Fatigue and Wear Properties of Nano-Particles Alloyed Steels

JENKO, DARJA; PODGORNIK, BOJAN; PRIETO, GERMÁN; KRAčUN, ANNA ; TUCKART, WALTER ROBERTO

Ciudad Autónoma de Buenos Aires

Workshop; 4th International workshop of tribology - TRIBaires 2017; 2017

Asociación Argentina de Tribología

In the last decades, considerable efforts are made in the development of high and even ultra-high performance steels. Part of the demand is due to needs for more compact design and cost reduction in the automotive industry and part due to environmental concerns. The environmental aspect is related to reduced CO2 emission and improved fuel consumption. In this respect, using lighter components and reducing vehicle weight is one of the key elements. However, lighter components require high strength materials where improvement in strength should not degrade other properties such as toughness, fatigue and wear resistance. Moreover, keeping high reliability is the first priority.Current focus in high strength steel design is on the manipulation of microstructure at the nano-scale through innovative processing techniques and adoption of novel alloying strategies, with the final steel properties mainly depending on the type, size, shape, stability and uniformity of the precipitated particles. In the case of microalloying strength of the steel is enhanced through the formation of fine stable carbides, nitrides or carbo-nitrides. However, exceptional progress in the field of nanotechnologies offers further possibilities in modifying steel microstructure through nano-particles incorporation.The aim of this work was to investigate the possibility and effect of nano-particles on high-strength steel properties, when applied in a low-cost conventional casting process.