Regulating Precipitates by Simple Cold Deformations to Strengthen Mg Alloys: A Review

Abstract

Regulating precipitates is still an important issue in the development of high-strength Mg alloys, due to it determining the precipitation hardening effect. Cold deformation, as a simple and low-cost method, can remarkably influence the precipitate features. It is found that pre-cold deformation before aging can be utilized to enhance the precipitation hardening effect of Mg alloys. Moreover, post-deformation after aging could be an effective method to regulate precipitation orientation. In this review, recent research on the regulation of precipitation behavior by cold deformation in Mg-Al, Mg-Zn, and Mg-RE (RE: rare-earth elements) alloy systems was critically reviewed. The changes in precipitate features and mechanical properties of peak-aged Mg alloys via cold deformation were summarized. The corresponding strengthening mechanisms were also discussed. Finally, further research directions in this field were proposed.

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Influence of Wavy Bending on Microstructure and Mechanical Properties of a Rolled AZ31 Sheet

“…Mg and its alloys are currently receiving widespread attention, especially in the automobile industry, due to the low density and high specific strength [1,2]. However, the low stretch formability at room temperature largely limits the widespread application of Mg alloy sheets [3,4].…”

Effect of Zn Content on the Microstructure and Mechanical Properties of Mg–Al–Sn–Mn Alloys

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