Regulating Precipitates by Simple Cold Deformations to
Strengthen Mg Alloys: A Review
1School of Materials and Energy, Southwest University, Chongqing 400715, China
2College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
3Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), College of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
4College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, China
5State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
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.