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Dislocation dynamics modeling of plastic deformation in single-crystal copper at high strain rates

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      Abstract

      Tensile deformation of single-crystal copper along [001] orientation is modeled. Single crystal is deformed at three sets of high strain rates, ranging from 103 to 105 s−1, using the three-dimensional dislocation dynamics technique to simulate dislocation microstructure evolution and the resultant macroscopic response. Two initial dislocation configurations consisting of straight dislocations and Frank–Read sources are randomly distributed over the simulation volume with an edge length of 1 μm. For both initial setups, the mechanical response of the single crystal to the external loading demonstrates a considerable effect of strain rate. In addition, strain rate influences dislocation density evolution and consequently development of the dislocation microstructure. At all applied strain rates for both initial dislocation setups, dislocations evolve into a heterogeneous microstructure and this heterogeneity increases with plastic strain and strain rate.

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      Most cited references 31

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      A constitutive model for metals applicable at high‐strain rate

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        Dislocation‐mechanics‐based constitutive relations for material dynamics calculations

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          A constitutive description of the deformation of copper based on the use of the mechanical threshold stress as an internal state variable

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            Author and article information

            Affiliations
            a Department of Materials Science and Engineering, Royal Institute of Technology, Stockholm, Sweden
            b Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany
            Author notes
            [* ] Correspondence address, Arash Hosseinzadeh Delandar, PhD candidate, Royal Institute of Technology, Department of Materials Science and Engineering, Brinellvägen 23, 10044, Stockholm, Sweden, Tel.: +4687906544, E-mail: arashhd@ 123456kth.se
            Journal
            ijmr
            International Journal of Materials Research
            Carl Hanser Verlag
            1862-5282
            2195-8556
            10 November 2016
            : 107
            : 11
            : 988-995
            MK111433
            10.3139/146.111433
            © 2016, Carl Hanser Verlag, München
            Counts
            References: 32, Pages: 8
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