| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Hermsdorf, Jörg
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (51/51 displayed)
- 2024Development of a Laser Double-wire Directed Energy Deposition Process for Functionally Graded Materials and In-situ alloying
- 2024Optimization of process parameters for TMPS lattice structures
- 2023Intermixing behavior of 1.4430 stainless steel and 1.4718 valve steel in <i>in situ</i> alloying using coaxial laser double-wire laser directed energy depositioncitations
- 2023Influence of shielding gas coverage during laser hot-wire cladding with high carbon steelcitations
- 2023Application of the ABA cladding technique to a wire based laser cladding processcitations
- 2023Laser-Assisted Flux-Cored Arc Welding Underwatercitations
- 2023Investigations on laser beam welding of thin aluminum foils with additional filler wirecitations
- 2023Laser beam welding of brass with combined core and ring beamcitations
- 2022Laser beam brazing of aluminum alloys in XHV-adequate atmosphere with surface deoxidation by ns-pulsed laser radiationcitations
- 2022Investigations on microstructure and mechanical properties of laser beam-submerged arc hybrid welded butt joints of duplex stainless steel S31083 (t =16 mm) depending on the energy per unit lengthcitations
- 2022Investigations on laser beam welding of thin foils of copper and aluminum regarding weld seam quality using different laser beam sourcescitations
- 2022Development of an empirical process model for adjusted porosity in laser-based powder bed fusion of Ti-6Al-4Vcitations
- 2022Discoloration of AISI 420 stainless steel in dependence of inter layer time during Laser-based Powder Bed Fusion
- 2022Residual oxygen content and powder recycling: effects on microstructure and mechanical properties of additively manufactured Ti-6Al-4V partscitations
- 2022Investigations on the effect of standing ultrasonic waves on the microstructure and hardness of laser beam welded butt joints of stainless steel and nickel base alloycitations
- 2022Investigation of deposition welding in vertical and horizontal position with a coaxial laser wire welding headcitations
- 2022Laser-based powder bed fusion of Ti-6Al-4V powder modified with SiO2 nanoparticlescitations
- 2022Investigation of the material combination 20MnCr5 and X45CrSi9-3 in the Tailored Forming of shafts with bearing seatscitations
- 2022Influence of an oxygen-free atmosphere on laser beam brazing of aluminium with prior surface deoxidation by pulsed laser radiation
- 2022Advances in powder bed based Additive Manufacturing of metal-glass-hybrid-components
- 2022Investigations on laser beam welding of thick steel plates using a high-power diode laser beam sourcecitations
- 2022High deposition rate welding with a laser line optics with the laser-assisted double-wire deposition welding process with nontransferred arccitations
- 2022Deep Learning-Based Weld Contour and Defect Detection from Micrographs of Laser Beam Welded Semi-Finished Productscitations
- 2022Material dependent surface and subsurface properties of hybrid componentscitations
- 2022Design of additively manufacturable injection molds with conformal cooling
- 2022Empirical Model for the Description of Weld Seam Geometry in Coaxial Laser Hot-Wire Deposition Welding Processes with Different Steel Wirescitations
- 2021Laser-based powder bed fusion of niobium with different build-up ratescitations
- 2021Influence of degree of deformation on welding pore reduction in high-carbon steelscitations
- 2021Development of a laser powder bed fusion process tailored for the additive manufacturing of high-quality components made of the commercial magnesium alloy WE43citations
- 2021Investigations on laser welding of dissimilar joints of stainless steel and copper for hot crack preventioncitations
- 2021Hyperspectral imaging for prediction of surface roughness in laser powder bed fusioncitations
- 2020Influence of ultrasound on pore and crack formation in laser beam welding of nickel-base alloy round bars
- 2020Additive manufacturing of metal-bonded grinding toolscitations
- 2020Numerical simulation and experimental validation of the cladding material distribution of hybrid semi-finished products produced by deposition welding and cross-wedge rollingcitations
- 2020Laser powder bed fusion of WE43 in hydrogen-argon-gas atmosphere
- 2020Investigations on tailored forming of aisi 52100 as rolling bearing racewaycitations
- 2020Defect detection in additive manufacturing via a toolpath overlaid melt-pool-temperature tomographycitations
- 2020Influence of Ultrasound on Pore and Crack Formation in Laser Beam Welding of Nickel-Base Alloy Round Barscitations
- 2019Surface integrity of laser beam welded steel– aluminium alloy hybrid shafts after turning
- 2019Investigation of the prediction accuracy of a finite element analysis model for the coating thickness in cross-wedge rolled coaxial hybrid parts
- 2019Corrosion and corrosion fatigue properties of additively manufactured magnesium alloy WE43 in comparison to titanium alloy Ti-6Al-4V in physiological environment
- 2019Manipulating the melt propagation of short arc gas metal arc welding with diode lasers &lt;1 kW for improvement in flexibility and process robustnesscitations
- 2019Surface Integrity of Laser Beam Welded Steel–Aluminium Alloy Hybrid Shafts after Turningcitations
- 2018Selective Laser Melting for processing of regolith in support of a lunar basecitations
- 2018Novel active driven drop tower facility for microgravity experiments investigating production technologies on the example of substrate-free additive manufacturing
- 2018Manufacturing of high-performance Bi-metal bevel gears by combined deposition welding and forgingcitations
- 2018Advanced high pressure turbine blade repair technologies
- 2018Tribological study on tailored-formed axial bearing washerscitations
- 2017Chip bonding of low-melting eutectic alloys by transmitted laser radiation
- 2015Double pulse laser welding of 6082 aluminium alloyscitations
- 2013Investigation on a new process chain of deposition or friction welding and subsequent hot forgingcitations
Places of action
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article
Defect detection in additive manufacturing via a toolpath overlaid melt-pool-temperature tomography
Abstract
<jats:p>Additive manufacturing of metals has emerged as a potential technology for companies to create highly integrated and individualized products. In particular, powder-based laser metal deposition has advantages such as flexibility and multimaterial capabilities. It is possible to mix powders and create alloys inside the melt-pool during the build process. Consequently, purpose made material combinations with set or even varying thermal properties can be realized. Inherently, the process becomes increasingly challenging because of the great number of variables. Analyzation of the manufactured part ensures top quality and detects errors and defects. To accomplish this, specimens have to be x-rayed or ground and cut into microsections. In order to save time and keep the parts’ integrity, a new method uses temperature data from the process to determine irregularities. During the additive manufacturing process, a 680 W diode laser melts the substrate and the powder locally. The powder is composed of 42% nickel and 58% iron. A pyrometer samples the temperature of the molten pool at a spectral range from 1.45 to 1.85 μm. The recorded data are mapped onto the toolpath of the process head. A script converts the time dependent signal to spatially resolved temperature points. The feedrate and the laser status aid to synchronize the data throughout. As a result, the overlaid melt-pool temperature visualizes the process and creates a tomography for the produced part. Initial experiments show that errors and defects like porosities and cavities are identifiable inside the manufactured structure. Furthermore, correlations between the visualization and errors detected with microsections are possible. Overall, this technique is an addition to the repertoire of data visualization and quality control in additive manufacturing and can be transferred to other machines and laser processes.</jats:p>