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Physical and Mechanical Properties of Surface Nanocrystalline Structures Generated by Severe Thermal-Plastic Deformation

  • Hryhoriy Nykyforchyn
  • Volodymyr Kyryliv
  • Olga Maksymiv
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 156)

Abstract

Improvement of some physical and mechanical properties of surface layers of engineering steels by severe thermal-plastic deformation treatment due to high-speed friction and simultaneous rapid cooling in a special medium is analysed. Besides the structure dispersion down to nanostructure, the phase and the chemical compositions of the surface layer are modified by the treatment. It is shown that the improvement of physical and mechanical properties of the strengthened surface layer depends substantially on the coolant medium composition. Oil-base coolants provide higher microhardness, wear resistance and fatigue crack growth resistance.

Keywords

Nanocrystalline structure Steel Mechanical-pulse treatment Microhardness Wear resistance Fatigue crack growth resistance 

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Hryhoriy Nykyforchyn
    • 1
  • Volodymyr Kyryliv
    • 1
  • Olga Maksymiv
    • 1
  1. 1.Karpenko Physico-Mechanical Institute of NASULvivUkraine

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