Zr+Er及Zr+Y对Al-Mg-Si-Cu-Mn-Cr合金组织和拉伸力学性能的影响<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.018.015

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Abstract The effects of 0.3%Zr+0.2%Er and 0.3%Zr+0.2%Y (mass fraction) on the microstructure and mechanical properties of Al-0.6Mg-0.9Si-0.5Cu-0.5Mn-0.2Cr (mass fraction) alloy before and after heat treatment were investigated based on optical microscopy (OM), scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDS), transmission electron microscopy (TEM) and tensile test. The results showed that both Zr+Er and Zr+Y could refine the α-Al grains, and the latter was more prominent and effective. Furthermore, both of them could improve the strength and ductility of the as-cast Al-0.6Mg-0.9Si-0.5Cu-0.5Mn-0.2Cr alloy. With heat treatment, both Zr+Er and Zr+Y had a negative influence on the precipitation of dispersed phase in the alloy and resulted in a decrease in dispersion strengthening. Finally, Zr+Er modified alloy had higher strength than matrix alloy, while Zr+Y modified alloy had lower strength, and both of them had lower elongation than matrix alloy.

Key words： aluminium alloy microalloying grain refinement dispersed phase mechanical property

Published: 08 May 2018

CLC number:

TG146.2

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	Articles by authors
	WANG Xiaolu
	ZHAO Yutao
	JIAO Lei
	QIAN Wei
	WANG Yan

Cite this article:

WANG Xiaolu,ZHAO Yutao,JIAO Lei, et al. Effects of Zr+Er and Zr+Y on Microstructure and Tensile Properties of Al-Mg-Si-Cu-Mn-Cr Alloys[J]. Materials Reports, 2017, 31(18): 72-76.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.018.015 OR http://www.mater-rep.com/EN/Y2017/V31/I18/72

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