Effect of Homogenization on Microstructure and Properties of Al–Mg–Si Roll-Casting Sheet

Resumo

The effect of homogenizing on the microstructure and properties of Al–Mg–Si roll-casting sheet were investigated by optical microscopy, scanning electron microscopy, energy dispersive spectroscopy, Vickers hardness measurements, and conductivity testing in this paper. The morphology, quantity, and species of the phases were studied. The results show that the Mg₂Si dissolved completely and Al₅(FeMnCr)Si transformed into Al₇₄(MnFeCr)₂₀Si₆ phase during homogenization. And the wavy grain boundaries that existed in the roll-casting microstructure vanished. After homogenization at 550°C × 4 h, the sample hardness reduced to 54 HV and conductivity increased to 26 MS/m.