摘要
The high-temperature plastic deformation be- haviors of 6016 aluminum alloy were investigated with the temperatures ranging from 420 to 540 ℃ and the strain rates ranging from 0.001 to 1.000 s-1. The results show that 6016 aluminum alloys possess superplasticity at 500 ℃ with the strain rates ranging from 0.001 to 0.010 s-1. The grain boundary sliding （GBS） is the main mechanism of superplastic deformation of 6016 aluminum alloy. In addition, a great number of O-type cavities, almost no V type, occur in the microstructure of superplastic deformed 6016 aluminum alloy. The dislocations gather near the grain boundaries to coordinate GBS deformation. The second-phase particles effectively prevent the growth of the recrystallized grains or plastic deformation grains and pin the moving dislocations during deformation.
The high-temperature plastic deformation be- haviors of 6016 aluminum alloy were investigated with the temperatures ranging from 420 to 540 ℃ and the strain rates ranging from 0.001 to 1.000 s-1. The results show that 6016 aluminum alloys possess superplasticity at 500 ℃ with the strain rates ranging from 0.001 to 0.010 s-1. The grain boundary sliding （GBS） is the main mechanism of superplastic deformation of 6016 aluminum alloy. In addition, a great number of O-type cavities, almost no V type, occur in the microstructure of superplastic deformed 6016 aluminum alloy. The dislocations gather near the grain boundaries to coordinate GBS deformation. The second-phase particles effectively prevent the growth of the recrystallized grains or plastic deformation grains and pin the moving dislocations during deformation.
基金
financially supported by the Foundation of Chongqing Fundamental and Advanced Research Projects(No.csct2013jcyj A70015)
the Project Foundation of Chongqing Municipal Education Committee(No.KJ080407)
