Defects and anomalies in powder bed fusion metal additive manufacturing
Metal additive manufacturing is a disruptive technology that is revolutionizing the
manufacturing industry. Despite its unrivaled capability for directly fabricating metal parts …
manufacturing industry. Despite its unrivaled capability for directly fabricating metal parts …
Laser melting modes in metal powder bed fusion additive manufacturing
In the laser powder bed fusion additive manufacturing of metals, extreme thermal conditions
create many highly dynamic physical phenomena, such as vaporization and recoil …
create many highly dynamic physical phenomena, such as vaporization and recoil …
The causal relationship between melt pool geometry and energy absorption measured in real time during laser-based manufacturing
BJ Simonds, J Tanner, A Artusio-Glimpse… - Applied Materials …, 2021 - Elsevier
During laser powder bed fusion additive manufacturing, laser power absorption is governed
by a protean pool of molten metal that can present as a highly reflective surface, a deeply …
by a protean pool of molten metal that can present as a highly reflective surface, a deeply …
Onset of periodic oscillations as a precursor of a transition to pore-generating turbulence in laser melting
Laser melting technologies in welding and additive manufacturing, such as laser powder
bed fusion, promises to revolutionize manufacturing. However, a challenge remains in …
bed fusion, promises to revolutionize manufacturing. However, a challenge remains in …
[HTML][HTML] Direct observation of crack formation mechanisms with operando Laser Powder Bed Fusion X-ray imaging
H Ghasemi-Tabasi, C de Formanoir… - Additive …, 2022 - Elsevier
Laser powder bed fusion (L-PBF) is a versatile additive manufacturing process that can print
geometrically complex metal parts for a variety of applications. However, poor control of …
geometrically complex metal parts for a variety of applications. However, poor control of …
Investigation of the transient coupling between the dynamic laser beam absorptance and the melt pool-vapor depression morphology in laser powder bed fusion …
A predictive powder-bed model has been developed using open-source environments to
investigate the coupling between the optical and the thermo-hydrodynamical phenomena for …
investigate the coupling between the optical and the thermo-hydrodynamical phenomena for …
Physics guided heat source for quantitative prediction of IN718 laser additive manufacturing processes
Challenge 3 of the 2022 NIST additive manufacturing benchmark (AM Bench) experiments
asked modelers to submit predictions for solid cooling rate, liquid cooling rate, time above …
asked modelers to submit predictions for solid cooling rate, liquid cooling rate, time above …
Absorptivity measurements during laser powder bed fusion of pure copper with a 1 kW cw green laser
G Nordet, C Gorny, Y Mayi, J Daligault, M Dal… - Optics & Laser …, 2022 - Elsevier
A 1 kW CW green laser source operating at 515 nm was used to investigate the absorptivity
of pure copper powder beds and pure copper substrates. Various interaction regimes were …
of pure copper powder beds and pure copper substrates. Various interaction regimes were …
[PDF][PDF] Physics guided heat source for quantitative prediction of IN718 laser additive manufacturing processes
Additive manufacturing (AM) processes such as laser powder bed fusion (LPBF), selective
laser melting (SLM), and directed energy deposition (DED) for metal alloys enable the …
laser melting (SLM), and directed energy deposition (DED) for metal alloys enable the …
[HTML][HTML] Elucidation of laser irradiation behaviors associated with the keyhole dynamics during laser powder bed fusion
The keyhole phenomenon, frequently found in LPBF, is critically responsible for the
formation of internal porosities which degrades the part quality. Owing to the ultra-high …
formation of internal porosities which degrades the part quality. Owing to the ultra-high …