应用数学和力学2025，Vol.46Issue(5)：563-581,19.DOI:10.21656/1000-0887.450264
铸态TiZrNbV晶体塑性本构模型的参数分析与参数反演
Parametric Analysis and Parameter Inversion of the Crystal Plasticity Constitutive Model for as-Cast TiZrNbV Refractory High Entropy Alloys
摘要
Abstract
Refractory high-entropy alloys(RHEAs)have attracted considerable attention due to their outstand-ing mechanical properties.However,the influence of their microstructural behavior on macroscopic mechanical performance remains poorly understood.With the increase of study on material micromechanical behaviors,the crystal plasticity finite element methods become essential tools for uncovering the underlying mechanisms of crystalline materials.Since crystal plasticity constitutive models involve numerous complex parameters,a thor-ough analysis of these parameters is critical for a deeper understanding of the micromechanical behaviors of al-loys.The crystal plasticity model used in this study incorporates the Peierls stress,which accounts for the short-range potential barriers of the material,thereby enabling a more accurate simulation of its strain-rate be-havior.Through experimental design and range analysis,the key constitutive parameters affecting the alloy's mechanical properties were identified.Univariate analysis was then employed to clarify the specific effects of these critical parameters on the mechanical characteristics of the material.For parameter inversion,an optimi-zation-based approach was developed,combining the support vector regression with optimization algorithms.This method effectively inverts crystal plasticity constitutive parameters from macroscopic mechanical testing data.For the cast TiZrNbV alloy,a set of optimal parameters was successfully inverted,and the agreement be-tween simulation results and experimental data validated the method's effectiveness.This study provides valua-ble insights for predicting the mechanical behaviors,guiding material design,and optimizing the performances of refractory high-entropy alloys.关键词
难熔高熵合金/晶体塑性理论/参数反演/优化设计Key words
refractory high entropy alloy/crystal plasticity theory/parameter inversion/optimization design分类
力学引用本文复制引用
马培源,林玉亮,陈荣..铸态TiZrNbV晶体塑性本构模型的参数分析与参数反演[J].应用数学和力学,2025,46(5):563-581,19.基金项目
国家自然科学基金(12072369 （）
12072368) （）
湖南省杰出青年基金(2022JJ10058) （2022JJ10058）
