Metals (Sep 2020)

Development and Application of High-Temperature Constitutive Model of HNi55-7-4-2 Alloy

  • Qiang Liang,
  • Xin Liu,
  • Ping Li,
  • Ping Ding,
  • Xianming Zhang

DOI
https://doi.org/10.3390/met10091250
Journal volume & issue
Vol. 10, no. 1250
p. 1250

Abstract

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The constitutive model is still not available for theoretical and engineering analysis of HNi55-7-4-2 alloy, which is a new type of wear-resistant brass alloy widely applied to car synchronizer rings and ship condenser tubes etc. In the current investigation, a friction-corrected stress-strain curve was obtained through a hot-compression test to develop the high-temperature constitutive model of HNi55-7-4-2 alloy based on the Hansel–Spittel model. By comparing predicted flow stress and a simulated force-stroke curve with experimental results, the proposed constitutive model was verified. The developed constitutive model was applied to numerically simulate the hot precision forging of a synchronizer ring. The simulation results based on two process plans on material flow and forging defects were validated by process experiment. The Hansel–Spittel high-temperature constitutive model proposed in this work enables the theoretical and engineering analysis of HNi55-7-4-2 alloy.

Keywords