Nanomechanical characterization of Ti-base nanostructure-dendrite composite

G. Alcalá, S. Mato, T. G. Woodcock, Jürgen Eckert, Annett Gebert, Ludwig Schultz, U. Hangen

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung

Abstract

The present work represents the first localized nanomechanical analysis of the single phases present in an alloy, providing a better understanding of the macroscopic behaviour of the material. The Ti60Cu14Ni12Sn4Nb10 and Ti60Cu14 Ni12Sn4Ta10 alloys under investigation show a very similar elastic response of the nanostructured matrix in spite of a slightly higher hardness in the latter. Nevertheless, the dendritic phase exhibits substantially higher values of hardness for both alloys, with an increase of about 32% in both cases. The elastic modulus increases by up to 36% in the Ta-containing alloy and by up to 23% in the Nb-containing alloy, compared to the matrix. The different nanomechanical response explains, together with the effect of the dendrites restricting crack propagation, the increased ductility of the Nb-containing alloy compared with the Ta-containing alloy.
OriginalspracheEnglisch
Seiten (von - bis)317-319
Seitenumfang3
FachzeitschriftInternational Journal of Materials Research
Jahrgang95.2004
Ausgabenummer5
DOIs
PublikationsstatusVeröffentlicht - 1 Mai 2004

Bibliographische Notiz

Funding Information:
The authors want to acknowledge the SURFACE company and in particular W. Stein and M. Knieps for their assistance in the nanome-chanical test. This project is funded by the European Commission under the Fifth Framework Programme, Marie Curie contract number HPMD-CT-2001-00094.

Publisher Copyright:
© 2004 Carl Hanser Verlag, München.

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