Characterization of yttrium-rich precipitates in a titanium alloy weld
- Materials Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899 (United States)
- Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742 (United States)
The yttrium-rich (Y-rich) precipitates that form in the fusion zone (FZ) of a Ti–5Al–1Sn–1Zr–1V–0.8Mo (wt.%) alloy, or Ti-5111, gas-tungsten arc welds (GTAW) were characterized. The filler metal was modified by a small concentration of Y in order to refine the microstructure and thus improve the FZ ductility. A high number density of nanoscale Y-rich precipitates were characterized in the weld FZ by atom probe tomography (APT) and scanning transmission electron microscopy (STEM). - Highlights: •A high number density of nanoscale precipitates were observed in the FZ matrix. •The nanoscale precipitates are enriched in yttrium. •Oxygen and sulfur are also present in the Y-rich precipitates and their interfaces.
- OSTI ID:
- 22689664
- Journal Information:
- Materials Characterization, Vol. 122; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
- Country of Publication:
- United States
- Language:
- English
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