Compositional dependence of shear-band dynamics in the Zr-Cu-Al bulk metallic glass system

P. Thurnheer; R. Maaß; S. Pogatscher; J. F. Löffler

doi:10.1063/1.4867240

Compositional dependence of shear-band dynamics in the Zr-Cu-Al bulk metallic glass system

P. Thurnheer, R. Maaß, S. Pogatscher, J. F. Löffler

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Abstract

Shear-band velocities of individual shear bands in Zr_xCu _90-xAl₁₀ (x = 45-65) metallic glasses were investigated as a function of temperature and Zr-content. The apparent activation energy of the shear-band propagation dynamics increases with Zr-content, giving evidence for the sensitivity of inhomogeneous plastic flow and related time scales to chemical composition. The shear-band viscosities derived display a Zr-content trend which contrasts with equilibrium viscosities in the supercooled liquid regime. These findings are discussed in terms of effective temperature and short-range order.

Original language	English (US)
Article number	101910
Journal	Applied Physics Letters
Volume	104
Issue number	10
DOIs	https://doi.org/10.1063/1.4867240
State	Published - Mar 10 2014
Externally published	Yes

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Physics and Astronomy (miscellaneous)

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10.1063/1.4867240

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abstract = "Shear-band velocities of individual shear bands in ZrxCu 90-xAl10 (x = 45-65) metallic glasses were investigated as a function of temperature and Zr-content. The apparent activation energy of the shear-band propagation dynamics increases with Zr-content, giving evidence for the sensitivity of inhomogeneous plastic flow and related time scales to chemical composition. The shear-band viscosities derived display a Zr-content trend which contrasts with equilibrium viscosities in the supercooled liquid regime. These findings are discussed in terms of effective temperature and short-range order.",

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AU - Maaß, R.

AU - Pogatscher, S.

AU - Löffler, J. F.

PY - 2014/3/10

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N2 - Shear-band velocities of individual shear bands in ZrxCu 90-xAl10 (x = 45-65) metallic glasses were investigated as a function of temperature and Zr-content. The apparent activation energy of the shear-band propagation dynamics increases with Zr-content, giving evidence for the sensitivity of inhomogeneous plastic flow and related time scales to chemical composition. The shear-band viscosities derived display a Zr-content trend which contrasts with equilibrium viscosities in the supercooled liquid regime. These findings are discussed in terms of effective temperature and short-range order.

AB - Shear-band velocities of individual shear bands in ZrxCu 90-xAl10 (x = 45-65) metallic glasses were investigated as a function of temperature and Zr-content. The apparent activation energy of the shear-band propagation dynamics increases with Zr-content, giving evidence for the sensitivity of inhomogeneous plastic flow and related time scales to chemical composition. The shear-band viscosities derived display a Zr-content trend which contrasts with equilibrium viscosities in the supercooled liquid regime. These findings are discussed in terms of effective temperature and short-range order.

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Compositional dependence of shear-band dynamics in the Zr-Cu-Al bulk metallic glass system

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