Vol. 2, No. 3, 2007

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ISSN: 1559-3959
Cylindrical indentation induced deformation in face-centered cubic metal single crystals

Yong Xue Gan, Yuki Saito and Xi Chen

Vol. 2 (2007), No. 3, 557–572
Abstract

We investigate the deformation field induced by a cylindrical indentation on a face-centered cubic single crystal of aluminum or copper. We first present experimental measurements of the load–displacement curve and the crystal lattice rotation field (under plane strain condition) of an aluminum single crystal subject to indentation, together with related results for a copper crystal. Next, finite element simulations of the lattice rotation and displacement field associated with the cylindrical indentation are provided. The numerical and experimental results about lattice rotation features are compared with theoretical predictions based on the single crystal plasticity. Finally, the displacement fields obtained from the numerical solutions and experiments are compared. Both electron backscatter diffraction experiments using scanning electron microscopy and finite element simulations show the existence of different slip sector boundaries in the single crystals, in agreement with theoretical predictions of active slip systems and dislocation structures.

Keywords
indentation, single crystal, anisotropic plasticity, deformation field, lattice rotation map, numerical simulations
Milestones
Received: 24 July 2006
Accepted: 9 October 2006
Published: 1 May 2007
Authors
Yong Xue Gan
Department of Mechanical Engineering
Albert Nerken School of Engineering
The Cooper Union for the Advancement of Science and Art
51 Astor Place
New York, NY 10003
United States
Columbia Nanomechanics Research Center
Department of Civil Engineering and Mechanics
622 Mudd Building
Columbia University
New York, NY 10027
United States
Yuki Saito
Columbia Nanomechanics Research Center
Department of Civil Engineering and Mechanics
622 Mudd Building
Columbia University
New York, NY 10027
United States
Xi Chen
Department of Civil Engineering and Engineering Mechanics
Fu Foundation School of Engineering and Applied Science
Columbia University
500 West 120th Street
New York, NY 10027
United States