| People | Locations | Statistics |
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| 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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Piili, Heidi
University of Turku
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (26/26 displayed)
- 2023Impact of additive manufacturing on titanium supply chain: Case of titanium alloys in automotive and aerospace industriescitations
- 2023Impact of additive manufacturing on titanium supply chain: Case of titanium alloys in automotive and aerospace industriescitations
- 2023Electrochemical properties of graphite/nylon electrodes additively manufactured by laser powder bed fusioncitations
- 2021Mechanical properties and microstructure of additively manufactured stainless steel with laser welded jointscitations
- 2021Prospects for laser based powder bed fusion in the manufacturing of metal electrodes: A reviewcitations
- 2020Additive Manufacturing—Past, Present, and the Futurecitations
- 2020Effects of manufacturing parameters and mechanical post-processing on stainless steel 316L processed by laser powder bed fusioncitations
- 2020Characterization of part deformations in laser powder bed fusion of stainless steel 316Lcitations
- 2020Testing and analysis of additively manufactured stainless steel CHS in compressioncitations
- 2020Integration of Simulation Driven DfAM and LCC Analysis for Decision Making in L-PBFcitations
- 2019Effective parameters on the fatigue life of metals processed by powder bed fusion technique: A short reviewcitations
- 2019Study of phenomenon of fibre-laser-MIG/MAG-hybrid-weldingcitations
- 2018Correlation between pyrometer monitoring and active illuminaton imaging of laser assisted additive manufacturing of stainless steelcitations
- 2018Interaction between laser beam and paper materialscitations
- 2018Effect of process parameters to monitoring of laser assisted additive manufacturing of alumina ceramicscitations
- 2018Laser scribing of stainless steel with and without work mediacitations
- 2017Possibilities of CT Scanning as Analysis Method in Laser Additive Manufacturingcitations
- 2017Preliminary Investigation on Life Cycle Inventory of Powder Bed Fusion of Stainless Steelcitations
- 2015Preliminary comparison of properties between Ni-electroplated stainless steel parts fabricated with laser additive manufacturing and conventional machiningcitations
- 2015Overview of Sustainability Studies of CNC Machining and LAM of Stainless Steelcitations
- 2015Possibilities of CT Scanning as Analysis Method in Laser Additive Manufacturingcitations
- 2015Preliminary Investigation of Keyhole Phenomena during Single Layer Fabrication in Laser Additive Manufacturing of Stainless Steelcitations
- 2014Katsaus lisäävän valmistuksen (aka 3D-tulostus) mahdollisuuksiin ja kustannuksiin metallisten tuotteiden valmistuksessa: Case jauhepetitekniikka ; Overview to possibilities and costs of additive manufacturing (aka 3D printing) of metallic materials: Case powder bed fusion technique
- 2014Monitoring of temperature profiles and surface morphologies during laser sintering of alumina ceramicscitations
- 2013Digital design and manufacturing process comparison for new custom made product family – a case study of a bathroom faucetcitations
- 2010The characteristics of high power fibre laser weldingcitations
Places of action
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article
Preliminary Investigation of Keyhole Phenomena during Single Layer Fabrication in Laser Additive Manufacturing of Stainless Steel
Abstract
aser additive manufacturing (LAM) is a fabrication technology that enables production of complex parts from metallic materials with mechanical properties comparable to conventionally manufactured parts. In the LAM process, parts are manufactured by melting metallic powder layer-by-layer with a laser beam. This manufacturing technology is nowadays called powder bed fusion (PBF) according to the ASTM F2792-12a standard. This strategy involves several different independent and dependent thermal cycles, all of which have an influence on the final properties of the manufactured part. The quality of PBF parts depends strongly on the characteristics of each single laser-melted track and each single layer. This study consequently concentrates on investigating the effects of process parameters such as laser power on single track and layer formation and laser-material interaction phenomena occurring during the PBF process. Experimental tests were done with two different machines: a modified research machine based on an EOS EOSINT M-series system and an EOS EOSINT M280 system. The material used was EOS stainless steel 17-4 PH. Process monitoring was done with an active illuminated high speed camera system. After microscopy analysis, it was concluded that a keyhole can form during laser additive manufacturing of stainless steel. It was noted that heat input has an important effect on the likelihood of keyhole formation. The threshold intensity value for keyhole formation of 106 W/cm2 was exceeded in all manufactured single tracks. Laser interaction time was found to have an effect on penetration depth and keyhole formation, since the penetration depth increased with increased laser interaction time. It was also concluded that active illuminated high speed camera systems are suitable for monitoring of the manufacturing process and facilitate process control.