Dependence of shear-induced mixing on length scale

Salman N. Arshad; Timothy G. Lach; Mohsen Pouryazdan; Horst Hahn; Pascal Bellon; Shen J. Dillon; Robert S. Averback

doi:10.1016/j.scriptamat.2012.10.027

Dependence of shear-induced mixing on length scale

Salman N. Arshad, Timothy G. Lach, Mohsen Pouryazdan, Horst Hahn, Pascal Bellon, Shen J. Dillon, Robert S. Averback

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

33 Scopus citations

Abstract

The critical strain for mixing was determined as a function of precipitate size in two-phase Cu₉₀Ag₁₀ alloys using high-pressure torsion experiments. X-ray diffraction, Z-contrast transmission electron microscopy and atom probe tomography were employed to characterize the mixing behavior. For precipitates ranging from 16 to 131 nm in radius, the critical strain increased linearly with the initial precipitate size, with the proportionality constant at ≈5.2 nm^-1. These results are in agreement with model predictions based on random dislocation glide.

Original language	English
Pages (from-to)	215-218
Number of pages	4
Journal	Scripta Materialia
Volume	68
Issue number	3-4
DOIs	https://doi.org/10.1016/j.scriptamat.2012.10.027
State	Published - Feb 2013
Externally published	Yes

Funding

The authors would like to acknowledge the financial support from National Science Foundation ( DMR 10-05813 ) to carry out this research. T. Lach was supported by the US Department of Energy, Basic Energy Sciences under Grant DOE LANL76604-001-10 (EFRC-CMIME). The APT was performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT), which is supported by the National Science Foundation’s MRSEC Program ( DMR-1121262 ). The research at TUD and KIT was financially supported by Deutsche Forschungsgemeinschaft ( HA1344/22-2 ). The authors are also grateful to the Institute of Applied Materials at KIT for access to the Schenck compression–torsion machine and to Stefan Knaak for assistance in conducting the HPT experiments.

Funders	Funder number
National Science Foundation’s MRSEC	DMR-1121262
National Science Foundation	DMR 10-05813
U.S. Department of Energy
Basic Energy Sciences	DOE LANL76604-001-10
Northwestern University
Deutsche Forschungsgemeinschaft	HA1344/22-2

Keywords

Atom probe tomography
Copper alloys
High-pressure torsion
Scanning transmission electron microscopy
Shear mixing

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title = "Dependence of shear-induced mixing on length scale",

abstract = "The critical strain for mixing was determined as a function of precipitate size in two-phase Cu90Ag10 alloys using high-pressure torsion experiments. X-ray diffraction, Z-contrast transmission electron microscopy and atom probe tomography were employed to characterize the mixing behavior. For precipitates ranging from 16 to 131 nm in radius, the critical strain increased linearly with the initial precipitate size, with the proportionality constant at ≈5.2 nm-1. These results are in agreement with model predictions based on random dislocation glide.",

keywords = "Atom probe tomography, Copper alloys, High-pressure torsion, Scanning transmission electron microscopy, Shear mixing",

author = "Arshad, {Salman N.} and Lach, {Timothy G.} and Mohsen Pouryazdan and Horst Hahn and Pascal Bellon and Dillon, {Shen J.} and Averback, {Robert S.}",

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AU - Arshad, Salman N.

AU - Lach, Timothy G.

AU - Pouryazdan, Mohsen

AU - Hahn, Horst

AU - Bellon, Pascal

AU - Dillon, Shen J.

AU - Averback, Robert S.

PY - 2013/2

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AB - The critical strain for mixing was determined as a function of precipitate size in two-phase Cu90Ag10 alloys using high-pressure torsion experiments. X-ray diffraction, Z-contrast transmission electron microscopy and atom probe tomography were employed to characterize the mixing behavior. For precipitates ranging from 16 to 131 nm in radius, the critical strain increased linearly with the initial precipitate size, with the proportionality constant at ≈5.2 nm-1. These results are in agreement with model predictions based on random dislocation glide.

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KW - High-pressure torsion

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ER -

Dependence of shear-induced mixing on length scale

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