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TECHNICAL PAPERS

Prediction of Grain-Boundary Interfacial Mechanisms in Polycrystalline Materials

[+] Author and Article Information
W. M. Ashmawi, M. A. Zikry

Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695-7910

J. Eng. Mater. Technol 124(1), 88-96 (Jul 16, 2001) (9 pages) doi:10.1115/1.1421611 History: Received March 25, 2001; Revised July 16, 2001
Copyright © 2002 by ASME
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References

Figures

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Dislocation-density envelops; lp is the radial pile-up length
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(a, b) Examples of dislocation-density transmission from grain to grain-boundary to neighboring grain; (c) example of dislocation-density transmission from grain to grain-boundary only; (d) example of dislocation-density pile-up (no transmission to grain-boundary)
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General slip-plane geometric compatibility
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Polycrystalline and random crystallographic orientations
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Global stress-strain curve
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(a) Normalized immobile and (b) normalized mobile dislocation-densities at 8% nominal strain
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Accumulated plastic shear strain at 8% nominal strain
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Potential dislocation-density activity sites for slip system (1̄11)[1̄1̄0] at (a) 2% nominal strain (b) 8% nominal strain
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Potential dislocation-density activity sites in region 1 for slip system (111)[1̄01] at 8% nominal strain
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Potential dislocation-density activity sites in region 2 for slip system (111̄)[011] at 8% nominal strain

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