Journal article
Effect of Mg on dynamic recrystallization of Zn–Mg alloys during room-temperature compression
Journal of Materials Science & Engineering. A, Vol.830, pp.1-14
2021
Abstract
This work reveals the role of Mg additions on deformation behaviours of Zn–Mg alloys during room temperature compression at moderately high strain rate of ∼0.5 s-1. Experimental results from scanning electron microscopy, transmission electron microscopy and electron backscatter diffraction provide insight into the deformation behaviours and dynamic recrystallization mechanisms operative in Zn-0.08%Mg and Zn-0.8%Mg alloys. The primary dynamic recrystallization mechanisms in the Zn-0.08%Mg alloy were continuous dynamic recrystallization in conjunction with twin-induced dynamic recrystallization. After straining to a true strain of 161%, the Zn-0.08%Mg alloy displayed a uniform and heavily refined microstructure with an excellent combination of strength and plasticity. For the Zn-0.8%Mg alloy, particle-induced dynamic recrystallization activated by eutectic structures played a critical role in addition to continuous and twin-induced dynamic recrystallization mechanisms. Fine and soft-oriented grains which formed in proximity to the eutectic accommodated large amounts of localized plastic strain. This resulted in inhomogeneous strain partitioning which restricted dynamic recrystallization kinetics in hard-oriented grain interior regions due to insufficient slip activity to support continuous dynamic recrystallization. Therefore, a partially recrystallized microstructure was maintained in the Zn-0.8%Mg alloy up to true strain of 161%.
•Zn-0.08%Mg deformed at RT achieved a refined structure with the average grain size of 2.2 μm.•The primary DRX mechanisms in Zn–Mg alloys are basal slip induced CDRX.•Sluggish DRX kinetics in Zn-0.8%Mg due to the eutectic network.
Details
- Title
- Effect of Mg on dynamic recrystallization of Zn–Mg alloys during room-temperature compression
- Authors
- Shiyang Liu (Author) - University of QueenslandHongyi Zhan (Author) - General Motors Global Research & Development (China)Damon Kent (Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringQiyang Tan (Author) - University of QueenslandYu Yin (Author) - University of QueenslandNghiem Doan (Author) - University of QueenslandChang Wang (Author) - Northwest Institute For Non-Ferrous Metal ResearchMatthew Dargusch (Author) - University of QueenslandGui Wang (Author) - University of Queensland
- Publication details
- Journal of Materials Science & Engineering. A, Vol.830, pp.1-14
- Publisher
- Elsevier BV
- DOI
- 10.1016/j.msea.2021.142243
- ISSN
- 1873-4936
- Organisation Unit
- School of Science, Technology and Engineering; University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99585806402621
- Output Type
- Journal article
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- Web Of Science research areas
- Materials Science, Multidisciplinary
- Metallurgy & Metallurgical Engineering
- Nanoscience & Nanotechnology
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