On the characteristic length scales associated with plastic deformation in metallic glasses

P Murali, YW Zhang, HJ Gao - Applied Physics Letters, 2012 - pubs.aip.org
Atomistic simulations revealed that the spatial correlations of plastic displacements in three
metallic glasses, FeP, MgAl, and CuZr, follow an exponential law with a characteristic length
scale ℓ c that governs Poisson's ratio ν⁠, shear band thickness t SB⁠, and fracture mode in
these materials. Among the three glasses, FeP exhibits smallest ℓ c⁠, thinnest t SB⁠, lowest
ν⁠, and brittle fracture; CuZr exhibits largest ℓ c⁠, thickest t SB⁠, highest ν⁠, and ductile
fracture, while properties of MgAl lie in between those of FeP and CuZr. These findings …
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