Abstract
Studying the primary α- and secondary β-relaxation process has contributed significantly to the understanding of the structure and rheology of metallic glasses. In this letter, we report on a third relaxation mechanism indicated by a maximum in the loss modulus at low temperatures, which we term γ-relaxation. Contrary to the α- and β-relaxation mechanisms, this irreversible, low energy excitation causes a macroscopic rejuvenation, which we assign to non-affine atomic rearrangements in the matrix that are driven by thermal stresses during cooling. Observed in three different glassy alloys, the low temperature relaxation is identified as a general process in metallic glasses.
Original language | English (US) |
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Pages (from-to) | 5-8 |
Number of pages | 4 |
Journal | Scripta Materialia |
Volume | 137 |
DOIs | |
State | Published - Aug 1 2017 |
Keywords
- Mechanical spectroscopy
- Metallic glasses
- Rejuvenation
- Relaxation
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys