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论文类型：期刊论文

发表时间：2013-12-01

发表刊物：MATERIALS & DESIGN

收录刊物：SCIE、EI

卷号：52

页面范围：289-294

ISSN号：0261-3069

关键字：Crystal plasticity; Integration model; Thermal effects; Finite deformation

摘要：An improved integration model based on crystal plasticity is presented to model the thermo-mechanical processes of face-centered-cubic (FCC) polycrystals. In this model, the thermal part of deformation gradient is introduced into the multiplicative decomposition of the total deformation gradient and the plastic deformation gradient is chosen as the basic integration variable. The effects of temperature, temperature changing rate and dissipation of plastic deformation are considered in the finite deformation computation. The obtained plastic deformation gradient includes the plastic deformation as well as the thermal effects. In applications, the mechanical behaviors of 1100 Al in warm forming and 22MnB5 boron steel in hot tensile deformation were computed using this model. In experiments, the hot tensile tests of 22MnB5 boron steel were performed in the isothermal and non-isothermal conditions. The predicted results can reflect the thermal effects in forming process and agree well with the experimental data. (C) 2013 Elsevier Ltd. All rights reserved.