Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7978739 | Materials Science and Engineering: A | 2015 | 6 Pages |
Abstract
The effects of erbium (Er) modification on the microstructure and mechanical properties of A356 aluminum alloys were investigated using optical microscope, X-ray diffraction, scanning electronic microscope and mechanical testing. Experimental results show that additions of Er refined the α-Al grains and eutectic Si phases in its as-cast state; the addition of 0.3 wt% of Er has the best effects on them. The Fe-containing Al3Er phases were introduced by the modifications; by a T6 treatment, the eutectic Si phases were further sphereodized; the large Al3Er and β-Al5FeSi phases were changed into fine particles and short rods; which enhanced the hardness of the alloys. The highest strength and elongation were obtained for the 0.3 wt% of Er-modified and T6-treated A356 alloy.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Z.M. Shi, Q. Wang, G. Zhao, R.Y. Zhang,