Transactions of Materials and Heat Treatment

Title：Experimental study on surface strengthening of TC4 titanium alloy rods by electromagnetic pulse

Authors： Wang Zhefeng1 Ding Yujie1 Han Jin2 Chen Menghao2 Song He1 Lu Jichen1 Zhao Shuguang2

Unit： 1.Academy of Aeronautics and Astronautics Shenyang Aerospace University 2.AECC Beijing Institute of Aeronautical Materials

KeyWords： TC4钛合金表面形变强化电磁脉冲维氏硬度残余应力

ClassificationCode：TG391

year,vol(issue):pagenumber：2024,49(11):232-240

Abstract：

In order to explore the relevant parameters for surface strengthening of TC4 titanium alloy under the action of electromagnetic pulse, the experiment was carried out, and the experimental results were analyzed by finite element simulation, microhardness tester and optical microscope. Electromagnetic pulse experiments were carried out on the rods with the diameter of Φ10 mm under different voltages and impact times, and whether the driving tube was used. The effect of strengthening was evaluated by measuring Vickers hardness and residual stress and observing microscopic metallography. The experimental results show that using electromagnetic pulse with the voltage of 5-7 kV to strengthen titanium alloy can improve its Vickers hardness, the maximum average Vickers hardness can be increased by more than 15%, and the fine and uniform distribution of β phase can be promoted. Taking the aluminum tube as the driving tube is more conducive to improve the Vickers hardness and residual stress of TC4 titanium alloy, but the driving tube will absorb some energy at the beginning and affect the strengthening effect. The average Vickers hardness of TC4 titanium alloy can be effectively improved by 15 times of impact under 5 kV voltage and 10 times of impact under 6 kV voltage, and the phenomenon of processing softening will occur if the impact times are too many.

Funds：

国家自然科学基金资助项目（52075347）

作者简介：王哲峰（1970-），男，博士，副教授 E-mail：zhefeng_w@126.com 通信作者：丁昱杰（1996-），男，硕士研究生 E-mail：867572516@qq.com

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