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- Title
Trace Carbon Addition to Refine Microstructure and Enhance Properties of Additive-Manufactured Ti-6Al-4V.
- Authors
Mereddy, S.; Bermingham, M. J.; Dehghan-Manshadi, A.; StJohn, D. H.; Dargusch, M. S.; Kent, D.
- Abstract
Carbon is a powerful alloying element for titanium alloys. In this work, trace carbon is alloyed with Ti-6Al-4V during wire + arc additive manufacturing, and the effects on the solidification process, microstructure and mechanical properties are explored. With between 0.03 wt.% and 0.41 wt.% carbon, the prior-β grain size and α-lath length reduce by factors of 5-6 which is attributed to separate grain refining mechanisms. Alloying Ti-6Al-4V with up to 0.1 wt.% carbon improved both the tensile strength and ductility, but higher carbon additions were associated with excessive carbide formation and severe embrittlement.
- Subjects
MICROSTRUCTURE; ADDITIVES; CARBON; ALLOYS; CARBIDES
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2018, Vol 70, Issue 9, p1670
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-018-2994-x