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

Séverine A.E. Boyer 1, 2, * Michel Gerland 2 Anthony Riviere 2
* Auteur correspondant
1 CEMEF - Centre de Mise en Forme des Matériaux
2 PPRIME - Institut Pprime
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.
Keywords : Manganese-rich copper-manganese alloy Point defects Dislocations Isothermal internal friction
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Article dans une revue
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01446150
Contributeur : Magalie Prudon <>
Soumis le : mercredi 25 janvier 2017 - 16:20:43
Dernière modification le : mardi 4 juin 2019 - 18:21:35

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ENSMP | INSTITUT-TELECOM | ENSMP_CEMEF | PSL | UNIV-POITIERS | PARISTECH | PPRIME

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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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