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Multiscale Modeling of the Effect of Very Large Strain on the Microstructure Evolution and Ductility of Microalloyed Steels

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Numerical Modeling of Materials Under Extreme Conditions

Part of the book series: Advanced Structured Materials ((STRUCTMAT,volume 35))

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Abstract

This study addresses some aspects regarding mechanical behavior of bcc structures characterized by high grain refinement level developed using large plastic deformation. The fundamental mechanisms governing the behavior of the microalloyed steels at wide range of deformation conditions at nano, micro, meso-meter scale and at the continuum are discussed. Grain refinement levels, where the change in the ability of grains to strain hardening is observed, are identified with respect to the resulting changes in the meso and macro levels effects of precipitation and solid solution strengthening mechanisms. Differences in the description of strengthening mechanisms and ductility represented by maximum uniform elongation of ultrafine-grained (UFG) and nanocrystalline materials are also defined. Existing flow stress models for UFG materials are presented and their physical bases are discussed with respect to their application in the computer modeling process of mechanical behavior of bcc structures strengthened by alloying elements.

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Acknowledgments

The financial support of MNiSW (Grant no. N N508 3982 37) is gratefully acknowledged. Authors are grateful to Dr. Ł. Madej from AGH University of Science and Technology for generation FEM meshes of grained structures using DMR software.

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Authors and Affiliations

  1. AGH University of Science and Technology, Mickiewicza 30, 30-059, Krakow, Poland

    Krzysztof Muszka & Janusz Majta

Authors
  1. Krzysztof Muszka
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  2. Janusz Majta
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Correspondence to Krzysztof Muszka .

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Editors and Affiliations

  1. DICEM - Dipartimento di Ingegneria Civile e Meccanica, University of Cassino and Southern Lazio, Cassino, Italy

    Nicola Bonora

  2. Los Alamos National Laboratory, Los Alamos, USA

    Eric Brown

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Muszka, K., Majta, J. (2014). Multiscale Modeling of the Effect of Very Large Strain on the Microstructure Evolution and Ductility of Microalloyed Steels. In: Bonora, N., Brown, E. (eds) Numerical Modeling of Materials Under Extreme Conditions. Advanced Structured Materials, vol 35. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-54258-9_6

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