The mechanical behavior of 5052-H32 aluminum alloys under a pulsed electric current

•Investigated the electroplasticity of an Al alloy under a pulsed electric current.•The same electric energy densities induced identical mechanical responses.•The formability of the Al alloy was significantly improved.•An expression for the contour of electroplastic stress–strain curve was suggested...

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Published inInternational journal of plasticity Vol. 58; pp. 84 - 99
Main Authors Roh, Jae-Hun, Seo, Jeong-Jin, Hong, Sung-Tae, Kim, Moon-Jo, Han, Heung Nam, Roth, John T.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.07.2014
Subjects
Alloys
Aluminum alloy
Aluminum base alloys
Boundaries
Electric current
Electric energy density
Electric pulses
Electroplasticity
Empirical analysis
Pulsed electric current
Stress strain curves
Stress-strain relationships
Stress–strain behavior
Electroplasticity
Stress–strain behavior
Pulsed electric current
Electric energy density
Aluminum alloy
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Summary:•Investigated the electroplasticity of an Al alloy under a pulsed electric current.•The same electric energy densities induced identical mechanical responses.•The formability of the Al alloy was significantly improved.•An expression for the contour of electroplastic stress–strain curve was suggested. The electroplasticity of an aluminum 5052-H32 alloy under a pulsed electric current is investigated experimentally. A pulsed electric current is applied to a specimen simultaneously with a quasi-static uniaxial tensile load. The experimental result shows a ratchet shape stress–strain curve under a pulsed electric current. The formability of the selected aluminum alloy is significantly improved at near room temperature depending on the electric pulse parameters. An empirical expression to describe the upper boundary of the ratchet shape stress–strain curve of the aluminum alloy under a pulsed electric current is suggested. Two electroplastic coefficients are used in the suggested empirical expression: one is a material constant and the other accounts for the effects of the electric energy density and the electric pulse period. The result of the present study is expected to provide a basis to develop sheet metal forming processes using electroplasticity.
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ISSN:0749-6419
1879-2154
DOI:10.1016/j.ijplas.2014.02.002