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

B. B. Medeiros; M. M. Medeiros; J. Fornell; J. Sort; M. D. Baró; A. M. Jorge

doi:https://doi.org/10.1016/j.jnoncrysol.2015.05.035

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

B. B. Medeiros, M. M. Medeiros, J. Fornell, J. Sort, M. D. Baró, A. M. Jorge

Research output: Contribution to journal › Article › Research › peer-review

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Abstract

© 2015 Elsevier B.V. All rights reserved. Cu<inf>36</inf>Ti<inf>34</inf>Zr<inf>22</inf>Ni<inf>8</inf> 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<inf>r</inf> ≈90 GPa) and good wear resistance. These properties are enhanced after thermal treatments (H > 13 GPa and E<inf>r</inf> ≈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.

Original language	English
Pages (from-to)	103-109
Journal	Journal of Non-Crystalline Solids
Volume	425
DOIs	https://doi.org/10.1016/j.jnoncrysol.2015.05.035
Publication status	Published - 15 Jun 2015

Keywords

Amorphous alloys
Nanoindentation
Rapid solidification

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https://doi.org/10.1016/j.jnoncrysol.2015.05.035

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

abstract = "{\textcopyright} 2015 Elsevier B.V. All rights reserved. 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 (Er ≈90 GPa) and good wear resistance. These properties are enhanced after thermal treatments (H > 13 GPa and Er ≈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.",

keywords = "Amorphous alloys, Nanoindentation, Rapid solidification",

author = "Medeiros, {B. B.} and Medeiros, {M. M.} and J. Fornell and J. Sort and Bar{\'o}, {M. D.} and Jorge, {A. M.}",

year = "2015",

month = jun,

day = "15",

doi = "https://doi.org/10.1016/j.jnoncrysol.2015.05.035",

language = "English",

volume = "425",

pages = "103--109",

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TY - JOUR

T1 - Nanoindentation response of Cu-Ti based metallic glasses: Comparison between as-cast, relaxed and devitrified states

AU - Medeiros, B. B.

AU - Medeiros, M. M.

AU - Fornell, J.

AU - Sort, J.

AU - Baró, M. D.

AU - Jorge, A. M.

PY - 2015/6/15

Y1 - 2015/6/15

N2 - © 2015 Elsevier B.V. All rights reserved. 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 (Er ≈90 GPa) and good wear resistance. These properties are enhanced after thermal treatments (H > 13 GPa and Er ≈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.

AB - © 2015 Elsevier B.V. All rights reserved. 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 (Er ≈90 GPa) and good wear resistance. These properties are enhanced after thermal treatments (H > 13 GPa and Er ≈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.

KW - Amorphous alloys

KW - Nanoindentation

KW - Rapid solidification

U2 - https://doi.org/10.1016/j.jnoncrysol.2015.05.035

DO - https://doi.org/10.1016/j.jnoncrysol.2015.05.035

M3 - Article

VL - 425

SP - 103

EP - 109

ER -

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

Abstract

Keywords

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