Vol. 3, No. 8, 2008

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ISSN: 1559-3959
Numerical and experimental studies of deep indentation on single crystals

Yong X. Gan, Xi Chen and Manhong Zhao

Vol. 3 (2008), No. 8, 1429–1445
Abstract

Indentation tests with large penetration depths have been used to study the plastic deformation behavior of materials. In this work, finite element simulations of wedge indentation into face-centered cubic single crystals were performed. Numerical solutions to the stresses and shear strains within the single crystals indented with a relatively large penetration depth were obtained. The crystal lattice rotation map of the indented crystals was also shown. Indentation experiments were conducted on copper crystals and the results were used to validate the numerical predictions. Comparison of the numerical solutions to the crystal lattice rotation with the experimentally measured lattice rotation map was made. The main features of the crystal lattice in-plane rotation map from the finite element simulations are also found on the map developed from the electron backscatter diffraction measurements. Both simulations and experimental measurements reveal the same dislocation structures as evidenced by the slip sectors underneath the wedge indentation zone.

Keywords
finite element simulation, indentation, plastic deformation, copper crystal, stress field, shear strain, electron backscatter diffraction, crystal lattice rotation, slip, dislocation structure
Milestones
Received: 5 February 2008
Revised: 8 May 2008
Accepted: 10 October 2008
Published: 1 October 2008
Authors
Yong X. Gan
Department of Mechanical
Industrial and Manufacturing Engineering
University of Toledo
2801 West Bancroft Street
Toledo, OH 43606
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
Manhong Zhao
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