考虑相变的晶体塑性有限元模型开发及验证  

Development and verification of crystal plasticity finite element model considering phase transformation

作　　者：杨浩 唐伟琴[2] 李大永[2] YANG Hao;TANG Wei-qin;LI Da-yong(Hefei General Machinery Research Institute Co.,Ltd.,Hefei 230061,China;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]合肥通用机械研究院有限公司,安徽合肥230061 [2]上海交通大学机械与动力工程学院,上海200240

出　　处：《塑性工程学报》2025年第4期169-180,共12页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(U2141215);合肥通用机械研究院有限公司博士科技基金资助项目(2023010792)。

摘　　要：为从理论角度研究变形诱发马氏体相变规律,将相变机制与位错滑移机制结合,从单晶层面建立了考虑相变的晶体塑性本构模型,通过有限元法将单晶耦合,建立了考虑相变的多晶体塑性有限元模型。基于原位中子衍射实验结果,通过模拟退火法可以有效标定模型的硬化参数和相变参数。结果表明,该模型能够有效复现QP1180钢塑性变形过程中的宏观应力-应变曲线和微观结构演化,如残余奥氏体体积分数演化、各相不同晶面晶格应变和衍射强度演化,并且能够预测各相的织构演化。此外,通过建立不同相分布和网格数量的代表体积元模型,还验证了模拟结果具有相随机分布和网格无关性。To study the laws of deformation-induced martensitic transformation from the theoretical point,the phase transformation mechanism was combined with the dislocation slip mechanism.The crystal plastic constitutive model considering phase transformation was established from the single crystal level,and the plastic finite element model of polycrystal considering phase transformation was established by coupling single crystal with finite element method.Based on the results of in situ neutron diffraction experiments,the hardening parameters and phase transformation parameters of the model can be effectively calibrated by simulated annealing method.The results show that the model can effectively reproduce the macroscopic stress-strain curves and microstructure evolutions of QP1180 steel during plastic deformation,such as the volumetric evolution of residual austenite,the evolution of lattice strain in different crystal faces and diffraction intensity of each phase,and and the texture evolution of each phase can be predicted.In addition,the simulation results are verified by random phase distribution and grid independence by establishing the representative volume element models with different phase distributions and grid numbers.

关 键 词：晶体塑性 马氏体相变 晶格应变 衍射强度 织构 

分 类 号：O34[理学—固体力学]