Interdiffusion in Ternary Magnesium Solid Solutions of Aluminum and Zinc
Abstract
Al and Zn are two of the most common alloying elements in commercial Mg alloys, which can improve the physical properties through solid solution strengthening and precipitation hardening. Diffusion plays a key role in the kinetics of these and other microstructural design relevant to Mg-alloy development. However, there is a lack of multicomponent diffusion data available for Mg alloys. Through solid-to-solid diffusion couples, diffusional interactions of Al and Zn in ternary Mg solid-solution at 400° and 450 °C were examined by an extension of the Boltzmann-Matano analysis based on Onsager s formalism. Concentration profiles of Mg-Al-Zn ternary alloys were determined by electron probe microanalysis, and analyzed to determine the ternary interdiffusion coefficients as a function of composition. Zn was determined to interdiffuse the fastest, followed by Mg and Al. Appreciable diffusional interactions among Mg, Al, and Zn were observed by variations in sign and magnitude of cross interdiffusion coefficients. In particular, Zn was found to significantly influence the interdiffusion of Mg and Al significantly: the and ternary cross interdiffusion coefficients were both negative, and large in magnitude, in comparison to and , respectively. Al and Mg were observed influence the interdiffusion of Mg and Al, respectively, with positive and interdiffusionmore »
- Authors:
-
- Univ. of Central Florida, Orlando, FL (United States). Dept. of Materials Science and Engineering
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Measurement Science and Systems Engineering Division
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1324051
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Phase Equilibria and Diffusion
- Additional Journal Information:
- Journal Volume: 37; Journal Issue: 1; Journal ID: ISSN 1547-7037
- Publisher:
- ASM International
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Diffusion; Alloys; Magnesium; ternary diffusion; diffusion couples; electron probe microanalysis (EPMA); interdiffusion
Citation Formats
Kammerer, Catherine, Kulkarni, Nagraj S, Warmack, Robert J Bruce, and Sohn, Yong Ho. Interdiffusion in Ternary Magnesium Solid Solutions of Aluminum and Zinc. United States: N. p., 2016.
Web. doi:10.1007/s11669-015-0438-7.
Kammerer, Catherine, Kulkarni, Nagraj S, Warmack, Robert J Bruce, & Sohn, Yong Ho. Interdiffusion in Ternary Magnesium Solid Solutions of Aluminum and Zinc. United States. https://doi.org/10.1007/s11669-015-0438-7
Kammerer, Catherine, Kulkarni, Nagraj S, Warmack, Robert J Bruce, and Sohn, Yong Ho. Mon .
"Interdiffusion in Ternary Magnesium Solid Solutions of Aluminum and Zinc". United States. https://doi.org/10.1007/s11669-015-0438-7. https://www.osti.gov/servlets/purl/1324051.
@article{osti_1324051,
title = {Interdiffusion in Ternary Magnesium Solid Solutions of Aluminum and Zinc},
author = {Kammerer, Catherine and Kulkarni, Nagraj S and Warmack, Robert J Bruce and Sohn, Yong Ho},
abstractNote = {Al and Zn are two of the most common alloying elements in commercial Mg alloys, which can improve the physical properties through solid solution strengthening and precipitation hardening. Diffusion plays a key role in the kinetics of these and other microstructural design relevant to Mg-alloy development. However, there is a lack of multicomponent diffusion data available for Mg alloys. Through solid-to-solid diffusion couples, diffusional interactions of Al and Zn in ternary Mg solid-solution at 400° and 450 °C were examined by an extension of the Boltzmann-Matano analysis based on Onsager s formalism. Concentration profiles of Mg-Al-Zn ternary alloys were determined by electron probe microanalysis, and analyzed to determine the ternary interdiffusion coefficients as a function of composition. Zn was determined to interdiffuse the fastest, followed by Mg and Al. Appreciable diffusional interactions among Mg, Al, and Zn were observed by variations in sign and magnitude of cross interdiffusion coefficients. In particular, Zn was found to significantly influence the interdiffusion of Mg and Al significantly: the and ternary cross interdiffusion coefficients were both negative, and large in magnitude, in comparison to and , respectively. Al and Mg were observed influence the interdiffusion of Mg and Al, respectively, with positive and interdiffusion coefficients, but their influence on the Zn interdiffusion was negligible.},
doi = {10.1007/s11669-015-0438-7},
journal = {Journal of Phase Equilibria and Diffusion},
number = 1,
volume = 37,
place = {United States},
year = {Mon Jan 11 00:00:00 EST 2016},
month = {Mon Jan 11 00:00:00 EST 2016}
}
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Works referencing / citing this record:
High-Resolution Electron Microscopy and Kinetic Studies of Precipitation Hardening Reactions in Cast Al-5.8Zn-2.2Mg-2.5Cu
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