Effect of Homogenization Temperature on the Microstructure and Property of 6061 Aluminum Alloy with Erbium

Abstract:

The microstructure and mechanical properties of as-homogenized 6061 aluminum alloy with 0.2wt.% Er were investigated. The microstructures of the as-casted and homogenized alloys were analyzed using optical microscopy (OM) and scanning electron microscopy (SEM). Energy dispersion X-ray spectroscopy (EDS) was used to analyze the phase chemical composition. The results showed that the homogenizing treatment had a significant influence on the precipitate morphology of the alloy. With increasing homogenization temperature, the long strip-like Fe-rich grain distributed on the boundary phase became discontinuous and sparseness, transforming to short rod and granular shape. In addition, the Fe-rich phase with a large fish-bone structure became smaller. During homogenizing treatment, a large number of dispersive Mg₂Si phase appeared inside grains, and large number of the phases containing Er were dissolved into the matrix.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 47-52
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.47
• Online since: June 2017
• Authors: Sha Sha Dong, Bo Long Li*, Wen Jian Lv, Peng Qi, Zuo-Ren Nie
• Keywords: 6061 Aluminum Alloy with Erbium, Homogenization Temperature, Mechanical Properties, Microstructure

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