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Grain size, stress and surface roughness
Author(s) -
Perron A.,
Politano O.,
Vignal V.
Publication year - 2008
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.2849
Subject(s) - surface roughness , grain size , surface finish , materials science , crystallite , strain (injury) , stress (linguistics) , composite material , aluminium , molecular dynamics , condensed matter physics , crystallography , metallurgy , chemistry , physics , computational chemistry , medicine , linguistics , philosophy
In this article, we report molecular dynamics (MD) simulations on the formation of roughness at the surface of strained polycrystalline aluminum samples at 300 K. The computed roughness increases as a function of applied strain but does not follow a linear law for all applied strains. A linear relationship with a small slope is obtained in the elastic domain. Then, the roughness increases rapidly with the applied strain in the plastic domain studied. Moreover, the surface roughness increases as a function of grain size (between 5 and 20 nm) in the plastic domain (<6%). Copyright © 2008 John Wiley & Sons, Ltd.