20.500.12556/DKUM-86434 Experimental and numerical analysis of fracture mechanics behavior of heterogeneous zones in S690QL1 grade high strength steel (HSS) welded joint The heterogeneity of welded joints’ microstructure affects their mechanical properties, which can vary significantly in relation to specific weld zones. Given the dimensional limitations of the available test volumes of such material zones, the determination of mechanical properties presents a certain challenge. The paper investigates X welded joint of S690QL1 grade high strength steel (HSS), welded with slightly overmatching filler metal. The experimental work is focused on tensile testing to obtain stress-strain properties, as well as fracture mechanics testing. Considering the aforementioned limitations of the material test volume, tensile testing is carried out with mini tensile specimens (MTS), determining stress-strain curves for each characteristic weld zone. Fracture mechanical testing is carried out to determine the fracture toughness using the characteristic parameters. The experimental investigation is carried out using the single edge notch bend (SENB) specimens located in several characteristic welded joint zones: base metal (BM), heat affected zone (HAZ), and weld metal (WM). Fractographic analysis provides deeper insight into crack behavior in relation to specific weld zones. The numerical simulations are carried out in order to describe the fracture behavior of SENB specimens. Damage initiation and evolution is simulated using the ductile damage material behavior. This paper demonstrates the possibility of experimental and numerical determination of fracture mechanics behavior of characteristic heterogeneous welded joint zones and their influence on crack path growth. heterogeneous welded joint high strength steel mechanical testing damage fracture mechanical properties finite element analysis heterogeni zvarni spoji visokotrdnostno jeklo mehansko preizkušanje poškodbe materiala mehanika loma mehanske lastnosti analiza končnih elementov true false true MDPI Angleški jezik Slovenski jezik https://www.mdpi.com/ Članek v reviji 2023-11-30 12:35:29 2023-11-30 12:46:20 2024-04-05 12:16:33 0000-00-00 00:00:00 2023 0 0 31 str. iss. 21, [article no.] 6929 Vol. 16 Oct. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2023-10-03 2023-10-24 2023-10-28 539.42:621.791 171432195 10.3390/ma16216929 1996-1944 materials-16-06929-v2_(1).pdf materials-16-06929-v2_(1).pdf 1 F4C02538785B848B4B812CC1A64326EB b764dd4245a2b69359b0e119eb310295f1ee0d309897e5a35bf487abe45ef0ba 470d3d80-8f75-11ee-8acd-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=174458 https://www.mdpi.com/1996-1944/16/21/6929 0 5703b710-8f75-11ee-8acd-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=174459 Fakulteta za strojništvo 0 0 0