TY - JOUR
T1 - Amorphous physics and materials
T2 - Secondary relaxation and dynamic heterogeneity in metallic glasses: A brief review
AU - Qiao, J. C.
AU - Wang, Q.
AU - Crespo, D.
AU - Yang, Y.
AU - Pelletier, J. M.
N1 - Publisher Copyright:
© 2017 Chinese Physical Society and IOP Publishing Ltd.
PY - 2017/1
Y1 - 2017/1
N2 - Understanding mechanical relaxation, such as primary (α) and secondary (β) relaxation, is key to unravel the intertwined 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, β 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 β relaxation. In particular, we will discuss the correlation among β relaxation, structural heterogeneity, and mechanical properties of metallic glasses.
AB - Understanding mechanical relaxation, such as primary (α) and secondary (β) relaxation, is key to unravel the intertwined 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, β 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 β relaxation. In particular, we will discuss the correlation among β relaxation, structural heterogeneity, and mechanical properties of metallic glasses.
KW - mechanical property
KW - metallic glass
KW - secondary relaxation
KW - structural heterogeneity
UR - http://www.scopus.com/inward/record.url?scp=85013236883&partnerID=8YFLogxK
U2 - 10.1088/1674-1056/26/1/016402
DO - 10.1088/1674-1056/26/1/016402
M3 - 文献综述
AN - SCOPUS:85013236883
SN - 1674-1056
VL - 26
JO - Chinese Physics B
JF - Chinese Physics B
IS - 1
M1 - 016402
ER -