Effect of Y on Microstructure and Corrosion Resistance of AZ61 Magnesium Alloy

Abstract:

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The effect of Y addition on the microstructure of AZ61 alloy was investigated by optical microscopy (OM), X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). The corrosion behavior of AZ61 alloy with Y addition in 3.5 % NaCl solution was studied by static weight loss and polarization curves corrosion tests. The results show that AZ61 alloy with Y addition can refine grain size of the matrix and alter the distribution of the phase β-Mg17Al12 from continuous network morphology transition to small and dispersive distribution along the grain boundary by forming the second phase Al2Y which has a high melting point. In addition, the addition of Y can decrease the corrosion current density of AZ61 magnesium alloy in 3.5% NaCl solution, thereby improving the corrosion resistance of AZ61 magnesium alloy. Results show that AZ61 magnesium alloy with 1.0% Y has the most refined microstructure and the best corrosion resistance.

Info:

Periodical:

Advanced Materials Research (Volumes 284-286)

Main Theme:

Edited by:

Xiaoming Sang, Pengcheng Wang, Liqun Ai, Yungang Li and Jinglong Bu

Pages:

1529-1532

DOI:

10.4028/www.scientific.net/AMR.284-286.1529

Citation:

C. X. Xu et al., "Effect of Y on Microstructure and Corrosion Resistance of AZ61 Magnesium Alloy", Advanced Materials Research, Vols. 284-286, pp. 1529-1532, 2011

Online since:

July 2011

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Price:

$35.00

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