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A Plastic Boundary Layer in Wedge Indentation of Aluminum

Sugihara, Tatsuya and Udupa, Anirudh and Viswanathan, Koushik (2019) A Plastic Boundary Layer in Wedge Indentation of Aluminum. In: MATERIALS TRANSACTIONS, 60 (8). pp. 1436-1441.

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Official URL: https://dx.doi.org/10.2320/matertrans.MD201907


We study plastic flow in the vicinity of an indenter-material interface in wedge indentation of aluminum using high speed in situ imaging and particle image velocimetry (PIV) analysis. Displacement and strain fields in the indentation zone are obtained at high-resolution for different indenter angles and two lubrication conditions. These fields can be used to demarcate essential features of the material flow phenomena. The deformed layers close to the indenter wall fit a classical boundary layer profile in the framework of a Bingham-solid. Equivalent Bingham viscosities and boundary layer scaling relations are obtained. The viscosity values appear to reflect the nature of the friction interaction at the indenter-material interface and can potentially be used as a discriminating parameter for evaluating contributions to deformation and dissipation arising from interface friction.

Item Type: Journal Article
Additional Information: copyright for this article belongs to JAPAN INST METALS & MATERIALS
Keywords: boundary-layer; in situ imaging; metals; plasticity; interface friction
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 04 Sep 2019 05:40
Last Modified: 04 Sep 2019 05:40
URI: http://eprints.iisc.ac.in/id/eprint/63472

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