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- Title
High Temperature Deformation Flow Of A ZK60A Magnesium Alloy After Extrusion.
- Authors
Kawasaki, M.; Lee, H.-J.; Oh, M.C.; Ahn, B.
- Abstract
Flow behavior of a ZK60A magnesium alloy after continuous casting and subsequent extrusion was examined in tension at a range of strain rates of 3.0×10−6 − 1.0×10−2 s−1 at temperatures of 473-623K. The results demonstrated that the alloy exhibited a maximum elongation of ~250% at 523K when tested at an initial strain rate of 1.0×10−5 s−1 and strain rate sensitivity, m, of ~0.3-0.4 and the activation energy of ~94 kJ/mol were calculated under the testing conditions. The detailed investigation suggested that the high temperature flow of the ZK60A alloy having submicrometer grains demonstrates quasi-superplastic flow behavior controlled by a dislocation viscous glide process.
- Subjects
MAGNESIUM alloys; DETERIORATION of metals; METAL extrusion; ALLOY testing; HIGH temperature metallurgy; TENSILE strength
- Publication
Archives of Metallurgy & Materials, 2015, Vol 60, Issue 2, p1327
- ISSN
1733-3490
- Publication type
Article
- DOI
10.1515/amm-2015-0124