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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Nanoindentation response of Cu-Ti based metallic glasses: Comparison between as-cast, relaxed and devitrified states

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Author(s):
Medeiros, B. B. [1] ; Medeiros, M. M. [2] ; Fornell, J. [3] ; Sort, J. [3, 4] ; Baro, M. D. [3] ; Jorge Junior, A. M. [5]
Total Authors: 6
Affiliation:
[1] Univ Tecnol Fed Parana UTFPR, Dept Mech Engn, BR-85503390 Pato Branco, Parana - Brazil
[2] Univ Fed Mato Grosso UFMT, Dept Mech Engn, BR-78735901 Rondonopolis, MG - Brazil
[3] Univ Autonoma Barcelona, Dept Fis, E-08193 Barcelona - Spain
[4] Univ Autonoma Barcelona, ICREA, E-08193 Barcelona - Spain
[5] Univ Fed Sao Carlos UFSCar, Dept Mat Engn, BR-13565905 Sao Paulo - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Journal of Non-Crystalline Solids; v. 425, p. 103-109, OCT 1 2015.
Web of Science Citations: 14
Abstract

Cu36Ti34Zr22Ni8 glassy ribbons were synthesized by melting spinning. The effects of annealing treatments on the microstructure and mechanical properties of this alloy are investigated. Annealing below the crystallization temperature induces a reduction of free volume, as evidenced by differential scanning calorimetry. Annealing at sufficiently high temperatures promotes the formation of stable CuTi, NiTi and Zr-Ti-Cu phases. The as-spun alloy exhibits high hardness (H> 8 GPa), moderate reduced Young's modulus (E-r approximate to 90 GPa) and good wear resistance. These properties are enhanced after thermal treatments (H> 13 GPa and E-r approximate to 140 GPa are achieved in the fully crystallized sample). The mechanical hardening is accompanied with an increase of the elastic recovery. The influence of free volume on these annealing-induced changes in the mechanical properties is discussed. (C) 2015 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 05/59594-0 - Properties of amorphous, metastable and nano-structured metallic alloys
Grantee:Walter José Botta Filho
Support type: Research Projects - Thematic Grants