[成形过程仿真优化与集成计算材料工程]钛合金热成形工艺形变与组织演变耦合多尺度仿真研究进展

doi:10.3969/j.issn.1004-132X.2020.22.004

摘要/Abstract

摘要： 讨论了钛合金高温变形晶体塑性有限元模拟的研究进展，并分析了晶体塑性模型在钛合金细观尺度不均匀变形和组织演化方面的应用；围绕钛合金热成形过程变形与组织演变耦合模拟需求，讨论了钛合金高温成形统一黏塑性本构模型的发展过程，并介绍了统一黏塑性本构模型在钛合金热成形工艺的应用实例。统一黏塑性本构模型考虑了钛合金高温变形过程中回复、再结晶、相变、损伤等组织演变行为与宏观应力应变之间的耦合作用，为实现钛合金构件形状尺寸和组织性能的精确预测和成形工艺优化提供了有效的手段。最后分析了钛合金热成形工艺多尺度建模仍存在的问题，并展望了多尺度建模的发展趋势。

关键词: 钛合金, 多尺度模拟, 热成形, 晶体塑性模型, 统一黏塑性本构模型

Abstract: Firstly, the research progresses in finite element simulation of titanium alloy high temperature deformation crystal plasticity were discussed, the applications of crystal plasticity model in the microscopic nonuniform deformation behaviors and microstructure evolution of titanium alloy were analyzed. Then the development of unified viscoplastic constitutive models was discussed around the requirements of the coupling simulation of deformations and microstructure evolution of titanium alloy in hot forming processes. And some application examples of titanium alloy hot forming were introduced. The coupling effects among the flow stress and microstructure parameters such as dynamic recovery, dynamic recrystallization, phase transformation and damage were included in the unified viscoplastic constitutive models. The simulations with unified viscoplastic constitutive models provide an effective method for the shape and microstructure predictions of titanium alloy components during hot forming. Finally, the problems of multi-scale simulation of hot forming for titanium alloy were analyzed, and the future development trends were prospected.

Key words: titanium alloy, multi-scale simulation, hot forming, crystal plasticity model, unified viscoplastic constitutive model

中图分类号:

刘志强, 赵杰, 王克环, 武永, 吕良星, 刘钢, 苑世剑, . [成形过程仿真优化与集成计算材料工程]钛合金热成形工艺形变与组织演变耦合多尺度仿真研究进展[J]. 中国机械工程, DOI: 10.3969/j.issn.1004-132X.2020.22.004.

LIU Zhiqiang, ZHAO Jie, WANG Kehuan, WU Yong, LYU Liangxing, LIU Gang, YUAN Shijian, . Research Progresses on Coupling Multi-scale Simulation of Deformation and Microstructure Evolution of Titanium Alloy in Hot Forming Processes[J]. China Mechanical Engineering, DOI: 10.3969/j.issn.1004-132X.2020.22.004.

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