Corrosion Resistance of AZ31B Magnesium Alloy Sheets Prepared by Extruding and Rolling

Abstract

AZ31B Magnesium alloy sheets with about 1 mm in thickness were rolled by one pass and several passes from the extruded ingots with different thickness. The effects of processing variables on microstructure and mechanical properties of AZ31B Mg alloy sheets were investigated. XRD indicated that AZ31B magnesium alloy sheets have a dominant texture with (000l) orientated plane. The large deformation results in the formation of fine and homogeneous microstructure due to the recrystallization during extruding and hot-rolling. The thinnest sheet rolled by several passes showed equiaxed grains with 5-10μm in diameter. The fine recrystallization grains contribute to the increase in the corrosion resistance. The corrosion rate of the sheets rolled by several passes was 1.9 mm/year in 3.5% NaCl solution.

Review of Magnesium Wheel Types and Methods of Their Manufacture

“…Foundries specializing in nonferrous metals have the technological equipment and experience to produce cast magnesium wheels on a large scale. Cast magnesium wheels are characterized by high dimensional accuracy and lower manufacturing costs [38][39][40]. The most common types of casting used are gravity casting [41], high-pressure casting (HPC) [41], or low-pressure casting (LPC) [41][42][43][44], which is much more commonly used [15,45,46].…”