锻压技术

多向压缩与退火处理对TA2工业纯钛力学性能的影响

英文标题：Influence of multi-directional compression and annealing treatment on mechanical properties for TA2 industrial pure titanium

作者：陈荣友1 2 莫俊财1 2 赵小莲1 2 3 梁维1 2 黄岳雨1 2 宋洋1 2 郭书博1 2 韦春华1 2 3

单位：1.广西大学省部共建特色金属材料与组合结构全寿命安全国家重点实验室 2.广西大学资源环境与材料学院 3.广西大学广西高校高性能结构材料及热表加工重点实验室

关键词：TA2纯钛多向压缩退火处理抗拉强度断口形貌

分类号：TG319;TG166.2

出版年,卷(期):页码：2024,49(4):214-218

摘要：

为改善TA2纯钛的力学性能，对粗晶TA2纯钛试样进行多向压缩和退火处理，通过透射电镜微观组织观察、纳微压痕硬度测试、室温拉伸测试及扫描电镜断口形貌观测等手段，对比了粗晶试样、多向压缩试样和不同温度退火试样的组织、硬度、拉伸性能及断口形貌。结果表明：粗晶试样经多向压缩后，晶粒由45 μm细化至约200 nm，抗拉强度提升了73.3%，拉伸断口观察到数量少且深度浅的韧窝。当退火温度低于400 ℃时，多向压缩试样的晶粒未明显生长，仍保持良好的综合力学性能。随着退火温度升高，拉伸断口的韧窝数目增多且深度变深；当退火温度为500 ℃时，晶粒生长，抗拉强度及硬度快速下降，伸长率大幅提升。

In order to improve the mechanical properties of TA2 pure titanium, the multi-directional compression and annealing treatment was carried out on the coarse grain TA2 pure titanium samples, and the microstructures, hardness, tensile properties and tensile fracture morphologies of coarse grain samples, multi-directional compression samples and annealed samples at different temperatures were compared by means of transmission electron fracture morphology observation, micro-nano indentation hardness test, tensile test at room temperature and scanning electron microscope fracture morphology observation. The results show that after multi-directional compression of coarse grain samples, the grain size is refined from 45 μm to 200 nm, the tensile strength is increased by 73.3%, and there are less and shallower dimples obtained in the tensile fracture. When the annealing temperature is below 400 ℃, the grains of multi-directional compression samples do not grow obviously, and the mechanical properties are kept at a high level. With the increasing of annealing temperature, the number of dimples on the tensile fracture is increased and the depth of dimples is deepened. When the annealing temperature is 500 ℃, the grain grows, the tensile strength and hardness are decreased rapidly and the elongation is greatly improved.

基金项目：

国家自然科学基金资助项目（51561003）；广西高校高性能结构材料及热表加工重点实验室开放基金项目（HPSMT-SP202303）

作者简介：陈荣友（1999-），男，硕士研究生 E-mail：709028670@qq.com 通信作者：韦春华（1984-），男，博士，讲师 E-mail：weichunhua@gxu.edu.cn

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