Results 11 to 20 of about 7,216 (318)
Solidification cracking of laser melted commercial-purity tungsten [PDF]
Scientific ReportsThe high melting temperature of tungsten (W) makes it an attractive candidate for energy generation applications; however, its use is limited by its poor ductility at low temperatures.
Venkata Satya Surya Amaranth Karra +9 more
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Spattering in selective laser melting : a review of spatter formation, effects and countermeasures
, 2018 Spattering is an unpreventable and largely undesired phenomenon in selective laser melting (SLM). The ejected particles from the melt pool would often deposit on the powder bed when not effectively removed by the shielding inert gas flow, leading to contamination and subsequently parts to be printed with lower quality.
Ahmad Anwar, Pham, Quang-Cuong
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Spatter formation in selective laser melting process using multi-laser technology
Materials & Design, 2017 Abstract This study demonstrates the significant role of recoil pressure in selective laser melting (SLM) process using multi-laser technology. High-speed photography is utilized to observe the formation mechanism, and also the behavior of spatter particles during SLM fabrication.
Mohsen Taheri Andani +4 more
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Mechanisms of Spatter Formation and Suppression in Aluminum Alloy via Hybrid Fiber–Semiconductor Laser System [PDF]
CoatingsThis study investigates the spatter suppression mechanism in aluminum alloy welding using a hybrid fiber–semiconductor laser system. By integrating high-speed photography and three-dimensional thermal-fluid coupling numerical simulations, the spatter formation process and its suppression mechanisms were systematically analyzed.
Jingwen Chen +6 more
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Additive Manufacturing, 2020 Abstract Spatter causes defect formation, powder redistribution and contamination in laser powder bed fusion (LPBF) additive manufacturing process. It is critical to distinguish different types of spatter and understand their features and formation mechanisms.
Zachary A. Young +9 more
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Understanding of spatter formation in fiber laser welding of 5083 aluminum alloy [PDF]
International Journal of Heat and Mass Transfer, 2017 Abstract The droplet escape condition is established, a three-dimensional numerical model is built to investigate the behavior of the weld pool in fiber laser welding of 5083 aluminum alloy, the shear stress caused by the metallic vapor flow that has great influence on spatter formation is considered.
Dongsheng Wu +3 more
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Laser welding with side-gas application and its impact on spatter formation and weld seam shape
Procedia CIRP, 2020 Abstract Spattering is a quality issue within deep penetration laser welding processes resulting in time-consuming and cost-intensive post-processing. In this study, the formation of unconventional weld shapes, e.g. with bulge formation was observed in a lap-joint, while using a side-gas jet to enlargen the capillary opening.
Goran Jovic +3 more
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Materialia, 2020 Abstract Spatter particles, created during laser powder-bed-fusion (L-PBF) additive manufacturing process of 316 L stainless steel, solidified as single-crystal, non-equilibrium, body-centered cubic (BCC) ferrite, which has not been reported before. This phenomenon is unusual considering that the composition of stainless steel 316 L typically ensures
Daniel Galicki +6 more
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High-Fidelity Numerical Modelling Of Cold Spatter Formation During Laser Powder Bed Fusion Of 316-L Stainless Steel High-Fidelity Numerical Modelling Of Cold Spatter Formation During Laser Powder Bed Fusion Of 316-L Stainless Steel [PDF]
, 2023 Spatter and denudation are two very well-known phenomena occurring mainly during the laser powder bed fusion process and are defined as ejection and displacement of powder particles, respectively. The main driver of this phenomenon is the formation of a vapor plume jet that is caused by the vaporization of the melt pool which is subjected to the laser ...
Bayat, M., Hattel, J. H.
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Procedia CIRP, 2018 Abstract The reduction of spatter formation for deep penetration laser welding with the application of welding speeds over 8 m/min is the subject of the presented proceeding. Thereby, two laser spots are spatially superposed. Due to the application of the second laser spot an enlargement of the capillary was detected.
Falk Nagel +2 more
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