Internal friction and dynamic elasticity moduli on thin reeds of nanostructured Al, Fe, FeAl and Fe3Al intermetallics prepared by ball milling have been measured. A relaxational damping peak in pure metals at 350-500 K and a modulus increase at 450-500 K without appreciable grain growth has been detected. Moreover, magnetoelastic coupling dependent on grain size has been observed in iron. In the nanophase intermetallic aluminides a strong relaxational damping peak was observed in the 700-800 K range. These results are briefly discussed with reference to the anelastic behaviour of similar coarse grained materials.
Anelasticity and structural stability of nanostructured metals and compounds
DEL BIANCO, LuciaPenultimo
;
1995
Abstract
Internal friction and dynamic elasticity moduli on thin reeds of nanostructured Al, Fe, FeAl and Fe3Al intermetallics prepared by ball milling have been measured. A relaxational damping peak in pure metals at 350-500 K and a modulus increase at 450-500 K without appreciable grain growth has been detected. Moreover, magnetoelastic coupling dependent on grain size has been observed in iron. In the nanophase intermetallic aluminides a strong relaxational damping peak was observed in the 700-800 K range. These results are briefly discussed with reference to the anelastic behaviour of similar coarse grained materials.File in questo prodotto:
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