Indentation mechanics of Cu-Be quantified by an in situ transmission electron microscopy mechanical probe

Bobji, MS and Pethica, JB and Inkson, BJ (2005) Indentation mechanics of Cu-Be quantified by an in situ transmission electron microscopy mechanical probe. In: Journal of Materials Research, 20 (10). pp. 2726-2732.

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Abstract

In situ transmission electron microscopy was used to study, in real time, the sub-surface deformation taking place in Cu-Be alloy during nanoindentation. A twinned region of the material was indented with a sharp tungsten tip in a specially developed transmission electron microscopy (TEM) holder. A flexible hinge-based force sensor was used to measure the force on the indenter, and the force-displacement curve for the tip was obtained by tracking the tip in the sequential images of a TEM video of the indentation process. Step-like structures similar to 50 nm in size resulting from the tip surface roughness were observed to generate clusters of dislocations in the sample when they come in contact with the softer Cu-Be. With this setup, the forces and the mean pressure associated with such an individual deformation event in a nanostructured TEM sample were measured.

Item Type:	Journal Article
Publication:	Journal of Materials Research
Publisher:	Materias Research Society
Additional Information:	Copyright for this article belongs to Materials Research Society.
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	30 Nov 2005
Last Modified:	19 Sep 2010 04:21
URI:	http://eprints.iisc.ac.in/id/eprint/4227

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