20.500.12556/RUL-127244 Application of massive laser shock processing for improvement of mechanical and tribological properties The present paper aims to investigate topographical, microstructural, mechanical and tribological behaviour of precipitation hardened Al alloy subjected to massive laser shock processing (LSP) without protective coating at 2500 pulses/cm2, using three beam diameters. Wear tests under dry sliding conditions resulted in severe wear, whereas the main wear mechanisms were adhesion accompanied by abrasive wear. Nevertheless, LSP with optimal processing parameters reduce the friction coefficient and wear rate with lower degrees of adhesion and abrasion inside the wear track in comparison to the untreated sample. The enhanced tribological performance is attributed to the positive influence of LSP induced surface topography, surface compressive residual stresses (RS) and dense dislocation arrangements, as the result of high-pressure shock waves. Nonetheless, due to the narrow window of optimal parameters reduced wear resistance as a consequence of undesired thermal/softening effect due to laser ablation and melting was detected with non-optimal processing parameters. laser shock processing aluminium alloy wear microhardness residual stress microstructure lasersko udarno utrjevanje aluminijeva zlitina obraba mikrotrdota zaostale napetosti mikrostruktura true false true Angleški jezik Slovenski jezik Članek v reviji 2021-05-28 12:06:17 2021-05-28 12:06:22 2025-03-13 10:53:48 0000-00-00 00:00:00 2018 0 0 Str. 1-11 Vol. 342 May 2018 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 2017-11-15 2018-02-21 2018-03-15 2020-05-25 620.1(045) 0257-8972 10.1016/j.surfcoat.2018.02.084 15941915 RAZ_Trdan_Uros_2018.pdf RAZ_Trdan_Uros_2018.pdf 1 0C172E2D71E60C778F34C732BD7196DF 0b836d7ef8c108b240cc92a37cd54554624a37cdb1bb33ad7b51dbaee025a7b9 ddd81000-bf9d-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=143549 https://www.sciencedirect.com/science/article/pii/S0257897218302111 1 4a23bd3e-bf9c-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=143547 Fakulteta za strojništvo 0 0 0