Journal
MATERIALS LETTERS
Volume 250, Issue -, Pages 42-45Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2019.04.120
Keywords
6063 aluminum alloy; Intermetallics; Phase transformation; Homogenization
Funding
- Thailand Graduate Institute of Science and Technology (TGIST), under NSTDA
- KMUTT 55th Anniversary Commemorative Fund
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The present study reports microstructural observation during thermal treatment of 6063 aluminum alloy. Microscopic investigation employing low-energy electron and X-ray photoemission electron techniques was conducted. Work function pertaining thereto such techniques was analyzed. During the thermal treatment representing homogenization of the alloy, as-cast intermetallics transform morphologically from initial beta-AlFeSi to alpha-Al(FeMn)Si. The transformation is governed by elemental diffusion between the as-cast intermetallics and the aluminum matrix and by reversible wetting of grain boundaries. These lead to formation of discrete and globular particles of alpha-Al(FeMn)Si all over the aluminum matrix. This in-situ study reveals that the phase transformation is not taken place by nucleation of alpha-Al(FeMn)Si onto surfaces of beta-AlFeSi. (C) 2019 Elsevier B.V. All rights reserved.
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