中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 15 No. 6 December 2005 |
magnesium alloy
ZAI Chun-quan(翟春泉)2, DING Wen-jiang(丁文江)2
（1. School of Materials Science and Engineering,
Harbin University of Science and Technology, Harbin 150040, China;
2. Light Alloy Net Forming National Engineering Research Center,
Shanghai Jiaotong University, Shanghai 200030, China）
Abstract: Superplasticity of as-rolled ZK60 magnesium alloy sheets, with the average grain size of 8.2μm, was investigated at a strain rate of 5.56×10-4-5.56×10-2s-1 at 573-673K. The microstructure evolution during the superplastic deformation shows that the alloy deforms in a superplastic manner at the temperature from 573K to 673K. Diffusion bonding tests were carried out on the Gleeble-1500 testing machine and the specimens were successfully diffusion bonded at the superplastic temperature. The maximum specific strength is 0.82 at a bonding pressure of 10MPa for holding time 1h at 673K. The microstructures of the joints were observed through OM and SEM. There is no bond line visible in the original interfaces of sound joint with high specific strength.
Key words: ZK60 magnesium alloy; lap bonding; superplasticity; specific strength
