Journal
SCRIPTA MATERIALIA
Volume 61, Issue 6, Pages 612-615Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2009.05.037
Keywords
Compression test; Tension test; Intermetallic compounds; Grain boundary cohesion; Co-based superalloys
Categories
Funding
- Japan Society for the Promotion of the Science
- CREST
- Japan Science and Technology Agency
- Global COE Project
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The mechanical properties of several B-free and B-doped Co-Al-W superalloys with different volume fractions of the CO3(Al,W)-gamma' phase were examined by mechanical tests at various temperatures up to 980 degrees C. Although grain boundary fracture occurred in the B-free alloys, the addition of a small amount of B drastically improved the ductility. It was also confirmed that the positive temperature dependence of strength was strongly affected not only by the volume fraction of the gamma' phase, but also by the addition of B. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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