Temperature Profile, Bead Geometry, and Elemental Evaporation in Laser Powder Bed Fusion Additive Manufacturing Process

JOM ◽  
2019 ◽  
Vol 72 (1) ◽  
pp. 429-439 ◽  
Author(s):  
Faiyaz Ahsan ◽  
Leila Ladani
Keyword(s):  
Additive Manufacturing ◽  
Temperature Profile ◽  
Manufacturing Process ◽  
Bead Geometry ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed

scholarly journals A multi-scale multi-physics modeling framework of laser powder bed fusion additive manufacturing process

2018 ◽  
Vol 73 (3) ◽  
pp. 151-157 ◽  
Author(s):  
Jing Zhang ◽  
Yi Zhang ◽  
Weng Hoh Lee ◽  
Linmin Wu ◽  
Hyun-Hee Choi ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Manufacturing Process ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Modeling Framework ◽  
Powder Bed ◽  
Multi Scale ◽  
Physics Modeling

scholarly journals Types of spatter and their features and formation mechanisms in laser powder bed fusion additive manufacturing process

2020 ◽  
Vol 36 ◽  
pp. 101438
Author(s):  
Zachary A. Young ◽  
Qilin Guo ◽  
Niranjan D. Parab ◽  
Cang Zhao ◽  
Minglei Qu ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Manufacturing Process ◽  
Formation Mechanisms ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed

Assessing Manufacturing Repeatability of Inherently Damped Nickel Alloy Components via Forced-Response Testing

2019 ◽  
Author(s):  
Onome Scott-Emuakpor ◽  
Tommy George ◽  
Brian Runyon ◽  
Luke Sheridan ◽  
Casey Holycross ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Manufacturing Process ◽  
Forced Response ◽  
Shear Displacement ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Response Testing ◽  
Fabrication Parameters ◽  
Damping Capability

Abstract The ability to repeat an additive manufacturing (AM) process that fabricates a unique specimen with inherent damping capability is explored. Using the Laser Powder Bed Fusion (LPBF) AM process, four Inconel 718 components with the same internal and external geometries are manufactured. The damping performance of the four specimens are determined to make comparisons against each other, previously studied inherently damped specimens, and fully-fused components of the same material and external geometry. Results of the study demonstrate similarities in the damping performance of each beam despite the specimens being made with three different fabrication parameters, two different LPBF scan strategies, and two different build sequences. Moreover, the measured inherent damping in the four beams is significantly higher (9–16 times) compared to the damping of a fully-fused beam. The results of the inherently damped beams in this study is also compared to previous specimens of different geometries using a shear-displacement criterion that determines the effectiveness of damping. The results show an 85% correlation between damping performance and calculated shear-displacement value. Therefore, despite three sets of fabrication parameters, two scan strategies, and two build sequences for the same geometry/dimensioned specimen, the results firmly demonstrate inherent damping repeatability is strongly driven by the unique geometry of the component, which ensures repeatability with minimal sensitivity in the manufacturing process.

scholarly journals Effects on the distortion of Inconel 718 components along a hybrid laser-based additive manufacturing process chain using laser powder bed fusion and laser metal deposition

2021 ◽  
Author(s):  
Eckart Uhlmann ◽  
Jan Düchting ◽  
Torsten Petrat ◽  
Erwin Krohmer ◽  
Benjamin Graf ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Manufacturing Process ◽  
Inconel 718 ◽  
Powder Bed Fusion ◽  
Laser Metal Deposition ◽  
Process Chain ◽  
Laser Powder Bed Fusion ◽  
Plate Material ◽  
Powder Bed ◽  
Manufacturing Process Chain

AbstractThe combination of laser powder bed fusion (LPBF), known for its geometrical freedom and accuracy, and the nozzle-based laser metal deposition process (LMD), known for its high build-up rates, has great potential to reduce the additive manufacturing times for large metallic parts. For the industrial application of the LPBF-LMD hybrid process chain, it is necessary to investigate the influence of the LMD process on the LPBF substrate. In addition, the build plate material also has a significant impact on the occurrence of distortion along the additive manufacturing process chain. In the literature, steel build plates are often used in laser-based additive manufacturing processes of Inconel 718, since a good metallurgical bonding can be assured whilst reducing costs in the production and restoration of the build plates. This paper examines the distortion caused by LMD material deposition and the influence of the build plate material along the hybrid additive manufacturing process chain. Twin cantilevers are manufactured by LPBF and an additional layer is subsequently deposited with LMD. The distortion is measured in the as-built condition as well as after heat treatment. The effect of different LMD hatch strategies on the distortion is determined. The experiments are conducted using the nickel-base alloy Inconel 718. The results show a significant influence of LMD path strategies on distortion, with shorter tool paths leading to less distortion. The remaining distortion after heat treatment is considerably dependent on the material of the build plate.

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