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RESEARCH PAPERS

Modeling Cyclic Deformation of HSLA Steels Using Crystal Plasticity

[+] Author and Article Information
C. L. Xie, S. Ghosh, M. Groeber

Computational Mechanics Research Laboratory, Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210

J. Eng. Mater. Technol 126(4), 339-352 (Nov 09, 2004) (14 pages) doi:10.1115/1.1789966 History: Received October 21, 2003; Revised April 06, 2004; Online November 09, 2004
Copyright © 2004 by ASME
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References

Figures

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(a) Scanning electron micrograph of the microstructure of HSLA-50 steel; (b) Distribution of grain size
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(a) Contour plot of the ODF in 3D Euler angle space, ranging from 50% to the maximum value of ODF; (b) Reduced Euler space with typical fibers and orientations of HSLA-50 steel
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Stress–strain data for uniaxial loading at four strain rates
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Schematic diagram of the specimen assembly for cyclic tension-compression tests
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Experimental and simulated stress–strain responses in the strain-controlled cyclic tests with peak strain amplitudes of (a) 0.0045; (b) 0.015
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Predicted yield point phenomena with variable reference strain rates
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Pole figures of the polycrystalline HSLA-50 from (a) from orientation imaging microscopy and (b) simulation using the orientation assignment method
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Flow chart of parameter calibration using genetic algorithms
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(a) Convergence of the GA in the minimization of initial yield stress as a function of the generation number; (b) comparison of experimental and simulated yield strengths as functions of strain rate
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Comparison of simulated and experimental stress–strain responses for (a) uniaxial tension test and (b) stress-controlled cyclic tests
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Stress–strain responses for stress controlled cyclic load testing upto 10 cycles with σmax=420.0 (MPa) and R=0.1
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Distribution of equivalent plastic under strain-controlled cyclic loading at strain amplitude of 0.0045 with (a) HSLA-50 steel texture; (b) preferred γ-fiber texture; (c) random orientation distribution
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Ratio of (a) local to average plastic strain and (b) local to average normal stress in the loading direction, as functions of the cyclic history for three different orientation distributions
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(a) Stress-controlled load histories with different waveforms; (b) accumulated microscopic and macroscopic equivalent plastic strains; (c) simulated stress–strain response in cyclic loading for material with plateau; and (d) simulated stress–strain response in cyclic loading for material without plateau
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Distribution of crystallographic misorientation: (a) Quilt-type contours plots; (b) 3D plots on section A-A
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Distribution of (a) gradient of equivalent plastic strain (mm−1); (b) stress (MPa) in the direction of loading on the section A-A; and (c) evolution of peak stress (σ22 in loading direction) along the line B-B

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