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Košice, Slovakia

Rosenberg G.,Ustav materialloveho vyskumu | Gasko M.,Ustav materialloveho vyskumu | Sinaiova I.,Ustav materialloveho vyskumu | Halama M.,Katedra nauky o materialoch
Chemicke Listy | Year: 2011

The coating microstructure of the hot-dip zinc galvanized interstitial free steel was investigated by metallographic analysis followed by measurement of the microhardness. Analysis of chemical composition was performed by scanning electron microscopy with energy dispersive X-ray facility (EDX). It was determined that the Fe-Al intermetallic layer in a two-layer arrangement occurs on the steel substrate/Zn interface. In accordance with data reported in the literature, the lower layer in contact with the substrate was a very small compact layer, having thickness of the order of 20∼60 nm and the upper layer comprised larger, around 400 nm in thickness. Source

Bursak M.,Katedra nauky o materialoch | Michel J.,Katedra nauky o materialoch | Janek J.,R.O.S.A. | Vojtko M.,Katedra nauky o materialoch
Chemicke Listy | Year: 2011

The contribution analyses a demotion of structure and mechanical properties of low-alloy CrMoV creep resistant steel after 265 000 operating hours by temperature 540 °C and nominal tension 44,8 MPa. Results of structural analysis and realized mechanical tests are exploited for a prediction of residual life cycle of tested steels. Source

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