Journal
MATERIALS LETTERS
Volume 164, Issue -, Pages 19-22Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2015.10.072
Keywords
Al-Mg-Sc alloy; Sc-rich particles; Atomic force microscopy; Eutectic; Multilayer structure
Funding
- Science, Technology Development Programme of Anhui Province [1301021006, 1501021063]
- Fundamental Research Funds for the Central Universities [2013HGCH0003]
- Yunnan Yushi industrial Development Co., Ltd
- Natural Science Foundation of China [51401072]
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An addition of a high level of 0.6 wt% Sc imposed a remarkable grain refining effect on Al-5Mg alloy for as-cast condition, changing typical dendrite microstructure into fine equiaxed grains. Such effect was found to be related to the extensively formed Sc-rich particles. Electron back-scatter diffraction (EBSD), Atomic force microscopy (AFM) and SEM-elemental mapping were employed to investigate the inner structure of these particles and their role in grain refining. They could be identified as some eutectic structure consist of multilayer of 'Al3Sc+alpha-Al+Al3Sc....', which shows good consistency in orientation both in the particle and matrix. (C) 2015 Elsevier B.V. All rights reserved.
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