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Constitutive Model for Molybdenum-Niobium Alloy During Hot Deformation

  • Wen Zhang
  • Xuanqiao Gao
  • Jun Cheng
  • Laiping Li
  • Zhongwu Hu
  • Bin Zhao
  • Pingxiang Zhang
Conference paper

Abstract

Isothermal compression of the molybdenum-niobium alloy was conducted on a Gleeble-3800 thermal simulator at the deformation temperature range of 1100–1300 °C with strain rates ranging from 0.001 to 10 s−1 and height reduction of 50%. The results show that the deformation temperature and strain rate affected the flow stress during the thermal deformation of molybdenum-niobium alloy significantly. The true stress–strain curves exhibit a peak flow stress, flow softening and steady flow behavior. The activation energy (\( Q \)) and stress exponent (\( n \)) of molybdenum-niobium alloy, are calculated. The constitutive equation is established based on a hyperbolic-sine equations of Arrhenius type.

Keywords

Molybdenum-niobium alloy Constitutive model Hot compression 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Wen Zhang
    • 1
    • 2
  • Xuanqiao Gao
    • 2
  • Jun Cheng
    • 2
  • Laiping Li
    • 2
  • Zhongwu Hu
    • 2
  • Bin Zhao
    • 2
  • Pingxiang Zhang
    • 1
    • 2
  1. 1.Northwestern Polytechnical UniversityXi’anPeople’s Republic of China
  2. 2.Northwest Institute for Nonferrous Metal ResearchXi’anPeople’s Republic of China

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