Journal
ENGINEERING FAILURE ANALYSIS
Volume 137, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfailanal.2022.106377
Keywords
Deformation-induced surface roughness; Aluminum alloys; Mesoscale; Plastic strain localization; Micromechanical simulations; Crystal plasticity
Funding
- Russian Science Foundation [20-19-00600, FWRW-2021-0002]
- Russian Science Foundation [20-19-00600] Funding Source: Russian Science Foundation
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An interrelation between mesoscale deformation-induced surface roughening and in-plane plastic strain in an aluminum alloy is revealed through experimental and numerical studies. The estimation of mesoscale surface roughness proves to be capable of evaluating the accumulated in-plane plastic strains in a loaded material.
Experimental and numerical studies are performed to reveal an interrelation between mesoscale deformation-induced surface roughening and in-plane plastic strain in an aluminum alloy. Experimentally, roughness evolution in selected subsections of a uniaxially loaded specimen is examined using a stop-and-study technique. The experimental analysis is complemented by the micromechanical simulations for deformation-induced surface roughening in model polycrystals, with special attention being given to the texture effect on roughness characteristics. The experimental and numerical roughness patterns are analyzed in terms of a relative roughness parameter calculated as a ratio of the rough profile length to the profile evaluation length. This parameter is found to correlate exponentially with in-plane plastic strain with the coefficient of determination 0.99, which implies a strong interrelation between the two quantities. The results prove the assumption that in-plane plastic strains accumulated in a loaded material can be evaluated from the estimations of mesoscale surface roughness.
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