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Effect of short-time current on quasi-static tensile behavior of AZ31 magnesium alloy

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Document pages: 10 pages

Abstract: The effect of short pulse current on the quasi-static tensile behavior of AZ31 magnesium alloy was experimentally studied. When the specimen deforms in the plastic zone under quasi-static tensile load, a single pulse current with a duration of less than 1 second is applied to the specimen. After the flow stress decreases almost instantaneously under the current pulse, the flow stress shows strain hardening until the sample fails. The experimental results show that the strain hardening parameters (strength coefficient and strain hardening index) of the current post hardening curve strongly depend on the applied electric energy density (electric energy per unit volume). Empirical expression suggested to describe the hardening behavior after the pulse as a function of the electric energy density and are compared with the empirical expressions suggested for advanced high-strength steels.

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