TY - JOUR

T1 - Nanomechanical characterization of Ti-base nanostructure-dendrite composite

AU - Alcalá, G.

AU - Mato, S.

AU - Woodcock, T. G.

AU - Eckert, Jürgen

AU - Gebert, Annett

AU - Schultz, Ludwig

AU - Hangen, U.

N1 - Publisher Copyright: © 2004 Carl Hanser Verlag, München.

PY - 2004/5/1

Y1 - 2004/5/1

N2 - 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.

AB - 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.

KW - Enhanced plasticity

KW - Nano-indentation

KW - Nanostructure-dendrite composite

KW - TiCuNiSnNb

KW - TiCuNiSnTa

UR - http://www.scopus.com/inward/record.url?scp=85124590589&partnerID=8YFLogxK

U2 - 10.1515/ijmr-2004-0068

DO - 10.1515/ijmr-2004-0068

M3 - Article

AN - SCOPUS:85124590589

VL - 95.2004

SP - 317

EP - 319

JO - International Journal of Materials Research

JF - International Journal of Materials Research

SN - 1862-5282

IS - 5

ER -