On the nature of low temperature internal friction peaks in metallic glasses

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Acta Materialia

DOI:https://doi.org/10.1016/1359-6454(95)00144-3· OSTI ID:271717

Khonik, V A ^[1]; Spivak, L V ^[2]

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1. State Pedagogical Univ., Voronezh (Russian Federation)
2. State Univ., Perm (Russian Federation)

Low temperature (30 < T < 300 K) internal friction in a metallic glass Ni{sub 60}Nb{sub 40} subjected to preliminary inhomogeneous deformation by cold rolling, homogeneous tensile deformation or electrolytic charging with hydrogen is investigated. Cold rolling or hydrogenation result in appearance of similar internal friction peaks and hysteresis damping. Homogeneous deformation has no influence on low temperature internal friction. The phenomenon of microplastic deformation during hydrogenation of weakly stressed samples is revealed. It is argued that microplastic deformation of metallic glasses during hydrogenation without external stress takes place too. Plastic flow both on cold rolling and hydrogenation occurs via formation and motion of dislocation-like defects which are the reason of the observed anelastic anomalies. It is concluded that low temperature internal friction peaks described in the literature for as-cast, cold deformed and hydrogenated samples have common dislocation-like origin.

• OSTI ID: 271717
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 1 Vol. 44; ISSN XZ504Y; ISSN 1359-6454
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COLD WORKING
DEFECTS
DEFORMATION
DISLOCATIONS
HYDROGEN
INTERMETALLIC COMPOUNDS
INTERNAL FRICTION
METALLURGICAL EFFECTS
NICKEL ALLOYS
NIOBIUM ALLOYS
PLASTICITY
ROLLING