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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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Pauly, Christoph
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Impact of Sample Preparation Approach on Transmission Electron Microscopy Investigation of Sputtered AlNi Multilayers Used for Reactive Solderingcitations
- 2024How to achieve nanometer flat surfaces: Pulsed electrochemical machining of bulk metallic glass
- 2024RuAl Thin‐Film Deposition by DC Magnetron Sputtering
- 2023Effects of Ultrashort Pulsed Direct Laser Writing on Ni/Al Reactive Multilayer Foilscitations
- 2023A Detailed Analysis of the Microstructural Changes in the Vicinity of a Crack-Initiating Defect in Additively Manufactured AISI 316L
- 2023Impact of Microstructure of Nanoscale Magnetron Sputtered Ru/Al Multilayers on Thermally Induced Phase Formationcitations
- 2022Critical Assessment of Two-Dimensional Methods for the Microstructural Characterization of Cemented Carbides
- 2021Phase transformation and characterization of 3D reactive microstructures in nanoscale Al/Ni multilayerscitations
- 2021Phase Transformation and Characterization of 3D Reactive Microstructures in Nanoscale Al/Ni Multilayerscitations
- 2019Effect of Pretreatment on Interface Stability and Morphology of Ni/Al Hybrid Foams by in situ Microcantilever Fracture Experiment
- 2019Eutectic modification by ternary compound cluster formation in Al-Si alloyscitations
- 2019Micromechanical investigations of CVD coated WC-Co cemented carbide by micropillar compression
- 2018Investigations on micro-mechanical properties of polycrystalline Ti(C,N) and Zr(C,N) coatings
- 2017Selbstfortschreitende Reaktionen in Ru/Al/X-Multilagen
- 2016Constrained hierarchical twinning in Ru-based high temperature shape memory alloyscitations
Places of action
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article
Effects of Ultrashort Pulsed Direct Laser Writing on Ni/Al Reactive Multilayer Foils
Abstract
Reactive multilayer foils (RMFs) for joining processes have attracted a great deal of attention over the last few years. They are capable of exothermic self-propagating reactions and can serve as localized heat sources for joining applications when ignited by suitable means. Using short and ultrashort pulsed lasers with carefully selected parameters, cutting and shaping of RMFs makes it possible to tailor heat release characteristics without triggering the reaction. The present study is an investigation of microstructural changes induced by femtosecond laser machining of a commercially available Ni/Al-based RMF. The effects of the specific laser parameters pulse duration and repetition rate on the heat-affected zone (HAZ) are investigated by scanning and transmission electron microscopy. Debris consisting of oxide deposits can be found at a distance of several tens of microns from the cut edge. A negligible HAZ extending to less than 100 nm was observed for all parameters tested and no signs of ignition of a self-propagating reaction were observed. These results underline the suitability of femtosecond lasers for metal machining with minimal heat input.