from the conferences organized by TANGER Ltd.
In the past, V-ROL N steel, produced at Poldi Kladno, was used for many years for a manufacture of aircraft undercarriages, particularly for quite famous small aircraft L 410. As a result of privatisation process in the nineties and other circumstances, the V-ROL N steel, known by its very good or even excellent properties, has not been more available. Within the recent Czech research and development project MOSTA aimed at modernisation of the L 410 Turbolet aircraft, a substitution of materials previously used became an issue. The paper contains results of an extensive experimental programme aimed at comparison of the V-ROL N steelused in the past, still available for research purposes, with another steel of a similar type, VIP P-ROL N steel, manufactured in Czech Republic. The results show that in spite of that some differences in chemical composition and some mechanical properties exist, the substituting steel has encouraging properties. Aspecific attention is paid to fatigue resistance, where not only comparative fatigue S-N curves are presented, but also some aspects of fatigue damaging process and mechanisms are discussed.
Keywords: Aircraft undercarriage steel, mechanical properties, fatigue resistance, damage mechanisms© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.