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HomeMaterials Science ForumMaterials Science Forum Vol. 749Indenter Size Effect on the Incipient Plasticity...

Indenter Size Effect on the Incipient Plasticity of Al (001) Surface

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Abstract:

ndenter size effect on the incipient plasticity of Al (001) surface is studied by using the quasicontinuum simulation method. Two cylindrical indenters with the radii 2.5nm and 40nm are used to penetrate the surface respectively, and in displacement-control in steps of 0.02 nm. Results show that the plasticity under the small indenter is activated by discrete dislocation nucleation events, while the plasticity under the large indenter is dominated by a collective dislocation activity. Contact pressure calculations reveal that reversible incipient plasticity occurs under the small indenter, i.e. the plastically deformed surface can completely recover upon withdrawal of the indenter, while the incipient plasticity under the large indenter seems to be irreversible.

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Periodical:

Materials Science Forum (Volume 749)

Pages:

510-517

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.749.510

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Online since:

March 2013

Authors:

Yu Fei Shao, Dan Tang, Jiu Hui Li, Xing Zhao

Keywords:

Incipient Plasticity, Multiscale Simulation, Nanoindentation, Size Effect

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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