摘要
Superplasticity of as-rolled ZK60 magnesium alloy sheets, with the average grain size of 8.2μm, was investigated at a strain rate of 5.56×10-45.56×10-2 s-1 at 573673K. 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.
Superplasticity of as-rolled ZK60 magnesium alloy sheets, with the average grain size of 8.2μm, was in- vestigated at a strain rate of 5.56 ×10^-4- 5.56 × 10^-2 s^-1 at 573 -673 K. The microstructure evolution during the superplastic deformation shows that the alloy deforms in a superplastic manner at the temperature from 573 K to 673 K. 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 10 MPa for holding time 1 h at 673 K. 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.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2005年第6期1253-1257,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(E3080)supportedbyNaturalScienceFoundationofHeilongjiangProvince
Project(10541046)supportedbyScientificItemofEducationOfficeofHeilongjiangProvince
关键词
镁合金
超塑性
扩散焊
比强度
ZK60合金
ZK60 magnesium alloy
lap bonding
superplasticity
specific strength
