Abstract
Mechanically alloyed powder is active and it has high driving force for sintering. The mechanical alloying of mixture of AZ31 chip and aluminum or alumina powder with various compositions was performed using high-energy ball mill. The alloying process and structural change with milling time were investigated. The obtained alloy powder was constituted of structure with ultra fine crystalline size of nanometer order. The mechanically alloyed powder was bonded on surface of magnesium alloy (AZ31B) at various temperatures and pressures by the hot pressing. The structural change and hardness distribution at the bonded part under various conditions in the hot pressing were investigated, in order to surface improvement of magnesium alloy using the mechanically alloyed powder.
