Authors: Jun Cai Ying Lei Kuaishe Wang Xiaolu Zhang Chengpeng Miao Wenbing Li
Publish Date: 2016/03/18
Volume: 25, Issue: 5, Pages: 1952-1963
Abstract
True stress and true strain data obtained from isothermal compression tests on a Gleeble3800 thermomechanical simulator in a wide range of temperatures 10731323 K and strain rates 000110 s−1 has been used to evaluate the material constants of two constitutive models the modified ZerilliArmstrong and the strain compensation Arrheniustype models Furthermore a comparative study was conducted on the capabilities of the two models in order to represent the elevated temperature flow behavior of BFe1012 cupronickel alloy The suitability levels of these two models were evaluated by comparing the accuracy of their predictions of deformation behavior correlation coefficient R average absolute relative error AARE relative errors of prediction and the number of material constants The results show that the predicted values of these two models agree well with the experimental values of BFe1012 cupronickel alloy except at the temperature of 1123 K and the strain rate of 1 s−1 Meanwhile the strain compensated Arrheniustype model can track the deformation behavior of BFe1012 cupronickel alloy more accurately throughout the entire temperature and strain rate range while fewer material constants are involved in the modified ZerilliArmstrong modelThe authors gratefully acknowledge the financial support received from Planned Scientific Research Project of Education Department of Shaanxi Provincial Government 15JS056 Preresearch Foundation of Jinchuan companyXi’an University of Architecture and Technology Innovation Team Project of “Processing and Preparation for Highperformance Nonferrous Metal Materials” of Xi’an University of Architecture and Technology and Talents Science Fund of Xi’an University of Architecture and Technology RC1369
Keywords: