Effect of annealing on the microstructures and properties of cold drawn Mg alloy wires

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2015-10, Vol.645, p.181-187
• Main Authors: Sun, Liuxia, Bai, Jing, Yin, Lingling, Gan, Yiwei, Xue, Feng, Chu, Chenglin, Yan, Jingli, Wan, Xiaofeng, Ding, Hongyan, Zhou, Guanghong
• Format: Article
• Language: English
• Subjects: Alloys; Annealing treatment; Cold drawing; Cold drawn; Magnesium base alloys; Microstructure; Rare earth Mg alloys; Recrystallization; Static recrystallization; Surface layer; Texture; Wire
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2015.07.069

To prepare the biodegradable Mg alloy fine wires for the development of new biomedical Mg alloy implant devices, we investigated the static recrystallization behaviors of three kinds of Mg-rear earth (Gd, Y and Nd)-Zn alloys after intense cold drawing plastic deformation. The results demonstrate that all experimental alloys had good cold drawing formability, and showed similar static recrystallization kinetics with a recrystallization beginning temperature of ~300–350°C, a complete recrystallization temperature of ~400–425°C and a normal grain growth temperature ~450°C. Additionally, the grain morphology and texture play important role in affecting the subsequent cold drawing performance: more uniform and regular recrystallized grains are helpful to improve the subsequent cold drawing performance, but intense cold-drawn deformation texture which was hardly modified by heat treatment is harmful to subsequent drawing processing.