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Ioannis Bitharas
Researcher at Heriot-Watt University
Publications - 13
Citations - 521
Ioannis Bitharas is an academic researcher from Heriot-Watt University. The author has contributed to research in topics: Laser & Ablation. The author has an hindex of 5, co-authored 8 publications receiving 317 citations.
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Fluid and particle dynamics in laser powder bed fusion
TL;DR: In this paper, a combination of high-speed imaging and schlieren imaging, as well as multiphysics modeling, was employed to elucidate the effects of the interaction between the laser beam and the powder bed.
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Laser powder bed fusion in high-pressure atmospheres
TL;DR: In this article, high-speed imaging and schlieren imaging were used to investigate the interaction of the laser beam with the powder bed at pressures up to 5 bar, in argon and helium atmospheres.
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Laser powder bed fusion at sub-atmospheric pressures
TL;DR: In this article, high-speed imaging was used to investigate the interaction of the laser beam with the powder bed at sub-atmospheric pressures, where the laser plume produces a flow in the ambient atmosphere that entrains particles toward the melt pool.
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Visualisation and optimisation of shielding gas coverage during gas metal arc welding
TL;DR: In this paper, the effect of shielding gas flow rate, as well as changes in the nozzle stand-off and angle, on the weld quality was investigated using schlieren imaging, which was used to validate 2D and 3D magnetohydrodynamic finite element models of the interaction between the shielding gas, the arc and the ambient atmosphere.
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Visualisation of alternating shielding gas flow in GTAW
TL;DR: In this paper, a schlieren system was used to image density gradients that arise when alternating argon and helium shield gases, under varying flow parameters, with gas tungsten arc welding (GTAW).