Mg-Al系メカニカルアロイング粉末とマグネシウム合金の圧延による積層接合

概要

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Atomized aluminum powder mixed to magnesium alloy (AZ31) turning chips with Mg-12 and 40 mol% Al compositions, were mechanically alloyed (MA) for 54 ks. For the surface improvements of the magnesium alloy, the obtained MA powders of Mg-12 mol% Al (12AlMA) and Mg-40 mol% Al (40AlMA) were stacked on magnesium alloy (AZ31 and AM60) sheets, then hot-rolled at various temperatures. After the roll-bonding, Mg17Al12 phase precipitates from super-saturated α-Mg in 12AlMA powder and it also forms from amorphous phases in 40AlMA powder. The hardness in the bonded MA powder layer becomes higher than as-MA powder particles. When roll-bonding were performed for 12AlMA powder over 400 K and for 40AlMA powder over 480 K, Mg and Al mixed each other by diffusion phenomenon in interface of MA layer and Mg alloy sheet. Fracture strength in 3-point bending of magnesium alloy sheet increases by bonding of MA powder.
社団法人粉体粉末冶金協会の論文
2005-01-15