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A molecular dynamics simulation study on Bauschinger’s effect in nano-scaled Cu systems with and without interfaces Open Access


Other title
nanoscaled copper
Bauschinger’s effect
Molecular dynamics simulation
Type of item
Degree grantor
University of Alberta
Author or creator
Zhu, Di
Supervisor and department
Li, Dongyang/Zhang, Hao (Chemical and Materials Engineering)
Examining committee member and department
Li, Dongyang (Chemical and Materials Engineering)
Ru, Chongqing (Mechanical Engineering)
Zhang, Hao (Chemical and Materials Engineering)
Narain, Ravin (Chemical and Materials Engineering)
Department of Chemical and Materials Engineering
Materials Engineering
Date accepted
Graduation date
Master of Science
Degree level
Employing the molecular dynamics simulation method, we investigated the responses of nano-scaled Cu systems, including single crystal(SC), and crystals with twin boundaries(TW) and grain boundaries(GB) to cyclic deformation in different strain ranges. Bauschinger’s effect occurring during the cyclic processes was quantified, which showed a decreasing trend in the sequence of SC, GB and TW. The simulation results show that in the nano-scaled systems the annihilation of partial dislocations with opposite signs and shrinkage of associated stacking faults could be more responsible for the Bauchinger’s effect due to the narrowed spacing between boundaries, which may confine reversible movement of generated dislocations. The suggestion is supported by changes in some crucial parameters during cyclic loading processes, such as fluctuations of absorbed strain energy, variations in the amount of defect atoms, failure strains and stress concentrations before fracture. Efforts are made to elucidate possible mechanisms responsible for the observed phenomena.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication
D. Zhu, H. Zhang, D.Y. Li. J Appl Phys 2011;110:124911.

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