Effect of pulsed magnetic field on microstructure and properties of TC18 titanium alloy during aging

doi:10.13251/j.issn.0254-6051.2024.02.032

Abstract

Abstract: A pulsed magnetic field was applied to TC18 titanium alloy during aging, and the effect of pulsed magnetic field on the precipitation behavior of the TC18 titanium alloy was investigated by observing and analyzing the nucleation and growth processes. The effect of pulsed magnetic field on the microstructure, strength and plasticity of the TC18 titanium alloy during the aging process was investigated by means of scanning electron microscope and tensile testing machine. The results show that the application of pulsed magnetic field can significantly increase the precipitation rate of the TC18 titanium alloy and thus shorten the aging time and improve the mechanical properties. Compared to 4 h of aging without pulsed magnetic field, 1 h of aging with pulsed magnetic field can increase elongation of the TC18 titanium alloy by 15%, and the tensile strength is also improved. The aging process of the TC18 titanium alloy is accelerated by the action of pulsed magnetic field, so that it enters the over-aging stage 3 h earlier. During the aging process of the TC18 titanium alloy, the pulsed magnetic field promotes the precipitation and growth of the secondary phases by increasing the diffusion coefficient of the atoms.

Key words: TC18 titanium alloy, heat treatment, microstructure, mechanical properties

CLC Number:

TG146.23

He Xiaoyong, Xing Shuqing, Lang Ruiqing, Liu Yongzhen, Chen Zhongyi, Ma Yonglin. Effect of pulsed magnetic field on microstructure and properties of TC18 titanium alloy during aging[J]. Heat Treatment of Metals, 2024, 49(2): 203-207.

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