A lot of attention is now being given to ferromagnetic shape memory alloys (also known as MSM-- magneto strained materials) as they can be used to achieve magnetically induced strains of more than a few percent. Such high strains are related not only to the driving effect of the external magnetic field on twin plane and phase boundary movement, but also to the possibility of promoting austenite- martensite transformation. Experiments reported in the literature refer mainly to single crystal and/or thin film specimens, very few deal with polycrystals. The aim of the present work was to investigate the behavior of polycrys- talline samples. For this purpose samples with two different compositions were prepared and charac- terized by Differential Scanning Calorimetry (DSC), Scanning Electron Microscopy (SEM), Energy Dispersion Spectroscopy (EDS) and optical microscopy.
NiMnGa polycrystalline magnetically activated shape memory alloy: A calorimetric investigation
Besseghini S;Passaretti F;Villa E
2001
Abstract
A lot of attention is now being given to ferromagnetic shape memory alloys (also known as MSM-- magneto strained materials) as they can be used to achieve magnetically induced strains of more than a few percent. Such high strains are related not only to the driving effect of the external magnetic field on twin plane and phase boundary movement, but also to the possibility of promoting austenite- martensite transformation. Experiments reported in the literature refer mainly to single crystal and/or thin film specimens, very few deal with polycrystals. The aim of the present work was to investigate the behavior of polycrys- talline samples. For this purpose samples with two different compositions were prepared and charac- terized by Differential Scanning Calorimetry (DSC), Scanning Electron Microscopy (SEM), Energy Dispersion Spectroscopy (EDS) and optical microscopy.File | Dimensione | Formato | |
---|---|---|---|
prod_257039-doc_121876.pdf
solo utenti autorizzati
Descrizione: NiMnGa polycrystalline magnetically activated shape memory alloy: A calorimetric investigation
Tipologia:
Versione Editoriale (PDF)
Dimensione
368.1 kB
Formato
Adobe PDF
|
368.1 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.