锻压技术

铝锂合金形变热处理工艺研究进展

英文标题：Research progress on thermomechanical treatment process for Al-Li alloy

作者：李建军徐佳辉黄亮谢冰鑫

单位：华中科技大学

分类号：TG391

出版年,卷(期):页码：2021,46(11):1-10

摘要：

形变热处理工艺是铝锂合金力学性能的重要调控方式。介绍了铝锂合金以及形变热处理的发展历程和特点。综述了铝锂合金形变热处理的经典阶段，即固溶淬火、预变形和人工时效阶段。描述了不同阶段下材料的微观组织演变特征及其对材料力学性能的影响，包括过饱和固溶体演变、塑性变形诱导位错演变、位错促进析出相形核、析出相演变模型、材料强韧化机制以及力学模型。介绍了耦合多物理场的形变热处理工艺新发展，但是相关影响机制有待进一步研究，相关的析出相演变模型、时效动力学模型有待进一步完善。最后，针对现有研究提出了后续值得继续深入研究的方向。

The thermomechanical treatment (TMT) process is an important way to control the mechanical properties of Al-Li alloy. Therefore, the development history and characteristics of Al-Li alloy and TMT were introduced, and the classic stages of TMT for Al-Li alloy were reviewed, namely, solution quenching, pre-deformation and artificial aging stages. Then, the microstructure evolution of Al-Li alloy at different stages and their influences on the mechanical properties of material were described, including supersaturated solid solution evolution, dislocation evolution induced by plastic deformation, nucleation of precipitated phase promoted by dislocation, precipitated phase evolution model, material strengthening and toughening mechanism and mechanical model. Furthermore, the new development of TMT coupled with multi-physics field was introduced. But the related influence mechanism needed to be further studied, and the related precipitation phase evolution model and aging kinetic model needed to be further improved. Finally, in view of the existing research, the follow-up direction worthy of further research was proposed.

基金项目：

国家自然科学基金面上项目（51975229）；武汉市应用基础前沿项目（2020010601012178）；湖北省重点研发计划项目（2020BAB139）

作者简介：李建军（1964-），男，博士，教授, E-mail：jianjun@hust.edu.cn; 通信作者：黄亮（1981-），男，博士，教授, E-mail：huangliang@hust.edu.cn

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