Abstract
Investigation into Constitutive Equation and Hot Compression Deformation Behavior of 6061 Al Alloy
Highlights
As a promising engineering material, aluminum and its alloys have attracted a lot of attention over the past decades [1,2]
The results suggest that the stress level of 6061 Al alloy during hot compression process decreases with increasing compression temperature and decreasing strain rate
The microstructure after hot deformation consists of elongated grains and the dynamic recovery of 6061 Al alloy occurs during hot compression
Summary
As a promising engineering material, aluminum and its alloys have attracted a lot of attention over the past decades [1,2]. The mechanic properties of Al alloys are closely related to their microstructures and will be affected by the degree of hot working. Many reports [7,8,9,10] have shown that manipulated by forming heat, strain-rate and deformation degree, work-hardening and dynamic softening phenomenon decide together on the flow behaviour’s complication during thermal forming process. We try to conduct the isothermal compression experiments of 6061 Al alloy through various compression temperatures and different strain rates, to modify the obtained flow stress in an easy and effective way, and to extensively study the hot deformation behavior of 6061 Al alloy based on stress strain curve establishing, constitutive model building-up and microstructure observation. The primary target of present research was to obtain basic knowledge of thermoforming behaviour of 6061 Al alloy, so as to optimize the thermoforming process parameters and to control associated microstructures
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