Results 31 to 40 of about 7,216 (318)

Effect of Local Gas Flow in Full Penetration Laser Beam Welding with High Welding Speeds

Applied Sciences, 2020
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,
Leander Schmidt, Klaus Schricker, Jean Pierre Bergmann, Christina Junger   +3 more
doaj   +1 more source

Effects of Reduced Ambient Pressure and Beam Oscillation on Gap Bridging Ability during Solid-State Laser Beam Welding

Journal of Manufacturing and Materials Processing, 2020
In recent decades, beam welding processes have been set up as a key technology for joining applications in automotive engineering and particularly in gearbox manufacturing.
Markus Köhler, Tamás Tóth, Andreas Kreybohm, Jonas Hensel, Klaus Dilger   +4 more
doaj   +1 more source

Effect of Rare Earth Metals Added to Wire on Droplet Transfer Mode in GMAW with Pure CO2 Shielding Gas

Taiyuan Ligong Daxue xuebao, 2023
The effect of rare earth metals added to wire on droplet transfer mode in GMAW with pure CO2 shielding gas was reviewed. The results show that when the welding wire containing rare earth metals is welded with DCEN pure CO2 shielding gas, owing to the ...
Xian SUN
doaj   +1 more source

Effect of helium as process gas on laser powder bed fusion of Ti-6Al-4V studied with operando diffraction and radiography

European Journal of Materials, 2022
The utilisation of helium as process gas in laser powder bed fusion limits the generation of Ti-6Al-4V hot and incandescent spatters and enhances their cooling rate.
Camille Pauzon, Steven Van Petegem, Eduard Hryha, Cynthia Sin Ting Chang, Samy Hocine, Helena Van Swygenhoven, Charlotte de Formanoir, Sophie Dubiez-Le Goff   +7 more
doaj   +1 more source

Correlation between the spatters and evaporation vapor on the front keyhole wall during fiber laser keyhole welding

Journal of Materials Research and Technology, 2020
Severe spattering is one of the common problems during fiber laser keyhole welding. In this study, the correlation between the spatter formation and laser-induced evaporation vapor on the front keyhole wall (FKW) was studied by changing the welding speed
Gaolei Zhang, Baoqi Zhu, Jianglin Zou, Qiang Wu, Rongshi Xiao   +4 more
doaj   +1 more source

Study of spatter net forming mechanism and penetration mode under flexible ring mode laser welding

Journal of Materials Research and Technology, 2023
Flexible ring mode (FRM) laser technology can generate different powers by adjusting the power ratio of the inner and outer rings, and has great potential for welding copper and its alloys with high reflectivity. This paper used a high-speed photographic
Yang Zhang, Jieshi Chen, Wenshuai Zhang, Chuangzong Li, Chenlong Qiu, Jianwu Ding, Hao Lu, Kejin Zhang   +7 more
doaj   +1 more source

Degradation of AlSi10Mg powder during laser based powder bed fusion processing

Materials & Design, 2021
Knowledge concerning powder degradation during additive manufacturing (AM) processing is essential to improve the reusability of the powder in AM and hence maximize feedstock powder reuse and economy of the process. AlSi10Mg powder degradation in Concept
Ahmad Raza, Tobias Fiegl, Imran Hanif, Andreas MarkstrÖm, Martin Franke, Carolin Körner, Eduard Hryha   +6 more
doaj   +1 more source

Effect of concentric intensity distributions on spatter formation in full penetration welding of high-alloy steels

Procedia CIRP
Christian Diegel, Klaus Schricker, Leander Schmidt, Julius Löser, Felix Zaiß, Christian Hagenlocher, Thomas Graf, Jean Pierre Bergmann   +7 more
openaire   +2 more sources

Fossil trees, tree moulds and tree casts in the Palaeocene Mull Lava Field, NW Scotland: context, formation and implications for lava emplacement [PDF]

, 2016
Megafossils and macrofossils of terrestrial plants (trees, leaves, fruiting bodies, etc.) are found in sedimentary and pyroclastic units interbedded with lavas in many ancient lava fields worldwide, attesting to subaerial environments of eruption and the
Bell, Brian R., Williamson, Ian T.
core   +1 more source

Conduit formation and crustal microxenolith entrainment in a basaltic fissure eruption: Observations from Thríhnúkagígur Volcano, Iceland

Volcanica, 2022
Thríhnúkagígur Volcano, Iceland, is a composite spatter cone and lava field characteristic of basaltic fissure eruptions. Lava drainback at the end of the eruption left ~60 m of evacuated conduit, and a 4 × 104 m3 cave formed by the erosion of ...
Michael R Hudak, Maureen D Feineman, Peter C LaFemina, Halldór Geirsson, Samuele Agostini   +4 more
doaj   +1 more source