Mobility of twin boundaries in Fe-Pd-based ferromagnetic shape memory alloys

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.

Palabras clave: Damping , Ferromagnetic Shape Memory Alloys , Iron-Palladium Based Alloys , Martensitic Transformation , Twin Boundary

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Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)

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URI: http://hdl.handle.net/11336/50586

DOI: http://dx.doi.org/10.2320/matertrans.M2016243

URL: https://www.jstage.jst.go.jp/article/matertrans/57/10/57_M2016243/_article

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Articulos de CTRO.CIENTIFICO TECNOL.CONICET - ROSARIO

Citación

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

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