High-strain-rate superplasticity of fine-grained Mg–6Zn–0.5Zr alloy subjected to low-temperature indirect extrusion. (December 2017)

• Record Type: Journal Article
• Authors: Kim, Beomcheol; Kim, Jong Chan; Lee, Sooseok; Lee, Ki-Suk; Lee, Jung Gu; Park, Sung Soo
• Is Part Of: Scripta materialia. Number 141(2017)
• Page Start: 138
• Page End: 142
• Publication Date: 2017-12
• Subjects: Magnesium alloy -- Extrusion -- Grain refinement -- High-strain-rate superplasticity; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.08.008
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: A commercial Mg–6Zn–0.5Zr alloy was subjected to low-temperature indirect extrusion for grain refinement and the tensile properties of the extruded alloy at 250 °C were investigated. After extrusion, the alloy showed finely recrystallized grains with an average size of 1.6 μm. High-strain-rate superplasticity was observed in the fine-grained alloy, which exhibited a tensile elongation of up to 800% at a strain rate of 0.01 s −1 . Experimental results demonstrating the occurrence of grain boundary sliding during the high-strain-rate superplastic deformation are presented. Graphical abstract: