Artículos de revistas
Mobility of twin boundaries in Fe-Pd-based ferromagnetic shape memory alloys
Fecha
2016-09Registro en:
Bonifacich, Federico Guillermo; Lambri, Osvaldo Agustin F.; Pérez Landazábal, José Ignacio; Gargicevich, Damian; Recarte, Vicente; et al.; Mobility of twin boundaries in Fe-Pd-based ferromagnetic shape memory alloys; Japan Inst Metals; Materials Transactions; 57; 10; 9-2016; 1837-1844
1345-9678
CONICET Digital
CONICET
Autor
Bonifacich, Federico Guillermo
Lambri, Osvaldo Agustin F.
Pérez Landazábal, José Ignacio
Gargicevich, Damian
Recarte, Vicente
Sánchez Alarcos, Vicente
Resumen
The mobility of twin boundaries in (at.%) Fe70Pd30, Fe67Pd30Co3 and Fe66.8Pd30.7Mn2.5 has been studied by mechanical spectroscopy. Measurements were carried out in amplitude dependent damping regime. A new model based on the Friedel theory was developed to obtain the activation energy (~2 kJ/mol) for twin boundaries motion. The model describes the amplitude dependent damping from thermally assisted break-away of dislocations. Interaction processes among twin boundaries, dislocations and vacancies during the recovery of the structure are also discussed. Moreover, a damping peak related to a dislocation dragging mechanism controlled by vacancies migration without break-away, earlier reported in Fe-Pd alloys, was also found in Fe-Pd-Co and Fe-Pd-Mn alloys.