Grain size effects on softening behavior of bulk nanostructured mechanically milled Mg-5%Al alloy

Abstract

In the present study, Mg-5%Al alloy was synthesized by mechanical alloying for different durations. Tensile behaviors at different strain rates were conducted at room temperature. The results revealed that yield stress and elongation of the un-milled samples were independent of strain rate within the range of strain rates between 3.33×10 -5s -1and 3.33×10 -3s -1. However, yield stress and elongation of the mechanically alloyed samples were strain rates dependent. The strain rate sensitivity of the sample milled for 30 hours, for example, was found to be about 0.17. © Institute of Materials Engineering Australasia Ltd.