Original scientific paper

Weld joints fatigue properties of thin carbon steel sheet treated by nitrooxidation

Ivan Michalec ; Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Institute of Production Technologies, Paulínska 16, 91701 Trnava, Slovakia
Milan Marônek orcid.org/0000-0002-4716-8092 ; Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Institute of Production Technologies, Paulínska 16, 91701 Trnava, Slovakia
Jozef Bárta orcid.org/0000-0003-0607-4433 ; Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Institute of Production Technologies, Paulínska 16, 91701 Trnava, Slovakia
František Nový ; University of Žilina, Faculty of Mechanical Engineering, Department of Materials Engineering, Univerzitná 1, 010 26 Žilina, Slovakia

Abstract

Low carbon steel DC 01 (EN 10130-91) treated by the process of nitrooxidation significantly increased its mechanical properties as well as the resistance to atmospheric corrosion. The high increase was due to the presence of the surface nitridic and oxidic layers. Previous outcomes dealt with suggesting a suitable welding method for steel sheets treated in this way, the solid-state laser beam welding being marked as the most suitable. The aim of this paper was to determine the fatigue properties of laser beam welded joints of material treated by nitrooxidation. The fractographic analysis was carried out as well. The fatigue tests were carried out under bending load with frequency of 20 kHz and sinusoidal symmetric cycle. The results proved that the process of nitrooxidation had a great positive effect on the weld joints ultimate fatigue properties.

Keywords

nitrooxidation; fatigue; S-N diagram

Hrčak ID:

79159

URI

https://hrcak.srce.hr/79159

Publication date:

29.3.2012.

Article data in other languages: croatian

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