Crystal plasticity analysis of dislocation emission from micro voids |
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| Institution: | 1. Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI 48824, USA;2. Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA;1. Department of Aerospace Engineering, Iowa State University, Ames, IA 50011, USA;2. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA;3. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA;4. Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL 32611,USA;1. MINES ParisTech, PSL Research University, MAT – Centre des matériaux, CNRS UMR 7633, BP 87, 91003 Evry, France;2. ONERA, The French Aerospace Lab, Châtillon, France |
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| Abstract: | Slip deformation in the vicinity of a micro void in metal crystals is analyzed by a crystal plasticity technique, and the geometrically necessary dislocations, which accompany the gradient of plastic shear strain on slip systems, are evaluated. Aggregates of dislocation segments on pairs of slip systems that have the same slip directions but different slip planes exhibit a rhombus-shaped structure, and the structure is shown to be equivalent to prismatic dislocation loops of the interstitial type. Material transport and growth of voids are discussed in terms of GN dislocations. |
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