Dynamic precipitation during multi-axial forging of an Mg–7Gd–5Y–1Nd–0.5Zr alloy

摘要

The dynamic precipitation behavior during multi-axial forging in an Mg–7Gd–5Y–1Nd–0.5Zr alloy has been investigated and compared with that in static precipitation treatment. The results indicated that dynamic precipitation does occur during multi-axial forging. The dynamic precipitate can be deduced asβphase with face-centered cubic crystal structure (a?=?2.22?nm). Most of theβprecipitates locate at the dynamic recrystallization grain boundaries. The morphology and orientation relationship is different from that of theβphase formed in the static precipitation treated alloys, although the crystal structure is the same. The precipitation temperature ofβphase during MAF is higher than that in the static precipitation treatment.