Diffusion Bonding and Post-Weld Heat Treatment of Extruded AZ91 Magnesium Alloys

Authors

  • Fei LIN
  • YaXin TIAN
  • Zhitong CHEN
  • Fei WANG
  • QingSen MENG

DOI:

https://doi.org/10.5755/j01.ms.21.4.9699

Keywords:

AZ91 magnesium alloys, recrystallization anneal, diffusion bonding, shear strength, post-weld heat treatment

Abstract

The grain size of as-extruded AZ91 magnesium alloys was refined to 12.31 μm from 21.41 μm by recrystallization annealing. The vacuum diffusion welding of as-annealed AZ91 magnesium alloys was researched. The results showed that the maximum shear strength of joints reached 64.70 MPa in the situation of 10 MPa bonding pressure, 18 Pa vacuum degree, 470 °C bonding temperature and 90 min bonding time; both bonding temperature and time are the main influence factors on as-extruded AZ91 magnesium alloys diffusion welding. Then the diffusion welded specimens were annealed, and the shear strength of joints was further improved to 76.93 MPa.

DOI: http://dx.doi.org/10.5755/j01.ms.21.4.9699

Downloads

Published

2015-11-19

Issue

Vol. 21 No. 4 (2015)

Section

METALS, ALLOYS, COATINGS

License

 

The copyrights for articles in this journal are retained by the author(s), with first publication rights granted to the journal. By virtue of their appearance in this open-access journal, articles are free to use with proper attribution in educational and other non-commercial settings.