Microstructure and mechanical properties of asextruded Mg– x Al–5Sn–0·3Mn alloys ( x  = 1,3,6 and 9)

Abstract

Properties of Mg–xAl–5Sn–0·3Mn alloys (x = 1, 3, 6 and 9) prepared by hot extrusion are reported. The orientation relationship between Mg₂Sn precipitate and Mg matrix in Mg–9Al–5Sn–0·3Mn alloy was determined. The yield strength of the as extruded alloys initially decreased with increasing Al content, then increased for Al contents >6 wt-. These changes are interpreted in terms of the effect of texture, grain size and second phase on the yield strength of the alloys.