INTERNAL FRICTION BEHAVIOUR OF SOME FERROMAGNETIC AMORPHOUS ALLOYS

RdsumB- La technique du frottement intcrieur 2 basse frdquence(1Hz)a 6td utilisde afin d'dtudier les rdarrangements atomiques susceptibles d'intervenir dans les ver-res m6talliques ferromagndtiques sous l'effet de la temperature entre l'ambiante et 550°C. Pour les alliages Qtudids,tels que FeBSi,FeBSiCrC et FeNiMoB,le domaine de tem-pdrature envisage a permis de suivre les 6volutions structurales correspondant.3 la relaxation structurale et aux processus de cristallisation. L'influence d'un 6crouissane ou d'un prd-recuit a Bgalement dt6 abordde. Abstract- In order to study the atomic reorganization occurring in ferromagnetic metallic glasses under the effect of the temperature between 20 and 55O0C,internal friction experiments have been carried out on an inverted pendulum at low frequency (]Hz). For the studied alloys such as FeBSi,FeBSiCrC and FeNiMoB,the chosen temperature range permitted us to investigate the atomic configurations evolution corresponding to structural relaxation and crystallization processes. Furthermore,we studied the influence of cold-working or pre-annealing treatments on the internal friction spectra. I