Croatian Union of Mechanical Engineers and Naval Architects
Abstract
Mehaničkim, metalografskim i SEM ispitivanjima proučavan je utjecaj vodika na krhkost modernih visokočvrstih dvofaznih DP- i višefaznih TRIP-čelika. Rezultati proučavanja mikrostrukturnih i mehaničkih svojstava termomehanički obrađenih TMCP-čelika prije i nakon navodičenja ukazali su na činjenicu da je TRIP-čelik otporniji na vodikovu krhkost, o čemu svjedoči njegova sitnozrnata mikrostruktura bez pukotina te nepromijenjene vrijednosti za mehanička svojstva nakon navodičenja.By mechanical testing, metallographic and SEM analyses, the influence of hydrogen on the frangibility of modern high-strength dual phase DP- and multiphase TRIP-steels was studied. Results of studying of microstructural and mechanical properties of thermomechanically controlled processed TMCP-steels before and after hydrogenation indicate that TRIP-steel has higher resistance to HE, which can be seen from its fine-grained microstructure with no cracks and also from unchanged mechanical performances after hydrogenation
