Enhancement of the glass forming ability of superelastic Ni-Ti-Cu-Zr-Si alloy

Jeongsoo Kim; Yongjoo Kim; Wontae Kim; Dohyang Kim

doi:10.1016/j.jallcom.2021.160730

Enhancement of the glass forming ability of superelastic Ni-Ti-Cu-Zr-Si alloy

Jeongsoo Kim, Yongjoo Kim, Wontae Kim, Dohyang Kim

Department of Materials Science and Engineering

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

2 Citations (Scopus)

Abstract

In this study, the use of (Ni_0.35Ti_0.30Cu_0.15Zr_0.20)_100−xSi_x (x = 0, 0.5, 1.0, 2.0 at%) alloy as a metallic glass precursor for a superelastic alloy, following thermoplastic forming, is investigated. The addition of Si improved the glass forming ability such that a fully amorphous sample with a thickness of ~450 µm was obtained with the x = 2.0 at% alloy. The addition of Si effectively stabilises the supercooled liquid by significantly increasing the activation energy of glass transition. The incubation time, τ, increased from 89 s for the x = 0 alloy to 346 s for the x = 2.0 at% alloy. The parameters relevant to superelastic effects, such as the maximum indentation depth (D_max) and remnant indentation depth (D_rem), remained almost constant. However, the remnant depth ratio increased slightly with the addition of Si. The fabrication of millimetre-scale Ni-Ti-Cu-Zr-Si metallic glass was achieved via the hot pressing of overlapped as-cast plates.

Original language	English
Article number	160730
Journal	Journal of Alloys and Compounds
Volume	882
DOIs	https://doi.org/10.1016/j.jallcom.2021.160730
Publication status	Published - 2021 Nov 15

Bibliographical note

Funding Information:
Funding: This work was supported by the Creative Materials Discovery Program through the National Research Foundation of Korea ( NRF ) funded by the Ministry of Science and ICT (grant number No. NRF-2019M3D1A1079215 ).

Publisher Copyright:
© 2021 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2021.160730

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title = "Enhancement of the glass forming ability of superelastic Ni-Ti-Cu-Zr-Si alloy",

abstract = "In this study, the use of (Ni0.35Ti0.30Cu0.15Zr0.20)100−xSix (x = 0, 0.5, 1.0, 2.0 at%) alloy as a metallic glass precursor for a superelastic alloy, following thermoplastic forming, is investigated. The addition of Si improved the glass forming ability such that a fully amorphous sample with a thickness of ~450 µm was obtained with the x = 2.0 at% alloy. The addition of Si effectively stabilises the supercooled liquid by significantly increasing the activation energy of glass transition. The incubation time, τ, increased from 89 s for the x = 0 alloy to 346 s for the x = 2.0 at% alloy. The parameters relevant to superelastic effects, such as the maximum indentation depth (Dmax) and remnant indentation depth (Drem), remained almost constant. However, the remnant depth ratio increased slightly with the addition of Si. The fabrication of millimetre-scale Ni-Ti-Cu-Zr-Si metallic glass was achieved via the hot pressing of overlapped as-cast plates.",

author = "Jeongsoo Kim and Yongjoo Kim and Wontae Kim and Dohyang Kim",

note = "Funding Information: Funding: This work was supported by the Creative Materials Discovery Program through the National Research Foundation of Korea ( NRF ) funded by the Ministry of Science and ICT (grant number No. NRF-2019M3D1A1079215 ). Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

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doi = "10.1016/j.jallcom.2021.160730",

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AU - Kim, Jeongsoo

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AU - Kim, Wontae

AU - Kim, Dohyang

N1 - Funding Information: Funding: This work was supported by the Creative Materials Discovery Program through the National Research Foundation of Korea ( NRF ) funded by the Ministry of Science and ICT (grant number No. NRF-2019M3D1A1079215 ). Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/11/15

Y1 - 2021/11/15

N2 - In this study, the use of (Ni0.35Ti0.30Cu0.15Zr0.20)100−xSix (x = 0, 0.5, 1.0, 2.0 at%) alloy as a metallic glass precursor for a superelastic alloy, following thermoplastic forming, is investigated. The addition of Si improved the glass forming ability such that a fully amorphous sample with a thickness of ~450 µm was obtained with the x = 2.0 at% alloy. The addition of Si effectively stabilises the supercooled liquid by significantly increasing the activation energy of glass transition. The incubation time, τ, increased from 89 s for the x = 0 alloy to 346 s for the x = 2.0 at% alloy. The parameters relevant to superelastic effects, such as the maximum indentation depth (Dmax) and remnant indentation depth (Drem), remained almost constant. However, the remnant depth ratio increased slightly with the addition of Si. The fabrication of millimetre-scale Ni-Ti-Cu-Zr-Si metallic glass was achieved via the hot pressing of overlapped as-cast plates.

AB - In this study, the use of (Ni0.35Ti0.30Cu0.15Zr0.20)100−xSix (x = 0, 0.5, 1.0, 2.0 at%) alloy as a metallic glass precursor for a superelastic alloy, following thermoplastic forming, is investigated. The addition of Si improved the glass forming ability such that a fully amorphous sample with a thickness of ~450 µm was obtained with the x = 2.0 at% alloy. The addition of Si effectively stabilises the supercooled liquid by significantly increasing the activation energy of glass transition. The incubation time, τ, increased from 89 s for the x = 0 alloy to 346 s for the x = 2.0 at% alloy. The parameters relevant to superelastic effects, such as the maximum indentation depth (Dmax) and remnant indentation depth (Drem), remained almost constant. However, the remnant depth ratio increased slightly with the addition of Si. The fabrication of millimetre-scale Ni-Ti-Cu-Zr-Si metallic glass was achieved via the hot pressing of overlapped as-cast plates.

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Enhancement of the glass forming ability of superelastic Ni-Ti-Cu-Zr-Si alloy

Abstract

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