Mechanical Properties and Thermal Stability of Nano-Structured Armco Iron Produced by High Pressure Torsion

  1. Prof. Dr. Michael Zehetbauer5 and
  2. Prof. Ruslan Z. Valiev6
  1. Yu. Ivanisenko1,
  2. A.V. Sergueeva2,
  3. A. Minkow1,
  4. R.Z. Valiev3 and
  5. H.-J. Fecht1,4

Published Online: 28 JAN 2005

DOI: 10.1002/3527602461.ch8c

Nanomaterials by Severe Plastic Deformation

Nanomaterials by Severe Plastic Deformation

How to Cite

Ivanisenko, Yu., Sergueeva, A.V., Minkow, A., Valiev, R.Z. and Fecht, H.-J. (2004) Mechanical Properties and Thermal Stability of Nano-Structured Armco Iron Produced by High Pressure Torsion, 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.ch8c

Editor Information

  1. 5

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

  2. 6

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

Author Information

  1. 1

    Division of Materials, Ulm University, Ulm, Germany

  2. 2

    Chemical Engineering and Material Science Department, University of California, Davis, USA

  3. 3

    Institute of Physics of Advanced Materials, State Aviation Technical University, Ufa, Russia

  4. 4

    Institute of Nanotechnology, Research Center Karlsruhe, Karlsruhe, Germany

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:

  • mechanical properties;
  • thermal stability;
  • nanostructured Armco iron;
  • high pressure torsion;
  • inverse Hall–Petch relation;
  • nanocrystalline material;
  • high pressure torsion (HPT);
  • equal channel angular pressing (ECAP)

Summary

Features of mechanical properties revealed recently in some bulk nanostructured (NS) materials such as very high strength and ductility [1], low temperature of brittle-ductile transition [2], low temperature superplasticity [3] or inverse Hall–Petch relation [4] call for more attentive investigations of such materials. In recent years, a big progress was made in investigation of NS materials prepared by means of compaction of ball milled powders [5, 6], however, such materials usually contain contamination and residual porosity. It is known, that NS materials are very sensitive to their initial microstructures. Two grades of a nanocrystalline material (same composition and structure) that are prepared by different procedures and that have a similar grain size may exhibit quite different mechanical properties [7, 8]. As a result, the existing experimental data on mechanical behaviour of the NS materials are at times ambiguous and contradictory. In that respect, the use of the methods of severe plastic deformation, such as High Pressure Torsion (HPT) and Equal Channel Angular Pressing (ECAP) is attractive, because there is a possibility to produce bulk nanostructured fully dense metals and alloys [1].

The aim of this work was to study the evolution of structure and tensile properties of nanostructured Armco iron upon heat treatment.