The ordered structure of Fe-40 at.%Al B2 powders was disordered and nanocrystallized using a high energy ball-milling. The reordering process of the originally nanocrystalline metastable alloy was investigated under continuous heating conditions and isothermal heat treatments by means of X-ray diffraction (XRD), differential scanning calorimetry (DSC) and magnetic measurements (TGM/VSM). Two different stages were identified and from the XRD data it was possible to associate the low temperature DSC peak and TGM drop to reordering and the high temperature DSC peak and TGM deflection to recrystallization and fully recovery of defects. The kinetics of the reordering process has been established and the possible mechanisms involved in the reordering process are discussed.

Kinetics of reordering in a nanograined feal alloy / S., Surinach; X., Amils; Gialanella, Stefano; Lutterotti, Luca; M., Baro'. - STAMPA. - 1997 235-238:(1997), pp. 415-420. ((Intervento presentato al convegno International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials (ISMANAM-96), tenutosi a Roma nel Maggio 1997 [10.4028/www.scientific.net/MSF.235-238.415].

Kinetics of reordering in a nanograined feal alloy

Gialanella, Stefano;Lutterotti, Luca;
1997

Abstract

The ordered structure of Fe-40 at.%Al B2 powders was disordered and nanocrystallized using a high energy ball-milling. The reordering process of the originally nanocrystalline metastable alloy was investigated under continuous heating conditions and isothermal heat treatments by means of X-ray diffraction (XRD), differential scanning calorimetry (DSC) and magnetic measurements (TGM/VSM). Two different stages were identified and from the XRD data it was possible to associate the low temperature DSC peak and TGM drop to reordering and the high temperature DSC peak and TGM deflection to recrystallization and fully recovery of defects. The kinetics of the reordering process has been established and the possible mechanisms involved in the reordering process are discussed.
Synthesis and Properties of Mechanically Alloyed and Nanocrystalline Materials
Baech
Trans Tech Publications
S., Surinach; X., Amils; Gialanella, Stefano; Lutterotti, Luca; M., Baro'
Kinetics of reordering in a nanograined feal alloy / S., Surinach; X., Amils; Gialanella, Stefano; Lutterotti, Luca; M., Baro'. - STAMPA. - 1997 235-238:(1997), pp. 415-420. ((Intervento presentato al convegno International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials (ISMANAM-96), tenutosi a Roma nel Maggio 1997 [10.4028/www.scientific.net/MSF.235-238.415].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/71860
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