20.500.12556/RUL-128354 Analysis and prevention of weld crater cracking in circumferential laser microwelding of automotive pressure sensors An analysis presents a weld leakage problems of automotive pressure sensor, caused by weld crater cracking. A two-beam laser welding (TBLW) was used to weld a circumferential weld, which undesirably increases the probability of weld leakage by creating two weld end craters on a single weld. Microstructural analysis showed that microsegregation of alloying elements combined with imposed strains causes solidification cracking at the weld end crater. A novel "zigzag" laser power ramp-down was used and the results showed a limited crack propagation by producing significantly shorter discontinuous cracks. In such weld crater endings the leakage is no longer an issue. two-beam laser welding continuous-wave solidification cracking weld termination regime ramp-down lap joint 17–4 PH steel Inconel 602 lasersko varjenje z dvojnim žarkom kontinuirno varjenje razpoke v vročem zaključevanje laserskih zvarov zaključna rampa prekrovni spoj 17-4 PH Inconel 602 true false true Angleški jezik Slovenski jezik Članek v reviji 2021-07-09 11:12:20 2021-07-09 11:12:24 2022-09-07 04:14:38 0000-00-00 00:00:00 2021 0 0 14 str. Vol. 128, art. 105579 Oct. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.791.725 1350-6307 10.1016/j.engfailanal.2021.105579 69793539 RAZ_Kenda_Miha_2021.pdf RAZ_Kenda_Miha_2021.pdf 1 B5A66FB1BB92DF3BA97E641771314AA6 3c67c01346c35555a522599fa8af6dbaf0654d9538a51145a018e1a63f8d87c4 425dad46-e096-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145067 https://www.sciencedirect.com/science/article/pii/S1350630721004404 1 a2d7fb5d-e095-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145066 Fakulteta za strojništvo Naravoslovnotehniška fakulteta 0 0 0