High-temperature dynamic deformation of aluminum alloys using SHPB

作者：Lee Ouk Sub^*; Choi HyeBin; Kim HongMin

来源：Journal of Mechanical Science and Technology, 2011, 25(1): 143-148.

DOI：10.1007/s12206-010-1106-9

• m-SHPB (modified split Hopkinson pressure bar)
• Dynamic deformation behavior
• Johnson-cook constitutive model
• Flow stress
• High strain rate
• High temperature
• Pulse shaper
• Aluminum alloys

This paper investigates the dynamic deformation behavior of two aluminum alloys, 2024-T4 and 6061-T6, using a modified split Hopkinson pressure bar (SHPB) with a pulse shaper technique at both elevated and room temperatures. An experimental strategy is proposed, and the dynamic deformation behaviors of two alloys are evaluated with the modified high-temperature SHPB apparatus. The experiments were carried out under varying strain rates and temperatures. The reflected waves modulated by the pulse shaper, the flow stress-strain relationships, the strain rates, the front- and back-ends stresses during the dynamic deformation period were measured at varying high temperatures. Experimentally obtained data were used to evaluate the parameters in the material constitutive equation, such as the Johnson-Cook (JC) constitutive model.

• 出版日期2011-1