On nanovoids formation in shear bands of an amorphous Al-based alloy

A. S. Aronin; D. V. Louzguine-Luzgin

doi:10.1016/j.mechmat.2017.07.007

On nanovoids formation in shear bands of an amorphous Al-based alloy

A. S. Aronin, D. V. Louzguine-Luzgin

Advanced Institute for Materials Research (AIMR)

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

23 Citations (Scopus)

Abstract

Shear bands play a key role in the deformation of amorphous alloys at room, low and elevated (below the glass transition) temperatures. The shear bands in the amorphous Al–Ni–Y are places of nanocrystal formation during the rolling deformation. As Al nanocrystal formation occurs by the diffusion mechanism; their composition is different from the composition of the amorphous matrix. The nanovoids formed by the coalescence of excess free volume during prolonged aging at room temperature were observed in the shear bands by transmission electron microscopy method. The obtained apparent diffusion coefficient in the shear band at room temperature of 10⁻²² m²s⁻¹ exceeds by 5–6 orders in magnitude the diffusion coefficient in the matrix.

Original language	English
Pages (from-to)	19-23
Number of pages	5
Journal	Mechanics of Materials
Volume	113
DOIs	https://doi.org/10.1016/j.mechmat.2017.07.007
Publication status	Published - 2017 Oct

Keywords

Amorphous alloy
Metallic glass
Nanovoid
Shear band

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10.1016/j.mechmat.2017.07.007

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title = "On nanovoids formation in shear bands of an amorphous Al-based alloy",

abstract = "Shear bands play a key role in the deformation of amorphous alloys at room, low and elevated (below the glass transition) temperatures. The shear bands in the amorphous Al–Ni–Y are places of nanocrystal formation during the rolling deformation. As Al nanocrystal formation occurs by the diffusion mechanism; their composition is different from the composition of the amorphous matrix. The nanovoids formed by the coalescence of excess free volume during prolonged aging at room temperature were observed in the shear bands by transmission electron microscopy method. The obtained apparent diffusion coefficient in the shear band at room temperature of 10−22 m2s−1 exceeds by 5–6 orders in magnitude the diffusion coefficient in the matrix.",

keywords = "Amorphous alloy, Metallic glass, Nanovoid, Shear band",

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AU - Aronin, A. S.

AU - Louzguine-Luzgin, D. V.

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N2 - Shear bands play a key role in the deformation of amorphous alloys at room, low and elevated (below the glass transition) temperatures. The shear bands in the amorphous Al–Ni–Y are places of nanocrystal formation during the rolling deformation. As Al nanocrystal formation occurs by the diffusion mechanism; their composition is different from the composition of the amorphous matrix. The nanovoids formed by the coalescence of excess free volume during prolonged aging at room temperature were observed in the shear bands by transmission electron microscopy method. The obtained apparent diffusion coefficient in the shear band at room temperature of 10−22 m2s−1 exceeds by 5–6 orders in magnitude the diffusion coefficient in the matrix.

AB - Shear bands play a key role in the deformation of amorphous alloys at room, low and elevated (below the glass transition) temperatures. The shear bands in the amorphous Al–Ni–Y are places of nanocrystal formation during the rolling deformation. As Al nanocrystal formation occurs by the diffusion mechanism; their composition is different from the composition of the amorphous matrix. The nanovoids formed by the coalescence of excess free volume during prolonged aging at room temperature were observed in the shear bands by transmission electron microscopy method. The obtained apparent diffusion coefficient in the shear band at room temperature of 10−22 m2s−1 exceeds by 5–6 orders in magnitude the diffusion coefficient in the matrix.

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On nanovoids formation in shear bands of an amorphous Al-based alloy

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Keywords

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