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Isochronal shear stress relaxation and recovery of bulk and ribbon glassy Pd40Cu30Ni10P20

✍ Scribed by Nguyen, N. T. N. ;Khonik, S. V. ;Khonik, V. A.

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
733 KB
Volume
206
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

Measurements of torque relaxation upon isochronal (= linear) heating of bulk and ribbon glassy Pd~40~Cu~30~Ni~10~P~20~ differing ∼10^4^‐fold in the production quenching rates have been performed. It has been found that torque relaxation in bulk samples is notably faster than that in the ribbons despite the fact that the former are denser. Preannealing at a temperature T~a~ strongly decreases the relaxation rate at all temperatures T ≀ T~a~ and shifts the relaxation curves towards higher temperatures similarly in bulk and ribbon samples. The relaxation law has been determined. It has been revealed that rapid quenching of thermally aged samples from the supercooled liquid state recovers the ability to plastic flow. (Β© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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