Abstract
Aluminum alloy possesses poor plastic deformation ability under quasi-static stamping (QS). Hence, the plastic deformation behavior and microstructure evolution of 5052 aluminum alloy in electromagnetic driven stamping (EMDS) and QS under different heat treatment conditions were investigated in this paper. Compared with QS, EMDS can respectively improve the strength and plasticity of 5052-O aluminum alloy by 0.9% and 12%, as well as 4.6% and 30% in 5052-H32 state. The enhancement effect of EMDS on 5052-H32 aluminum alloy is more obvious. This is due to the 5052-H32 aluminum alloy has more initial dislocations, which will promotes multi-system slip and cross-slip of dislocation at high strain rates. Microscopic analysis indicates that the 5052-H32 aluminum alloy in EMDS possessed a more uniform dislocation distribution and a higher grain refinement degree. For a higher forming height, the grain boundary, dislocation and texture exhibit more obvious effects on the strength of the materials. It provides a theoretical basis for the forming mechanism of 5052 aluminum alloy during EMDS under different heat treatment conditions.
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