The behavior of alloys in the semi-solid state depends strongly on the imposed stress state and the morphology of the phase, which can vary from dendritic to globular. For the optimal net shape forging of semi-solid materials (SSM), it is important to have knowledge of the material behavior with variation of strain rate. Therefore, to investigate the effect of the compression velocity of the deformation of aluminum alloy with a globular microstructure, the compression test for semi-solid aluminum alloy with a controlled solid fraction is performed by material test system provided with a furnace. The behavior of the semi-solid aluminum alloy is discussed for various solid fractions and die speeds. The material constants in the stress-strain relationship are also proposed.
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