Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 674, Issue -, Pages 491-497Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2016.08.023
Keywords
Magnesium alloy; Hot ring rolling; Precipitate; Texture
Categories
Funding
- National Basic Research Program of China (973 Program) [2013CB632200]
- National Natural Science Foundation of China [51574291]
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Hot ring rolling (HRR), a near-net-shape technology, was used to fabricate a large sized AZ80-Ag alloy ring at 653 K in this study. The microstructure, texture and mechanical properties of different regions within the HRRed ring wall were systematically investigated. The lowest level of plastic deformation and highest temperature are identified in the central region of the ring wall. Due to the influence of non-uniform distribution of strain and temperature, the deformed microstructure is inhomogeneous throughout the ring wall thickness. After rolling deformation, the spherical beta-Mg17Al12 precipitates are formed inside grains and along grain boundaries. The basal pole inclines and the {001}orientation spreads towards some particular directions depending on the sampling regions. Therefore, obvious anisotropy of mechanical properties was observed in various regions due to different basal slip Schmid factors in the tensile directions. (C) 2016 Elsevier B.V. All rights reserved.
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