Towards an understanding of tensile deformation in Ti-based bulk metallic glass matrix composites with BCC dendrites

Creators: Kolodziejska, Joanna A.; Kozachkov, Henry; Kranjc, Kelly; Hunter, Allen; Marquis, Emmanuelle; Johnson, William L.; Flores, Katharine M.; Hofmann, Douglas C.

Abstract

The microstructure and tension ductility of a series of Ti-based bulk metallic glass matrix composite (BMGMC) is investigated by changing content of the β stabilizing element vanadium while holding the volume fraction of dendritic phase constant. The ability to change only one variable in these novel composites has previously been difficult, leading to uninvestigated areas regarding how composition affects properties. It is shown that the tension ductility can range from near zero percent to over ten percent simply by changing the amount of vanadium in the dendritic phase. This approach may prove useful for the future development of these alloys, which have largely been developed experimentally using trial and error.

Additional Information

© 2016 Nature Publishing Group. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. Received: 26 June 2015; Accepted: 17 February 2016; Published online: 02 March 2016. This work was supported by the Air Force Office of Scientific Research under Grant Nos. FA9550–09–1–0251 and FA9550–12–1–0059. Part of this work was done at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). Author Contributions: J.A.K., H.K. and D.C.H. performed sample fabrication, tensile tests, ultrasonic measurements, and XRD analysis. K.K. performed all nanoindentation work and SEM. A.H. performed atom probe tomography and TEM. J.A.K. and H.K. wrote the main manuscript text. J.A.K. prepared the figures and table. E.M., W.L.J., K.M.F. and D.C.H. jointly supervised the work. All authors contributed to analysis and interpretation of the data, contributed revisions to the text, and reviewed the manuscript. The authors declare no competing financial interests.

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