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Dynamic Mechanical Analysis of Pure Mg and Mg AZ31 Alloy

Published

Author(s)

A -. Munitz, D -. Dayan, David J. Pitchure, Richard E. Ricker

Abstract

Dynamic mechanical analyses were performed on pure Mg and Mg AZ31 alloy to study the impact of thermo-mechanical state and grain structure on the complex modulus (E*=E'+iE). The storage modulus (E') of pure Mg was found to be (40.0+2.5) GPa and indpendent of grain size. A thermally activated loss modulus (E) peak with an activation energy of (1.40+0.15)eV, which is very close to the activation energy of Mg self diffusion (1.40+0.04)eV, was observed and attributed to a grain boundary relaxation mechanism. The temperature of this peak depends on orientation with respect to direction of solidification as well as on heat treatment. The behavior of Mg AZ31 alloy was similar to that of pure Mg. The storage modulus determined for this alloy was (42.0+2.5) GPa and it was indpendent of rolling direction. The thermally activated peak in Mg AZ31 was sharper and was observed at lower temperatures (167oC-174oC) with activation energy of (1.72+0.04)eV.
Proceedings Title
Magnesium Technology|133|Magnesium Technology|The Minerals, Metals &--------------------------------------------------------------------------------Session Chairs: Xin Wu, Wayne State UniversityEric Nyberg, Pacific Northwest National Laboratory
Conference Dates
March 14-18, 2004
Conference Location
Undefined
Conference Title
Proceedings of TMS

Keywords

dynamic mechanical analysis, frequency effects, internal friction, magnesium, magnesium alloy, temperature effects, Young's modulus

Citation

Munitz, A. , Dayan, D. , Pitchure, D. and Ricker, R. (2004), Dynamic Mechanical Analysis of Pure Mg and Mg AZ31 Alloy, Magnesium Technology|133|Magnesium Technology|The Minerals, Metals &--------------------------------------------------------------------------------Session Chairs: Xin Wu, Wayne State UniversityEric Nyberg, Pacific Northwest National Laboratory, Undefined, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=853311 (Accessed February 27, 2024)
Created March 31, 2004, Updated October 12, 2021