Journal
SCRIPTA MATERIALIA
Volume 100, Issue -, Pages 90-93Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2014.12.022
Keywords
Ti-6Al-4V alloy; Grain boundary segregation; Auger electron spectroscopy; Ductility; Fracture
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Funding
- City University of Hong Kong [9380060, 9680031]
- National International Scientific Cooperation Program from the PR China [2010DFB53230]
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Minor amounts of boron additions have been found to greatly enhance the ductility of cast Ti-6Al-4V alloys, which was considered to be due to the grain-size refinement. In this paper, we report our interesting finding that the beneficial effect of boron on the ductility of the cast titanium alloys is due not only to the grain-size refinement but the enhancement of the prior-beta grain-boundary cohesion by boron segregation at the grain boundaries, as evidenced by Auger electron microscopy. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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