Y对6082铝合金铸轧板微观结构及性能的影响

doi:10.11896/cldb.23080147

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Abstract This study investigated the influence of adding trace amounts of Y element on the microstructure and mechanical properties of 6082 aluminum alloy produced by dual-roll casting. Different Y contents were designed, and 6082 cast-rolled plates were prepared using a dual-roll casting machine. X-ray diffraction, metallographic observation, and scanning electron microscopy were employed to study the effect of Y on the microstructure and properties of the cast-rolled plates. The results show that Y element has a significant refining effect. The average grain sizes of the edge and center regions of the plate with a Y content of 0.35wt% reach a minimum at 30.9 μm and 25.7 μm, respectively. The mechanical properties of the plate are the best at this Y content, with tensile strength, yield strength, and elongation of 200.5 MPa, 129.9 MPa, and 14.9%, respectively. With further addition of Y, the impurity phases and rare earth compounds in the microstructure increase significantly, and the formability of the material decreases substantially. Analysis reveals that Y element segregates at grain boundaries, forming compounds such as Al₃Y and Y₅Si₃, which can inhibit grain boundary migration and contribute to grain refinement. Additionally, Y interacts with Fe elements in the alloy, transforming the coarse eutectic phases on the grain boundaries into finer particles and improving the alloy’s ductility.

Key words： twin-roll casting 6082 aluminum alloy Y microalloying

Published: 10 August 2024 Online: 2024-08-29

CLC number:

TG146.2

Fund:National Natural Science Foundation of China (52104377), and Key Laboratory of Process Control for Metallurgical Equipment ( Science and Technology Department ) (2023KFKT-03).

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	Articles by authors
	XU Ze
	XU Zhen
	LYU Zhe
	SONG Hua
	CHEN Qingqiang

Cite this article:

XU Ze,XU Zhen,LYU Zhe, et al. Effects of Y on the Microstructure and Properties of 6082 Aluminum Alloy Cast-Rolled Plates[J]. Materials Reports, 2024, 38(15): 23080147-6.

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http://www.mater-rep.com/EN/10.11896/cldb.23080147 OR http://www.mater-rep.com/EN/Y2024/V38/I15/23080147

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