Journal
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
Volume 4, Issue 1, Pages 14-17Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmrt.2014.10.008
Keywords
Magnesium alloys; High-pressure torsion; Annealing; Severe plastic deformation
Funding
- FAPEMIG
- CNPq [483077/2011-9]
- CAPES [PVE 037/2012]
- European Research Council under ERC [267464-SPDMETALS]
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High-pressure torsion (HPT) was used to impose severe plastic deformation on a magnesium alloy AZ31. The material was processed for 0.5, 1, 2, 3, 5 and 7 turns at room temperature under a pressure of 6.0 GPa. Samples were annealed for 1800 sat temperatures of 373 K, 423 K, 473 K, 573 K and 673 K. Microhardness tests and metallography were used to determine the evolution of strength and grain size as a function of the annealing temperature. The results show that recrystallization takes place at temperatures higher than 423 K. The annealing behavior is independent of the number of turns in HPT. (C) 2014 Brazilian Metallurgical, Materials and Mining Association. Published by Elsevier Editora Ltda. All rights reserved.
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