20.500.12556/RUL-133110 Fatigue properties of maraging steel after laser peening Maraging steels are precipitation hardening steels used for highly loaded components in aeronautical and tooling industry. They are subjected to thermomechanical loads and wear, which significantly shorten their service life. Improvements of their surface mechanical properties to overcome such phenomena are of great interest. The purpose of our research was to investigate the influence of pulse density and spot size of a laser shock peening (LSP) process on the surface integrity with the fatigue resistance of X2NiCoMo18-9-5 maraging steel. Surface integrity was analyzed through roughness, residual stress, and microhardness measurements. The tests performed on resonant testing machine confirmed LSP is a promising process for increasing fatigue resistance of a component. Fatigue crack occurs, when the resonance frequency decreases. This moment, when the fatigue crack initiation phase ends and the fatigue crack propagation phase starts, was chosen as the moment of failure. We have proved LSP is a successful method in improving fatigue resistance of maraging steel by appropriate combination of laser spot size and pulse density tested in our research. microhardness residual stresses resonant fatigue resistance roughness mikrotrdota zaostale napetosti odpornost na resonančno utrujanje hrapavost true false true Angleški jezik Slovenski jezik Članek v reviji 2021-11-11 11:59:43 2021-11-11 11:59:46 2022-09-12 04:14:54 0000-00-00 00:00:00 2019 0 0 17 str. iss. 12, art. 1271 Vol. 9 Nov. 2019 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.1(045) 2075-4701 10.3390/met9121271 16961819 RAZ_Petan_Luca_2019.pdf RAZ_Petan_Luca_2019.pdf 1 E82497B82CF74F56BE51258ABADB26FE 052e78afcedf67490eb349521d3f9b84529d23e1061870bb6360a66f0d61e123 b36248b2-42de-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=150913 https://www.mdpi.com/2075-4701/9/12/1271 0 992bd790-42de-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=150912 Fakulteta za strojništvo 0 0 0