Abstract Dynamic Young modulus, torsion modulus and elastic energy dissipation were measured in Ni56.2Fe0.3Al43.1Ta0.3Mo0.1 (NiAl crystal) and Ni56.6Fe12.3Al30.2Hf0.6(Al2O3)0.3 (NiFeAl crystal). The elastic constant C′=(C11−C12)/2 has in both alloys a positive temperature derivative: (dC′/dT)>0 from 150 K up to 1300 K. The elastic energy dissipation exhibits a Debye-like peak whose activation energy is 2.36±0.05 eV in NiAl and 1.98±0.09 eV in NiFeAl. The peak is described as a Zener’s pair reorientation.
Bonetti, E., Campari, E., Casagrande, A., Pasquini, L., Sampaolesi, E. (2000). Upward modulus trend in NiAl and NiFeAl single crystals. Francesco Povolo and Elida Hermida [10.1016/S0925-8388(00)00950-6].
Upward modulus trend in NiAl and NiFeAl single crystals
Bonetti, EPrimo
Conceptualization
;Campari, E. GSecondo
Formal Analysis
;Casagrande, APenultimo
Resources
;Pasquini, LUltimo
Investigation
;Sampaolesi, EInvestigation
2000
Abstract
Abstract Dynamic Young modulus, torsion modulus and elastic energy dissipation were measured in Ni56.2Fe0.3Al43.1Ta0.3Mo0.1 (NiAl crystal) and Ni56.6Fe12.3Al30.2Hf0.6(Al2O3)0.3 (NiFeAl crystal). The elastic constant C′=(C11−C12)/2 has in both alloys a positive temperature derivative: (dC′/dT)>0 from 150 K up to 1300 K. The elastic energy dissipation exhibits a Debye-like peak whose activation energy is 2.36±0.05 eV in NiAl and 1.98±0.09 eV in NiFeAl. The peak is described as a Zener’s pair reorientation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
