Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 528, Issue 18, Pages 6059-6065Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2011.04.017
Keywords
Aluminum solid solution alloy; Equal-channel angular pressing; Grain boundary misorientations; Microstructure; Ultrafine-grains
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Funding
- Light Metals Educational Foundation of Japan
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- Kyushu University
- National Science Foundation of the United States [DMR-0855009]
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Samples of an Al-1% Mg solid solution alloy were processed by equal-channel angular pressing (ECAP) at room temperature for totals of 1-12 passes and the microstructures of the processed samples were examined using orientation imaging microscopy. The results demonstrate the alloy achieves a reasonably stable microstructure after 6 passes through the ECAP die with an ultimate equilibrium grain size of similar to 700 nm. Measurements show both the fraction of high-angle boundaries and the average boundary misorientation increase with increasing numbers of passes up to 6 passes but thereafter there is only a minor additional increase up to 12 passes. (C) 2011 Elsevier B.V. All rights reserved.
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