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Type: Artigo de evento
Title: Hardening Mechanism Through Phase Separation Of Beta Ti-35nb-7zr-5ta And Ti-35nb-7ta Alloys
Author: Afonso C.R.M.
Ferrandini P.L.
Caram R.
Abstract: The p titanium alloys are highly attractive metallic materials for biomedical applications due to their high specific strength, high corrosion resistance and excellent biocompatibility, including low elastic modulus. The aim of this work is the evaluation of hardening mechanism through phase separation in β Ti-35Nb-7Zr-5Ta (TNZT) and Ti-35Nb-7Ta (TNT) alloys. Ingots (50 g) of TNZT and TNT alloys were arc-furnace melted in in Ar(g) atmosphere. XRD using synchrotron radiation together with TEM and HRTEM analysis showed the coexistence of two separated phases (β and β ') with similar crystalline structures and slightly different lattice parameters in TNZT and TNT alloys. It was detected a heterogeneous microstructure alternating nanosized dark and bright regions (-10 nm) with different compositions (Nb-rich β and Ta-Zr-rich (V).In aged condition (400°C/4h), TNZT and TNT alloys undergoes coherent spinodal decomposition of β phase into two solid solution phases with coherent interface, different compositions and elastic strain associated with nanometric domains of Nb-rich β and Ta-(Zr)-rich β' phases. © 2012 Materials Research Society.
Editor: Materials Research Society
Rights: fechado
Identifier DOI: 10.1557/opl.2012.1526
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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