Journal
CHINESE PHYSICS B
Volume 26, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/26/1/016402
Keywords
metallic glass; structural heterogeneity; mechanical property; secondary relaxation
Categories
Funding
- National Natural Science Foundation of China [51401192, 51611130120]
- Natural Science Foundation of Shaanxi Province, China [2016JM5009]
- Fundamental Research Funds for the Central Universities of China [3102015ZY027, 3102015BJ(II) JGZ019]
- Aeronautical Science Foundation of China [2015ZF53072]
- Hong Kong Scholar Program of China [XJ2015056]
- MINECO [FIS2014-54734-P]
- Generalitat de Catalunya [2014SGR00581]
- Research Grant Council
- Hong Kong City of China [CityU11214914]
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Understanding mechanical relaxation, such as primary (alpha) and secondary (beta) relaxation, is key to unravel the inter-twined relation between the atomic dynamics and non-equilibrium thermodynamics in metallic glasses. At a fundamental level, relaxation, plastic deformation, glass transition, and crystallization of metallic glasses are intimately linked to each other, which can be related to atomic packing, inter-atomic diffusion, and cooperative atom movement. Conceptually, beta relaxation is usually associated with structural heterogeneities intrinsic to metallic glasses. However, the details of such structural heterogeneities, being masked by the meta-stable disordered long-range structure, are yet to be understood. In this paper, we briefly review the recent experimental and simulation results that were attempted to elucidate structural heterogeneities in metallic glasses within the framework of beta relaxation. In particular, we will discuss the correlation among beta relaxation, structural heterogeneity, and mechanical properties of metallic glasses.
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