Effect of local gas flow in full penetration laser beam welding with high welding speeds. - In: Applied Sciences, ISSN 2076-3417, Bd. 10 (2020), 5, 1867, S. 1-19
Spatter formation is a major issue in deep penetration welding with solid-state lasers at high welding speeds above 8 m/min. In order to limit spatter formation, the use of local gas flows represents a technically feasible solution. By using the gas flow, the pressure balance inside the keyhole, and therefore the keyhole stability, is affected. Existing investigations demonstrate a reduction in spatter and pore formation for partial penetration welding up to a welding speed of 5 m/min. However, the effect of the gas flow is not yet clarified for full penetration welding at welding speeds above 8 m/min. By using a precisely adjustable shielding gas supply, the effect of a local gas flow of argon was characterized by welding stainless steel AISI304 (1.4301/X5CrNi18-10). The influence of the gas flow on the melt pool dynamics and spatter formation was recorded by means of high-speed videography and subsequently analyzed by image processing. Schlieren videography was used to visualize the forming flow flied. By the use of the gas, a change in melt pool dynamics and gas flow conditions was observed, correlating to a reduction in loss of mass up to 70%. Based on the investigations, a model of the acting effect mechanism was given.
https://doi.org/10.3390/app10051867
Linear displacement calibration system integrated with a novel auto-alignment module for optical axes. - In: Sensors, ISSN 1424-8220, Bd. 20 (2020), 9, 2462, insges. 13 S.
https://doi.org/10.3390/s20092462
Irreversible dilation of graphite composite anodes influenced by vinylene carbonate. - In: Journal of power sources, ISSN 1873-2755, Bd. 457 (2020), 228020
https://doi.org/10.1016/j.jpowsour.2020.228020
Ultrathin Na2Ti2O4(OH)2 nanowall for boosting sodium storage. - In: Materials letters, ISSN 1873-4979, Bd. 269 (2020), S. 127649
Im Titel sind "2" und "4" tiefgestellt
https://doi.org/10.1016/j.matlet.2020.127649
Investigation of the local environment of SnO2 in an applied magnetic field. - In: Physica, ISSN 1873-2135, Bd. 586 (2020), 412120, insges. 6 S.
Im Titel ist "2" tiefgestellt
https://doi.org/10.1016/j.physb.2020.412120
Superspeed bolus visualization for vascular magnetic particle imaging. - In: IEEE transactions on medical imaging, ISSN 1558-254X, Bd. 39 (2020), 6, S. 2133-2139
https://doi.org/10.1109/TMI.2020.2965724
Localization of passive 3-D coils as an inverse problem: theoretical analysis and a numerical method. - In: IEEE transactions on magnetics, ISSN 1941-0069, Bd. 56 (2020), 4, S. 7200410, insges. 10 S.
https://doi.org/10.1109/TMAG.2020.2968858
Advances in silicon-nanoelectronics, nanostructures and high-efficiency Si-photovoltaics. - In: Physica status solidi, ISSN 1862-6319, Bd. 217 (2020), 4, S. 2000023, insges. 2 S.
Editorial
https://doi.org/10.1002/pssa.202000023
Oxygen-functionalized soft carbon nanofibers as high-performance cathode of K-ion hybrid capacitor. - In: Nano energy, ISSN 2211-2855, Bd. 72 (2020), 104661
https://doi.org/10.1016/j.nanoen.2020.104661
Experiences from treating seven adult 5q spinal muscular atrophy patients with Nusinersen. - In: Therapeutic advances in neurological disorders, ISSN 1756-2864, Bd. 13 (2020), S. 1-11
https://doi.org/10.1177/1756286420907803