Prediction of Grain-Boundary Interfacial Mechanisms in Polycrystalline Materials

W. M. Ashmawi; M. A. Zikry

doi:10.1115/1.1421611

Journal of Engineering Materials and Technology | Volume 124 | Issue 1 | TECHNICAL PAPERS

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Prediction of Grain-Boundary Interfacial Mechanisms in Polycrystalline Materials

W. M. Ashmawi and M. A. Zikry

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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

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Dislocation-density envelops; l_p 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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(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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Ashmawi WM, Zikry MA. Prediction of Grain-Boundary Interfacial Mechanisms in Polycrystalline Materials. ASME. J. Eng. Mater. Technol. 2001;124(1):88-96. doi:10.1115/1.1421611.

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Prediction of Grain-Boundary Interfacial Mechanisms in Polycrystalline Materials

References

Figures

Dislocation-density envelops; l_p is the radial pile-up length

(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)

General slip-plane geometric compatibility

Polycrystalline and random crystallographic orientations

Global stress-strain curve

(a) Normalized immobile and (b) normalized mobile dislocation-densities at 8% nominal strain

Accumulated plastic shear strain at 8% nominal strain

Potential dislocation-density activity sites for slip system (1̄11)[1̄1̄0] at (a) 2% nominal strain (b) 8% nominal strain

Potential dislocation-density activity sites in region 1 for slip system (111)[1̄01] at 8% nominal strain

Potential dislocation-density activity sites in region 2 for slip system (111̄)[011] at 8% nominal strain

Tables

Errata

Discussions

Related Content

Journals

Conference Proceedings

eBooks

Prediction of Grain-Boundary Interfacial Mechanisms in Polycrystalline Materials

References

Figures

Dislocation-density envelops; lp is the radial pile-up length

(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)

General slip-plane geometric compatibility

Polycrystalline and random crystallographic orientations

Global stress-strain curve

(a) Normalized immobile and (b) normalized mobile dislocation-densities at 8% nominal strain

Accumulated plastic shear strain at 8% nominal strain

Potential dislocation-density activity sites for slip system (1̄11)[1̄1̄0] at (a) 2% nominal strain (b) 8% nominal strain

Potential dislocation-density activity sites in region 1 for slip system (111)[1̄01] at 8% nominal strain

Potential dislocation-density activity sites in region 2 for slip system (111̄)[011] at 8% nominal strain

Tables

Errata

Discussions

Related Content

Journals

Conference Proceedings

eBooks

Dislocation-density envelops; l_p is the radial pile-up length