Relaxation of Free Volume in Zr<SUB>50</SUB>Cu<SUB>40</SUB>Al<SUB>10</SUB> Bulk Metallic Glasses Studied by Positron Annihilation Measurements
نویسندگان
چکیده
منابع مشابه
Relaxation of bulk metallic glasses studied by mechanical spectroscopy.
The relaxational dynamics in metallic glasses (MGs) is investigated by using mechanical spectroscopy. The spectra show that in MGs there are two relaxations: (i) the α relaxation, linked to the glass transition, as observed in other classes of amorphous materials; and (ii) the β relaxation, well observed below the glass transition, with an intensity strongly dependent on the MG composition, the...
متن کاملAssessment of the fatigue transformation zone in bulk metallic glasses using positron annihilation spectroscopy
using positron annihilation spectroscopy M. Liu, R. S. Vallery, D. W. Gidley, M. E. Launey, and J. J. Kruzic Department of Physics, Randall Laboratory, University of Michigan, Ann Arbor, Michigan 48109, USA Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA Materials Science, School of Mechanical, Industrial, and Manufacturing Engineering, Oregon...
متن کاملPronounced slow β-relaxation in La-based bulk metallic glasses.
Most metallic glasses (MGs) exhibit weak evidence of slow β-relaxation in their dynamic mechanical spectroscopy spectra. In contrast to other MGs, the La-based MGs we report here show a distinct slow β-relaxation peak in the mechanical relaxation measurements. We find that the slow β-relaxation behavior can be tuned by modification of the chemical composition and fragility. The structural origi...
متن کاملStructural relaxation of Ti-based bulk metallic glasses
The enthalpy relaxation behavior of Ti41.5Cu37.5Ni7.5Zr2.5Hf5Sn5Si1 bulk metallic glass (BMG) was investigated in this study. It is found that relaxation behavior follows the general characteristics for amorphous materials: the annealing time dependence of recovery enthalpy follows a stretched exponential function with the mean relaxation time obeying an Arrhenius law. In addition, the equilibr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: MATERIALS TRANSACTIONS
سال: 2008
ISSN: 1345-9678,1347-5320
DOI: 10.2320/matertrans.maw200826