Modeling of anisotropic tensile and cyclic viscoplastic behavior of a nickel-base directionally solidified superalloy

作者：Dong Chengli; Yang Xiaoguang; Shi Duoqi^*; Yu Huichen

来源：Materials & Design, 2014, 55: 966-978.

DOI：10.1016/j.matdes.2013.10.085

• Anisotropy
• Directionally solidified
• Constitutive model
• Cyclic viscoplastic
• Rate-dependent

Effects of temperature and crystallographic orientation on tensile and cyclic viscoplastic behavior of a nickel-base directionally solidified superalloy, DZ125, have been experimentally investigated and modeled using a unified anisotropic viscoplastic constitutive model. This constitutive model is compiled as an ABAQUS/UMAT by the self-adaptive explicit integration scheme. A grouping optimization method is proposed to identify the material parameters. The results show that the unified viscoplastic constitutive model is able to characterize the rate-dependent anisotropic tensile and cyclic viscoplastic behavior of DZ125 superalloy and the simulation results are in good agreement with the experimental data.

• 出版日期2014-3
• 单位北京航空航天大学; 中国航发北京航空材料研究院