Microstructure and Mechanical Properties of Steels

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Vice head: Members:
  • Ing. Iveta Sinaiová
    ( mail isinaiova(at)imr.saske.sk, tel +421-55-7922 433 )

Research Area

The activity of scientific department is focused on the fundamental research of the formation and development of the microstructure of steels, especially on defining the influence of the microstructure and the chemical composition on strength, plastic and fracture properties; the prediction and determination of the service life and reliability of materials under actual operational conditions. It contributes to the theory of strength, plastic and fracture properties of mono- and multi-phased steels, including the gradient type (coated) steels. On the present the main object of the research of scientific department is focused on the development of a novel low carbon ultra-high strength steel sheets as well as on the investigation of possibilities for improvements of the relationship between strength - ductility - fatigue resistance, including utilization of the surface engineering technologies.


  • VEGA project "Fatigue Properties of Low Carbon of Advanced Ultrahigh Strength Steels " No.   2/0195/09, (2009-2011)
  • APVV project  "Design of Advanced Conceived Steels Based on Pressability Characteristics", No. APVV-0629-06, (2006-2009)
  • VEGA project "Development of Advanced Steels for Automotive Industry ", No. 2/6206/26, (2006-2008)
  • VEGA project "Influence of Phase Transformations and Chemical Composition on the Structure and Degradation of Plasticity of Low-Carbon Steels at High Temperatures", No. 2/4174/04, (2004-2006)
  • VEGA project "Zinc Protective Coatings on Steel Sheets Intended for the Automotive Industry", No. 2/3221/23, (2003-2005)


The cooperation with the practice is, in general, focused on the application of physical-metallurgical knowledge for optimatization of production procedures and technologies in the production of steel sheets and the heat treatment of products in the following areas:

  • Structural microalloyed and dual phase steels
  • Coated steels for the automotive industry, including the most progressive types of developed steels

Work within the above-mentioned areas is mainly intended for U.S. Steel Košice, s.r.o.

Selected publications

• ROSENBERG, G.: The Size of Plastic Zone and Fatigue Crack  Growth Behavior of Three Forms of Ti-6Al-2.5Mo-1.5Cr Alloy. Fatigue & Fracture of Engineering Materials & Structures,  21, 1998, p.727-739

• ROSENBERG, G.: Effect of Grain Size on the Fatigue Crack Growth in Steels at Temperatures 295 and 77K. The Iron and Steel Institute of Japan, ISIJ International, 43, 2003, 10, p.1652-1657

• ROSENBERG, G.: Fatigue Limit and Growth of Small Cracks in Notched Specimen. Metalurgija, 40, 2001, 1, p.13-18

• ROSENBERG, G.: Influence of Annealing on Structure and Fatigue Properties of Microalloyed Steel. Communication, 4, 2006, p.51-56

• DŽUPON, M - PARILÁK, L - KOLLÁROVÁ, M. - SINAIOVÁ. I.: Dual Phase Ferrite-Martenl.: Dual   Phase Ferrite-Martensitic Steel Micro-Alloyed with V-Nb. Metalurgija, 46, 2007, 1, p.15-20

IMR SAS - Watsonova 47 - 040 01 Košice - Slovakia | Tel.: +421-55-7922 402 | Fax: +421-55-7922 408 | E-mail: imrsas@imr.saske.sk