Results 51 to 60 of about 13,222 (282)
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 +3 more
doaj +1 more source
Spatter reduction by multi-beam illumination in laser powder-bed fusion
Materials & Design, 2021 Modulation of laser radiation is a promising approach to increase the process speed in laser powder-bed fusion. However, with an increased buildup rate, the preservation of product quality must be guaranteed.
Marcel Slodczyk +4 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.The study investigates novel semi‐finished products made of unidirectionally arranged hemp or pineapple leaf fiber‐reinforced composites produced from different matrices. The materials are analyzed in terms of their mechanical and interfacial properties and void content.
Nina Graupner +22 more
wiley +1 more source
Investigations of the Absorption Front in High-Speed Laser Processing Up to 600 m/min
Applied Sciences, 2021 High processing speeds enormously enlarge the number of possible fields of application for laser processes. For example, material removal for sheet cutting using multiple passes or precise mass corrections can be achieved by means of spatter formation ...
Peter Hellwig +2 more
doaj +1 more source
A computational fluid dynamic analysis of the effect of weld nozzle geometry changes on shielding gas coverage during gas metal arc welding [PDF]
, 2013 Three geometry changes to the inner bore of a welding nozzle and their effects on weld quality during gas metal arc welding (GMAW) were investigated through the use of computational fluid dynamic (CFD) models and experimental trials. It was shown that an
Campbell, Stuart +3 more
core +1 more source
Advanced Engineering Materials, EarlyView.High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé +5 more
wiley +1 more source
Oxygen balance during laser powder bed fusion of Alloy 718
Materials & Design, 2021 The generation of spatters during laser powder bed fusion (L-PBF) of Alloy 718 is known to be detrimental for the re-use of the feedstock powder and the quality of the final product.
Camille Pauzon +3 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.This study investigates the tribological response of 60NiTi alloy under dry, water‐lubricated and high‐temperature conditions. The alloy exhibits decreasing wear volume and friction with increasing temperature due to the formation of protective oxide layers. The work clarifies dominant wear mechanisms and demonstrates the suitability of 60NiTi for high‐
Anthony Onyebuchi Okoani +2 more
wiley +1 more source
Modelling of bubble nucleation in trachy-phonolitic magmas: implications for the dynamics of ash-rich eruptions [PDF]
, 2012 Nucleation of water gas bubbles in trachyphonolitic magmatic melts has been investigated integrating theory and numerical modelling with decompression experiments and analysis of natural ash samples of explosive eruptions.
Colucci, Simone
core +1 more source
Estudios Geologicos, 2014 El volcán Las Herrerías (Bolaños de Calatrava; Región Volcánica del Campo de Calatrava) se caracteriza por una gran cantidad y variedad de depósitos originados a partir de fuentes de lava.
F. Sarrionandia +3 more
doaj +1 more source