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Thermally-activated anelastic relaxation in a high-manganese Cu-Mn alloy studied by isothermal low-frequency internal friction

Abstract : Low-frequency internal friction study has been conducted for a copper-manganese-rich alloy (Cu-60 at%, γ Mn). The study used a forced torsion pendulum working in low-frequency scans at constant temperatures, damping experiments ranging between 40 Hz and 10−4 Hz. The dependence on temperature was extended from room temperature to the spinodal curve frontier at 923 K. Phenomenological stages in anelastic relaxations of (Cu, γ Mn) were evidenced. Three thermally activated relaxation peaks were assigned respectively to point defects (Zener relaxation), dislocation segments and dislocation walls.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01446150
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Submitted on : Wednesday, January 25, 2017 - 4:20:43 PM
Last modification on : Monday, January 4, 2021 - 1:32:02 PM

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Séverine A.E. Boyer, Michel Gerland, Anthony Riviere. Thermally-activated anelastic relaxation in a high-manganese Cu-Mn alloy studied by isothermal low-frequency internal friction. Materials Science and Engineering: A, Elsevier, 2017, 685, pp.139 - 144. ⟨10.1016/j.msea.2016.12.120⟩. ⟨hal-01446150⟩

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