20.500.12556/RUL-127242 Effects of laser shock processing on high cycle fatigue crack growth rate and fracture toughness of aluminium alloy 6082-T651 The effects of laser shock processing without protective coating on high-cycle fatigue crack growth and fracture toughness were investigated. Laser shock peening treatment was performed on compact tension specimens from both sides perpendicular to the crack growth direction, followed by subsequent grinding. Fatigue crack growth tests were performed at frequencies between 116 and 146 Hz, at R = 0.1 and a constant stress intensity range during the fatigue crack initiation phase and K-decreasing test. A lower number of cycles was required to initiate a fatigue precrack, and faster fatigue crack growth was found in tensile residual stress field of LSP-treated specimens. The crack growth threshold decreased by 60% after LSP treatment. The fracture toughness decreased by 28-33% after LSP treatment. The fatigue-to-ductile transition boundary on fractographic surfaces show linear fatigue crack fronts in non-treated specimens and curves after LSP treatment. laser shock processing fatigue crack growth aluminium alloys residual sresses fracture toughness lasersko udarno utrjevanje rast utrujenostne razpoke aluminijeve zlitine zaostale napetosti lomna žilavost true false true Angleški jezik Slovenski jezik Članek v reviji 2021-05-28 11:05:22 2021-05-28 11:05:27 2022-09-06 03:50:19 0000-00-00 00:00:00 2016 0 0 Str. 444-455 Vol. 87 Jun. 2016 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 2015-11-25 2016-02-16 2016-03-03 2018-06-01 620.178.3:669.715(045) 0142-1123 10.1016/j.ijfatigue.2016.02.027 14539035 RAZ_Bergant_Zoran_2016.pdf RAZ_Bergant_Zoran_2016.pdf 1 35B68854D33F3868A63D5D307C7FAB30 cc0db0702d75d9aa7c64b10852868692ec14bc06dcf243277629089edf68fe18 1da839b8-bf96-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=143545 https://www.sciencedirect.com/science/article/pii/S0142112316000761?via%3Dihub 0 131f731e-bf96-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=143544 Fakulteta za strojništvo 0 0 0