脉冲磁场孕育处理下A356铝合金凝固组织的演变规律

doi:10.11896/cldb.22100215

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Abstract Based on the self-designed magnetic field grain refinement device, the evolution law of solidification microstructure of A356 aluminum alloy under different frequency of pulsed magnetic field incubation treatment was studied. The solidification structure of A356 aluminum alloy was analyzed by Zeiss microscope (OM), field emission scanning electron microscope (FESEM), X-ray diffractometry (XRD) and differential scanning calorimetry (DSC). The results showed that:under pulsed magnetic field inoculation can reduce nucleation activation energy and the critical nucleation radius, affects the evolution law of the groups above liquidus, makes the size of the groups of watoms is reduced, the number increased, and the smaller the critical dimension on a large number of stable crystal nucleus formation, so as to make the primary α-Al in A356 aluminum alloy solidification organization and eutectic silicon phase significant refinement, compared with the untreated samples, the average size of primary α-Al grains decreases by 39%, and the average size of eutectic silicon decreases by 60%. At the same time, due to the magnetic anisotropy of α-Al grains, the magnetic anisotropy energy and magnetic torque lead to the rotation of α-Al grains, so that the grains grow along the (200) plane preferentially.

Key words： A356 aluminum alloy pulsed magnetic field solidification structure frequency primary α-Al phase

Published: 10 July 2024 Online: 2024-08-01

CLC number:

TF821

Fund:Natural Science Foundation of Inner Mongolia Autonomous Region (2021GG0096).

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	Articles by authors
	SONG Zhiqi
	ZHAO Xudong
	WANG Jun
	HU Chaosheng
	LIU Yongzhen
	MA Yonglin

Cite this article:

SONG Zhiqi,ZHAO Xudong,WANG Jun, et al. Evolution of Solidification Microstructure of A356 Aluminum Alloy Treated by Pulse Magnetic Field[J]. Materials Reports, 2024, 38(13): 22100215-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22100215 OR http://www.mater-rep.com/EN/Y2024/V38/I13/22100215

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