Additive Friction Stir Deposition of WE43 and AZ91 Magnesium Alloys: Microstructural and Mechanical Characterization

摘要

Ground and atomized WE43 and AZ91 powders were consolidated and deposited via additive friction stir (AFS), and their microstructural and mechanical properties were characterized. The additive friction stir process produced fully dense deposits with wrought microstructures. The mechanical properties of WE43 and AZ91 alloys deposited via this solid-state additive manufacturing process were superior to that of conventional powder metallurgy products and comparable to that of wrought alloys. The effect of solute retention during grinding and atomization on the final mechanical properties of the as-deposited material was analyzed. The effect of AFS processing parameters on the microstructural evolution and the final solute content was investigated. The strengthening potential due to post-deposition heat treatment, based on solute content, is discussed.