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Hot deformation characteristics and kinetics analysis for Nickel-based corrosion resistant alloy
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  • Lei Wang,
  • Feng Liu,
  • Hongyuan Chen,
  • Qiang Chi
Lei Wang
CNPC Tubular Goods Research Institute

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Feng Liu
Northwestern Polytechnical University
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Hongyuan Chen
CNPC Tubular Goods Research Institute
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Qiang Chi
CNPC Tubular Goods Research Institute
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The hot deformation characteristics of Nickel-based corrosion resistant alloy was studied in the temperature range of 1050~1200oC and the strain rate range of 0.001~0.1s-1 by employing hot compression tests. The results show that the peak stress increases with decreasing temperature and increasing strain rate, and the activation energy is about 409kJ/mol. Basing on the Avrami equation through using the critical strain (εc) and the strain for 50% DRX (ε0.5), a kinetic model for dynamic recrystallization (DRX) was established, where the model parameters could be obtained using the modified Zener-Hollomon parameter (Z*). Applying the model, the predicted value of the steady state strain (εss) and the strain for maximum softening rate (εm) agree well with the experimental results. Accordingly, the relationship between ε m and ε 0.5 is established, which is mainly dependent on the Avrami exponent (n). When n <3.25, εm becomes less than ε0.5 and the difference in between decreases with increasing the strain rate or decreasing the deformation temperature. Finally, through observing DRX microstructure under different deformation conditions, a power law relation between DRX grain size (Ddrx) and Z*, with an exponent of -0.36, was found.
01 Jun 2020Submitted to Engineering Reports
03 Jun 2020Submission Checks Completed
03 Jun 2020Assigned to Editor
04 Jun 2020Reviewer(s) Assigned
14 Jul 2020Editorial Decision: Revise Minor
29 Sep 20201st Revision Received
30 Sep 2020Submission Checks Completed
30 Sep 2020Assigned to Editor
30 Sep 2020Editorial Decision: Accept
03 Dec 2020Published in Engineering Reports. 10.1002/eng2.12323