锻压技术

TC系列钛合金锻造及组织性能调控工艺研究进展

英文标题：Research progress on forging and control technology of microstructure and performance for TC series titanium alloys

作者：蔺永诚1 2 肖逸伟1 2 丁永峰3 张晓泳4 姜玉强1 2 周科朝4

单位：1. 中南大学机电工程学院 2. 高性能复杂制造国家重点实验室 3. 湖南金天钛业科技有限公司 4. 中南大学粉末冶金国家重点实验室

关键词：钛合金热变形热处理微观组织本构模型

分类号：TG316; TG156; TG335

出版年,卷(期):页码：2021,46(9):0-0

摘要：

TC系列钛合金是航空航天飞机关键零部件制造的重要材料。主要综述了近年来笔者团队在TC系列典型钛合金的高温流变行为与本构描述、热变形的微观组织/织构演变规律、热加工工艺窗口的优化及微观组织的调优技术方面的研究进展。结果表明：初始组织对TC系列钛合金流变行为及变形机制的影响显著；TC系列钛合金的高温流变行为表征模型主要有唯象学本构模型、基于物理机制本构模型和机器学习模型；双道次热压缩能够提高TC系列钛合金的α相球化率和β相再结晶程度；通过优化TC系列钛合金的热成形加工工艺，能够有效地避免变形出现流动失稳与成形缺陷；TC系列钛合金热成形过程中微观组织演变的多尺度模拟、热成形-固溶处理-时效处理对组织性能的综合影响机制及规律有待深入研究。

TC series titanium alloys are the key materials for the critical components of aerospace equipment. It mainly reviews the recent research process on the high temperature rheological behaviors, constitutive description, microstructure/texture evolution laws of hot deformation. Hot working process window optimization and optimization technology for microstructures of typical TC series titanium alloys. The results show that, the effects of initial microstructures on the rheological behavior and deformation mechanisms are significant. The phenomenological constitutive model, physically-based model and machine learning model can be used to describe the high temperature rheological behavior of TC series titanium alloys. The spheroidization rate of α phase and the dynamic recrystallization extent of β phase for TC series titanium alloys can be promoted by two-pass hot compression. The flow instabilities and forming defects can be avoided through the optimized hot forming process for TC series titanium alloys. The multi-scale simulation and the effects of hot forming-solution-aging processes on the microstructures properties should be further studied for the microstructure evolution of TC series titanium alloys during hot forming.

基金项目：

国家自然科学基金资助项目（51775564）

蔺永诚(1976-)，男，博士，教授 E-mail：yclin@csu.edu.cn

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