Phase transformations in pearlitic steels induced by severe plastic deformation.

Yulia Ivanisenko 2Ian MacLaren 4Xavier Sauvage 5Ruslan Z. Valiev 1Hans-Jörg Fecht 3

1. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, K.Marks St.12, Ufa 450000, Russian Federation
2. Forschungszentrum Karlsruhe, Institut für Nanotechnologie, Herrmann-von-Helmholtz-Platz 1, Karlsruhe 76344, Germany
3. Ulm University, Albert-Einstein-Allee 47, Ulm 89081, Germany
4. University of Glasgow, Department of Physics and Astronomy, Glasgow, United Kingdom
5. University of Rouen, Institute of Material Research, Saint-Etienne du Rouvray, France


An overview of the number of unusual phase transformations taking place in nanocrystalline pearlitic steels in conditions of the severe deformation, i.e. combination of high pressure and strong shear strains will be given.
Strain induced cementite dissolution is a well-documented phenomenon taking place at cold plastic deformation of pearlitic steels. Recently new results which can shed an additional light on mechanisms of this process were obtained thanks to 3D AP and HRTEM investigations of pearlitic steel following the high pressure torsion (HPT). It was shown that the process of cementite decomposition starts with depleting of carbides with carbon, which indicates that deviation of chemical composition of cementite from stoichiometric one is the main reason for thermodynamic destabilisation of cementite at plastic deformation. Important results were obtained concerning the distribution of released carbon atoms in ferrite. It was experimentally confirmed that carbon segregates to dislocations and grain boundaries of nanocrystalline ferrite.
Another unusual phase transformation taking place in nanocrystalline peartitic steel during room temperature HPT is a stress induced \alfa\-->γ\
transformation, something which never occurs at conventional deformation of coarse grained iron and carbon steels. This was concluded to have occurred due to a reverse martensitic transformation. Atomistic mechanism and thermodynamic of the transformation, as well as issues related with stability of reverted austenite will be discussed.

Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: must be provided.


Related papers
  1. Nano-Titanium for medical applications
  2. Petri Dish Generation III
  3. Mechanical properties of nanomaterials
  4. Mechanical property of nano-TiO2 dispersed Al65Cu20Ti15 amorphous/nanocrystalline matrix bulk composite prepared by mechanical alloying and high pressure sintering
  5. Development and study of nanostructured titanium alloys with enhanced fatigue properties
  6. Dissolution-precipitation of the secondary phase particles in copper-rich Cu-Cr alloys during high-pressure torsion
  7. Materials Development and Examples of TechTransfer
  8. Microstructural Evolution in Mechanical Alloying and Hot Pressing of Aluminium and 316 Stainless Steel Powder Blend
  9. Kinetic and thermodynamic factors leading to dissolution of cementite in pearlitic steel subjected to severe plastic deformation under pressure
  10. The New SPD Processing Routes to Fabricate Bulk Nanostructured Materials
  11. Deformation-induced nanocrystallization in Al-rich metallic glasses
  14. Сombined SPD techniques for fabrication of nanostructured Ti rods for medical applications
  15. Excellent mechanical properties of UFG metals and alloys, subjected to combination of severe plastic deformation methods.
  16. X-Ray investigations of the natural and artificial White Etching Layer
  17. Excellent Mechanical Properties of Nickel Processed by High Pressure Techniques
  18. Markets and Economical Aspects of Nano- and Microtechnology Related Products
  19. Diamond- an emerging material for medical and technical applications
  20. Recent progress in developing nanostructured SPD materials with unique properties
  21. Mechanical properties nanostructured iron obtained by different methods of Severe Plastic Deformation
  22. TiNi-based shape memory alloys for medical application
  23. High Performance Nanoscale Materials and Bulk Metallic Glass
  24. Microstructure of Surface Layers of Raiways After Heavy Exploatation
  25. Obtaining Amorphous and Nanocrystalline Materials by Plastic Deformation and Mechanical Alloying
  26. Nanostructured Materials from Severe Plastic Deformation under High Pressure
  27. The Strain Induced Cementite Dissolution in Carbon Steels-Experimental Facts and Theoretical Approach
  28. United Approach to the Description of Diffusion in Equilibrium and Nonequilibrium Grain Boundaries and its Application to Nanomaterials
  29. The Nanostructured Tini Shape-Memory Alloys: New Properties and Applications
  30. Effect of SPD Grain Refinement and Peculiarity of Structure and Mechanical Properties of UFG Ni

Presentation: invited oral at E-MRS Fall Meeting 2005, Symposium I, by Yulia Ivanisenko
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-04-27 14:56
Revised:   2009-06-07 00:44
© 1998-2021 pielaszek research, all rights reserved Powered by the Conference Engine