Microstructural Stability and Tensile Properties of Nanostructured Low Carbon Steels Processed by ECAP

  1. Prof. Dr. Michael Zehetbauer3 and
  2. Prof. Ruslan Z. Valiev4
  1. Dong Hyuk Shin1 and
  2. Kyung-Tae Park2

Published Online: 28 JAN 2005

DOI: 10.1002/3527602461.ch11c

Nanomaterials by Severe Plastic Deformation

Nanomaterials by Severe Plastic Deformation

How to Cite

Shin, D. H. and Park, K.-T. (2004) Microstructural Stability and Tensile Properties of Nanostructured Low Carbon Steels Processed by ECAP, in Nanomaterials by Severe Plastic Deformation (eds M. Zehetbauer and R. Z. Valiev), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527602461.ch11c

Editor Information

  1. 3

    Institut für Materialphysik, Universität Wien, Boltzmanngasse 5, 1090 Wien, Austria

  2. 4

    Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, 12 K. Marks Str., Ufa, 450 000, Russia

Author Information

  1. 1

    Department of Metallurgy and Materials Science, Hanyang University, Ansan, Korea

  2. 2

    Division of Advanced Materials Science & Engineering, Hanbat National University, Taejon, Korea

Publication History

  1. Published Online: 28 JAN 2005
  2. Published Print: 25 FEB 2004

ISBN Information

Print ISBN: 9783527306596

Online ISBN: 9783527602469

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Keywords:

  • microstructural stability;
  • tensile properties;
  • nanostructured low carbon steels;
  • equal channel angular pressing (ECAP);
  • Pickering's equation

Summary

At present, in view of metallurgy, it is the grain refinement strengthening that is the most viable methodology to achieve an excellent combination of the ultrahigh strength and enhanced toughness in most structural metallic materials. Particularly, for the low carbon steel which is the most widely used structural material, the strength can be doubled without compositional modification when the ferrite grain size of 10 µm; is refined to 1 µm;, if the well-known Pickering's equation [1] is applied. In addition, the Pickering's equation predicts that this ferrite grain refinement results in a simultaneous decrement of the ductile-brittle transition temperature as much as 250 K. This fact initiated the recent researches on manufacturing ultrahigh strength low carbon steels with moderate ductility, toughness, weldability and extended lifetime for the use of gigantic infrastructure construction, that are being conducted vigorously as the national research projects in the world leading laboratories and steel companies.