Thermal Deformation Behavior and Constitutive Equation of Highly Alloyed Superalloy Udimet720Li

Abstract:

Hot compressive deformation of Udimet720Li alloy was carried out on Gleeble-3500 thermal mechanical simulator. The flow stress behavior of Udimet720Li alloy during hot compression was studied in the temperature range of 1100-1160 and at a strain rate of 0.001-1s ^-1. The results showed that the flow stress was controlled by both strain rate and deforming temperature. The flow stress decreased with the increase of deforming temperature, while increased with the increase of strain rate. The change of flow stress with deformation thermal parameters was revealed from true stress-true strain curves, and constitutive relationship of Udimet720Li alloy was obtained on the base of Arrhenius equations and the deformation activation energy was calculated.

• Periodical: Materials Science Forum (Volumes 747-748)
• Pages: 703-708
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.747-748.703
• Online since: February 2013
• Authors: Tao Wang, Shu Hong Fu, Zhao Li, Yong Zhang, Yu Xin Zhao, Ling Guo
• Keywords: Constitutive Equation, Deformation Activation Energy, Deformation Behavior, Isothermal Compression, Udimet 720Li Alloy

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