M
Muin S. Oztop
Researcher at Columbia University
Publications - 8
Citations - 392
Muin S. Oztop is an academic researcher from Columbia University. The author has contributed to research in topics: Electron backscatter diffraction & Deformation (engineering). The author has an hindex of 7, co-authored 8 publications receiving 345 citations.
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Experimental lower bounds on geometrically necessary dislocation density
TL;DR: In this article, a single nickel crystal is indented with a wedge indenter such that a two-dimensional deformation state with three effective plane strain slip systems is induced, and all non-zero components of the Nye dislocation density tensor are calculated from the lattice rotation field.
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Geometrically necessary dislocation density measurements associated with different angles of indentations
TL;DR: In this paper, numerical simulations of various angles of wedge indenters into face-centered cubic single crystal were performed under plane strain conditions, and the experiments included ang ang angles of the indenters.
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Length-scale effect due to periodic variation of geometrically necessary dislocation densities
TL;DR: In this article, a strain gradient plasticity framework is extended by incorporating the physical quantities obtained from experimental observations: the quasi-periodicity and the saturation value of dislocation densities.
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Geometrically necessary dislocation density measurements at a grain boundary due to wedge indentation into an aluminum bicrystal
TL;DR: In this paper, an aluminum bicrystal with a symmetric tilt and a coincident site lattice grain boundary was deformed plastically via wedge indentation under conditions that led to a plane strain deformation state.
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Wedge indentation into elastic–plastic single crystals. 2: Simulations for face-centered cubic crystals
TL;DR: The asymptotic stress and deformation fields associated with the contact point singularity of a nearly-flat wedge indenter impinging on a specially oriented single face-centered cubic crystal are derived analytically in a companion paper as discussed by the authors.