陕西科技大学学报2025，Vol.43Issue(3)：150-157,8.
钛基复合材料热变形的本构模型研究
Research on constitutive model of titanium matrix composites during thermal deformation
摘要
Abstract
Titanium matrix composite(TMCs)is a kind of material by introducing reinforced phase into pure titanium or titanium alloy matrix to improve the material properties.For TMCs,hot compression experiments were conducted on a Gleeble 3500 dynamic/thermal simulation testing machine.The thermal deformation behavior of TMCs was studied under deformation temperatures of 750 ℃～900 ℃ and strain rates of 0.01～10 s-1.Based on the experimental data,strain compensated Arrhenius and BP neural network constitutive models were established to predict the high-temperature flow behavior of titanium matrix compos-ites.The results indicate that TMCs have both positive strain rate and negative temperature sensitivity.As the deformation begins,the flow stress rapidly increases to the peak stress,and then the hardening and softening effects gradually reach equilibrium.Meanwhile,the flow stress slowly decreases and also achieves steady state.Compared to the strain compensation constitutive model,the BP neural network constitutive model has a higher prediction accura-cy,therefore it is more suitable for accurately predicting the flow stress of TMCs.关键词
钛基复合材料/热变形行为/本构模型/BP神经网络Key words
titanium matrix composites/thermal deformation behavior/constitutive model/BP neural network分类
通用工业技术引用本文复制引用
王贤贤,加鑫,吴文豪,赵雪妮..钛基复合材料热变形的本构模型研究[J].陕西科技大学学报,2025,43(3):150-157,8.基金项目
国家自然科学基金项目(52005313) （52005313）
陕西省自然科学基础研究计划一般项目(2025JC-YBQN-751) （2025JC-YBQN-751）
陕西省科技创新团队计划项目(2023CXTD16) （2023CXTD16）
陕西科技大学博士科研启动基金项目(2021BJ02) （2021BJ02）
