Virtual testing of dual-phase steels: Effect of martensite morphology on plastic flow behavior
Virtual testing of dual-phase steels: Effect of martensite morphology on plastic flow behavior
复制标题
DOI：
10.1016/j.msea.2016.07.118
复制
发表时间：
2016-09
期刊：
影响因子：
6.4
通讯作者：
J. Pagenkopf;A. Butz;M. Wenk;D. Helm
中科院分区：
文献类型：
--
作者：
J. Pagenkopf;A. Butz;M. Wenk;D. Helm
双相钢具有中等的塑性各向异性，这是其基本组织的结果。采用基于全场有限元模拟的数值均匀化方法，研究了马氏体形态对不同方向单向拉伸载荷下双相钢的应力-应变曲线和塑性应变比(r值)的影响。模拟结果表明，马氏体形态影响宏观响应和塑性各向异性程度。如果在模拟中考虑材料的晶体织构和统计上等价的马氏体形态，则可以预测本工作所研究的双相钢(DP600)的力学行为。利用基于统计相关函数的重构过程，建立了相应的双相组织有限元模型。这项研究表明，虚拟测试方法的预测能力强烈依赖于在模拟中表示微结构特征的详细程度。
Dual-phase steels exhibit a moderate plastic anisotropy as a result of the underlying microstructure. A numerical homogenization scheme based on full-field finite element simulations was applied to assess the effect of the martensite morphology on the stress-strain curves and the plastic strain ratios (r-values) of a dual-phase steel under uniaxial tensile loading in different directions. The simulation results show that the martensite morphology affects the macroscopic response and the degree of plastic anisotropy. The mechanical behavior of the dual-phase steel (DP600) investigated in this work could be predicted if the crystallographic texture of the material and a statistically equivalent martensite morphology were considered in the simulations. The corresponding finite element models of the dual-phase microstructure were generated using a reconstruction procedure based on statistical correlation functions. This study demonstrates that the predictive capabilities of the virtual testing approach strongly depend on the level of detail with which the microstructural features are represented in the simulations.