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HomeKey Engineering MaterialsKey Engineering Materials Vol. 750Microstructure and Corrosion Properties of...

Microstructure and Corrosion Properties of Homogenized Mg-4Zn-1La Magnesium Alloy

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Abstract:

In this study, microstructure and corrosion behaviour of homogenized Mg-4Zn-1La magnesium alloy was investigated. Mg-4Zn-1La alloy was produced by low-pressure die casting method. Homogenization treatments were performed at 350 °C and 400 °C for 12, 18, 24 and 48 hours, followed by rapid cooling in water at room temperature. Microstructure characterizations showed that La addition led to a formation of semi-continuous network structure and islands of second phases which identified as T-phase (Mg₇Zn₃RE). A significant amount of second phase dissolution and an increase in a-Mg grain size with increasing both homogenization time and temperature was observed. Homogenization treatment led to an improvement in corrosion resistance of Mg-4Zn-1La alloy. Homogenization at 400 °C resulted in better corrosion resistance than homogenization at 350 °C for all homogenization duration.

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Materials Research and Application II

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Periodical:

Key Engineering Materials (Volume 750)

Pages:

118-123

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.750.118

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Online since:

August 2017

Authors:

Huseyin Zengin, Yunus Turen*, Hayrettin Ahlatci, Yavuz Sun, Ismail Hakkı Kara

Keywords:

Corrosion, Homogenization, Magnesium Alloys, Microstructure

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