Effect of pulse magnetic field aging treatment on microstructure and properties of A356 aluminum alloy

doi:10.13251/j.issn.0254-6051.2024.04.022

Abstract

Abstract: Effects of pulse magnetic field aging with different frequencies on microstructure and mechanical properties of A356 alloy were investigated by using metallographic microscope (OM), field emission scanning electron microscope (SEM), transmission electron microscope (TEM) and universal testing machine. The results show that compared with 0 Hz aging treatment, the microstructure and mechanical properties of the alloy are improved by pulse magnetic field aging with different frequencies. When the pulse magnetic field frequency is 60 Hz, the tensile strength and yield strength of the alloy reach 358 MPa and 278 MPa, respectively, where the required aging treatment time is 570 min shorter than that of the factory T6 heat treatment process under the premise of meeting the technical requirements of the factory. It is found that after pulse magnetic field aging with different frequencies, the alloy owns different Gibbs free energy and diffusion rate, the size and morphology of the grains, eutectic Si and Si particles are changed, thus the comprehensive properties of the alloy are affected.

Key words: A356 aluminum alloy, magnetic field frequency, microstructure, mechanical properties

CLC Number:

TG146.21

Zhai Pengfei, Pan Hao, Xing Shuqing, Gong Meina, Liu Yongzhen, Ma Yonglin. Effect of pulse magnetic field aging treatment on microstructure and properties of A356 aluminum alloy[J]. Heat Treatment of Metals, 2024, 49(4): 138-145.

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