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The Role of Microstructure in Localized Corrosion of Magnesium Alloys
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Metallurgical and Materials Transactions
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August 1, 2004
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Copyright informationCopyright Minerals, Metals & Materials Society Aug 2004. Provided by ProQuest LLC. (Hide copyright information)
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The article presents new findings on the influence of microstructural changes on corrosion behavior of magnesium alloy AZ91 in chloride solution, with a particular attention to the role of the [beta] phase (Mg^sub 17^Al^sub 12^) and the surrounding Al-rich-[alpha] area. The as-cast alloy was subjected to solutionizing and aging heat treatments, in order to incorporate variation in morphology and distribution of the intermetallic [beta] phase and the surrounding Al-rich-[alpha] (also known as eutectic [alpha]). Although previous workers have ascribed the higher corrosion resistance of a fine-grained alloy to the formation of the finely distributed [beta] phase, the present work suggests that ...
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