogen Alloyed Ultralow Carbon Austenitic Stainless Steel

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  • Yang Xiaoya
    State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
  • He An
    State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
  • Li Shilei
    State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
  • Zhang Hailong
    State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
  • Wang Xitao
    State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing

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The hot tensile deformation and fracture behavior of a nitrogen alloyed ultralow carbon austenitic stainless steel were studied by a Gleeble-1500D thermo-mechanical simulator with the temperature range of 1173–1473 K and strain rate range of 0.01–1 s−1. Microstructural evolution was analyzed in terms of fractography at various deformation temperatures and strain rates. The tensile true stress-true strain curves after necking were calculated by the heuristic method. The fracture threshold values of the studied steel were estimated by finite element method (FEM). The final load-stroke curves obtained from the FEM simulation were found to have a good agreement with the experimental load-stroke curves. The quantitative relationship between fracture threshold value and Zener-Hollomom parameter was also established. The results are beneficial to the understanding of hot deformation behavior of a wide range of stainless steels.

収録刊行物

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 56 (12), 1984-1991, 2015

    公益社団法人 日本金属学会

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