title: Low temperature deformation behavior of an electromagnetically bulged 5052 aluminum alloy.
abstract: The fundamental understanding of the deformation behavior of electromagnetically formed metallic components under extreme conditions is important. Here, the effect of low temperature on the deformation behavior of an electromagnetically-bulged 5052 aluminum alloy was investigated through uniaxial tension. We found that the Portevin-Le Chatelier Effect, designated by the serrated characteristic in stress-strain curves, continuously decays until completely disappears with decreasing temperature. The physical origin of the phenomenon is rationalized on the basis of the theoretical analysis and the Monte Carlo simulation, which reveal an increasing resistance to dislocation motion imposed by lowering temperature. The dislocations are captured completely by solute atoms at -50 °C, which results in the extinction of Portevin-Le Chatelier. The detailed mechanism responsible for this process is further examined through Monte Carlo simulation.
authors.affiliation: School of Materials Science and Engineering and State Key Laboratory of Material Processing and Die &Mould Technology, Huazhong University of Science and Technology, 430074 Wuhan, PRC.
authors.forename: Zu
authors.initials: Z
authors.lastname: Li
authors.affiliation: School of Materials Science and Engineering and State Key Laboratory of Material Processing and Die &Mould Technology, Huazhong University of Science and Technology, 430074 Wuhan, PRC.
authors.forename: Ning
authors.initials: N
authors.lastname: Li
authors.affiliation: School of Materials Science and Engineering and State Key Laboratory of Material Processing and Die &Mould Technology, Huazhong University of Science and Technology, 430074 Wuhan, PRC.
authors.forename: Duzhen
authors.initials: D
authors.lastname: Wang
authors.affiliation: School of Materials Science and Engineering and State Key Laboratory of Material Processing and Die &Mould Technology, Huazhong University of Science and Technology, 430074 Wuhan, PRC.
authors.forename: Di
authors.initials: D
authors.lastname: Ouyang
authors.affiliation: School of Materials Science and Engineering and State Key Laboratory of Material Processing and Die &Mould Technology, Huazhong University of Science and Technology, 430074 Wuhan, PRC.
authors.forename: Lin
authors.initials: L
authors.lastname: Liu