J. Mater. Sci. Technol. ›› 2020, Vol. 51 ›› Issue (0): 111-118.DOI: 10.1016/j.jmst.2020.02.044

• Research Article • Previous Articles     Next Articles

Exceptional mechanical properties of AZ31 alloy wire by combination of cold drawing and EPT

Zhaohui Shana, Jing Baib, Jianfeng Fana,c,*(), Hongfei Wua, Hua Zhanga,c, Qiang Zhanga,c, Yucheng Wua, Weiguo Lia, Hongbiao Dongd, Bingshe Xua   

  1. a Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
    b School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
    c Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan 030024, China
    d Department of Engineering, University of Leicester, Leicester LE1 7RH, UK
  • Received:2019-12-10 Revised:2020-02-02 Accepted:2020-02-05 Online:2020-08-15 Published:2020-08-11
  • Contact: Jianfeng Fan

Abstract:

A 0.66 mm-diameter AZ31 alloy wire with ultimate tensile strength of 400 MPa and elongation of 28.5% was successfully prepared via the combination of cold-drawing and electropulsing treatment processing (EPT). Microstructure observation showed that the grain size of EPTed samples was refined to about 1 μm and the basal texture strength with maxima texture index was weakened to 7.18. EPT can significantly accelerate recrystallization by enhancing the mobility of dislocation and atomic diffusion due to the coupling of the thermal and athermal effects. Finally, uniform ultrafine-grained structure was obtained in the EPTed samples by static recrystallization completed in a very short time (30 s) at relatively low temperature (433 K).

Key words: AZ31 alloy wire, Electropulsing treatment, Dislocation, Atomic diffusion, Microstructure, Mechanical properties