Transactions of Materials and Heat Treatment

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

Authors： Chen Rongyou1 2 Mo Juncai 1 2 Zhao Xiaolian 1 2 3 Liang Wei 1 2 Huang Yueyu 1 2 Song Yang1 2 Guo Shubo 1 2 Wei Chunhua1 2 3

Unit： 1. State Key Laboratory of Featured Metal Materials and Lifecycle Safety for Composite Structures Guangxi University 2. School of Resources Environment and Materials Guangxi University 3. Key Laboratory of High Performance Structural Materials and Thermo-surface Processing Education Department of Guangxi Zhuang Autonomous Region Guangxi University

KeyWords： TA2 pure titanium multi-directional compression annealing treatment tensile strength fracture morphology

ClassificationCode：TG319;TG166.2

year,vol(issue):pagenumber：2024,49(4):214-218

Abstract：

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.

Funds：

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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