Effect of cold rolling on hydrogen sorption properties of die-cast and as-cast magnesium alloys

The effect of cold rolling, as an activation process of materials aimed to hydrogen storage application, was applied to some cast magnesium alloys. The alloys studied in this work are AZ91D and three experimental creep resistant magnesium alloys (MRI153, AXJ530, ZAEX10430) in the as-cast and die-cast states. Experiments showed that AZ91D, MRI153 and ZAEX10430 have faster absorption/desorption kinetic than as-cast pure magnesium. On the other hand, AXJ530 showed the worst hydrogen storage properties. These results were attributed to a possible beneficial effect of aluminum and zinc as alloying elements. Segregation inside primary alpha-Mg grains may explain the difference of hydrogen storage properties between as-cast and die-cast alloys. (C) 2012 Elsevier B.V. All rights reserved.