TC4钛合金压缩变形的热激活行为与组织演变

doi:10.13251/j.issn.0254-6051.2026.02.039

金属热处理 ›› 2026, Vol. 51 ›› Issue (2): 266-271.DOI: 10.13251/j.issn.0254-6051.2026.02.039

TC4钛合金压缩变形的热激活行为与组织演变

李冰悦^1,2,3, 周燎¹, 潘海林¹, 欧平^1,2,3, 王和斌⁴, 古美蓉⁵, 尹彩流^1,2,3, 蒙洁丽^1,2,3

1.广西民族大学材料与环境学院, 广西南宁 530105;
2.广西先进结构材料与碳中和重点实验室, 广西南宁 530105;
3.广西高校环境友好材料及生态修复重点实验室, 广西南宁 530105;
4.江西理工大学材料科学与工程学院, 江西赣州 341000;
5.中国科学院赣江创新研究院, 江西赣州 341000

收稿日期:2025-09-21 修回日期:2026-01-04 发布日期:2026-03-05
通讯作者: 欧平,副教授,博士,E-mail:opyp@163.com
作者简介:李冰悦(2001—),女,硕士研究生,主要研究方向为金属材料的强韧化,E-mail:812134644@qq.com。
基金资助:
广西科技重大专项(桂科AA24206065,AA23062026);江西省重点研发计划(20223BBE51017)

Thermal activation behavior and microstructure evolution of TC4 titanium alloy during compression deformation

Li Bingyue^1,2,3, Zhou Liao¹, Pan Hailin¹, Ou Ping^1,2,3, Wang Hebin⁴, Gu Meirong⁵, Yin Cailiu^1,2,3, Meng Jieli^1,2,3

1. School of Materials and Environment, Guangxi Minzu University, Nanning Guangxi 530105, China;
2. Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization, Nanning Guangxi 530105, China;
3. Guangxi Colleges and Universities Key Laboratory of Eco-friendly Materials and Ecological Restoration, Nanning Guangxi 530105, China;
4. School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi 341000, China;
5. Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou Jiangxi 341000, China

Received:2025-09-21 Revised:2026-01-04 Published:2026-03-05

摘要/Abstract

摘要： 利用MMS-100型热力模拟试验机对TC4钛合金在温度为750~900 ℃和应变速率分别为0.1和1 s^-1的条件下进行热压缩试验,根据金属热激活变形理论探讨了该合金压缩变形过程的热激活行为,并分析了压缩变形后合金的组织演变。结果表明,温度下降或应变速率加快均可使TC4钛合金压缩变形的流变应力增大。各个温度不同应变下的激活体积分析显示,在热变形过程TC4钛合金塑性变形的微观机制由位错克服林位错逐渐转变为位错克服Peierls-Nabarro力以及发生交滑移,温度越高则微观机制为由位错克服林位错所控制的应变范围就越小。TC4钛合金的动态再结晶随着温度升高或应变速率降低而增强,从而促使合金由片层状的原始组织逐渐转变为等轴组织。

关键词: TC4钛合金, 热变形, 激活体积, 组织演变

Abstract: Hot compression test of the TC4 titanium alloy was carried out by using the MMS-100 thermal mechanical simulator at 750-900 ℃ and 0.1-1 s^-1. The thermal activation behavior of the alloy during compression deformation was explored based on the theory of metal thermal activation deformation, and the microstructure evolution after compression deformation was also analyzed. The results show that both a decrease in temperature and an increase in strain rate can enhance the flow stress of the TC4 titanium alloy during compression deformation. The analysis of activation volume under different temperatures and true strains indicates that the microscopic mechanism of plastic deformation in the TC4 titanium alloy during hot deformation gradually changes from dislocation overcoming forest dislocation to dislocation overcoming Peierls-Nabarro force and cross slip. The higher the temperature, the smaller the strain range controlled by dislocation overcoming forest dislocation in the microscopic mechanism of plastic deformation. Dynamic recrystallization of the TC4 titanium alloy is promoted by both elevated temperature and reduced strain rate, thereby promoting the alloy to gradual transformation from a lamellar original structure to an equiaxed structure.

Key words: TC4 titanium alloy, hot deformation, activation volume, microstructure evolution

中图分类号:

TG146.23

李冰悦, 周燎, 潘海林, 欧平, 王和斌, 古美蓉, 尹彩流, 蒙洁丽. TC4钛合金压缩变形的热激活行为与组织演变[J]. 金属热处理, 2026, 51(2): 266-271.

Li Bingyue, Zhou Liao, Pan Hailin, Ou Ping, Wang Hebin, Gu Meirong, Yin Cailiu, Meng Jieli. Thermal activation behavior and microstructure evolution of TC4 titanium alloy during compression deformation[J]. Heat Treatment of Metals, 2026, 51(2): 266-271.

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TC4钛合金压缩变形的热激活行为与组织演变

Thermal activation behavior and microstructure evolution of TC4 titanium alloy during compression deformation

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