Interdiffusion in Ternary Magnesium Solid Solutions of Aluminum and Zinc

Kammerer, Catherine; Kulkarni, Nagraj S; Warmack, Robert J Bruce; Sohn, Yong Ho

doi:10.1007/s11669-015-0438-7

Title: Interdiffusion in Ternary Magnesium Solid Solutions of Aluminum and Zinc

Journal Article · Mon Jan 11 00:00:00 EST 2016 · Journal of Phase Equilibria and Diffusion

DOI:https://doi.org/10.1007/s11669-015-0438-7· OSTI ID:1324051

Kammerer, Catherine ^[1]; Kulkarni, Nagraj S ^[2]; Warmack, Robert J Bruce ^[3]; Sohn, Yong Ho ^[1]

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

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.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1324051

Journal Information:: Journal of Phase Equilibria and Diffusion, Vol. 37, Issue 1; ISSN 1547-7037

Publisher:: ASM InternationalCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

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