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Formation of deformation substructures observed in ductile materials

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Plasticity and Beyond

Part of the book series: CISM International Centre for Mechanical Sciences ((CISM,volume 550))

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Abstract

Deformation substructures control plastic, creep, fatigue and fracture properties of ductile crystalline solids. The key ingredient of a substructure is a spontaneously formed dislocation arrangement – dislocation structure. The present notes provide 5 different, complementary points of view which present the dislocation structure formation as a multi scale phenomenon: (i) The basic concepts of dislocation theory and plasticity of single crystals and polycrystals (Section 2). (ii) A ”gallery” of commented pictures of dislocation structures as seen by a transmission electron microscope (Section 3). (iii) Discrete dislocation dynamics (Section 4). (iv) An attempt to formulate statistics of dislocations as a transition from discrete dislocation dynamics to continuum crystal plasticity capable of modeling dislocation structure formation (Section 5). (v) Two continuous models of dislocation structure formation: one dimensional model simulating a formation of vein structure and its transformation into a ladder structure of a persistent slip band (Section 6.1), and a model of misoriented dislocation cells (Section 6.2).

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Authors and Affiliations

  1. Faculty of Civil Engineering, Department of Physics, Czech Technical University, Thákurova 7, 166 29, Prague, Czech Republic

    Jan Kratochvíl

  2. Faculty of Mathematics and Physics, Charles University, Sokolovská 83, 186 75, Prague, Czech Republic

    Jan Kratochvíl

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  1. Jan Kratochvíl
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  1. University of Duisburg-Essen, Essen, Germany

    Jörg Schröder

  2. Ruhr University Bochum, Bochum, Germany

    Klaus Hackl

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Kratochvíl, J. (2014). Formation of deformation substructures observed in ductile materials. In: Schröder, J., Hackl, K. (eds) Plasticity and Beyond. CISM International Centre for Mechanical Sciences, vol 550. Springer, Vienna. https://doi.org/10.1007/978-3-7091-1625-8_4

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  • DOI: https://doi.org/10.1007/978-3-7091-1625-8_4

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