| 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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Pardal, Goncalo
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2023High temperature performance of wire-arc additive manufactured Inconel 718citations
- 2022Microstructure and mechanical properties of Inconel 718 and Inconel 625 produced through the wire + arc additive manufacturing process
- 2021Selection of parameters in nanosecond pulsed wave laser micro-weldingcitations
- 2021Comparison of continuous and pulsed wave lasers in keyhole welding of stainless‑steel to aluminiumcitations
- 2019Fabrication of functionalised surfaces on gum metal (Ti-30Nb) using micromachining
- 2017Laser spot welding of laser textured steel to aluminiumcitations
- 2016Wire + Arc Additive Manufacturingcitations
- 2016Investigation of dissimilar metal welds by energy-resolved neutron imagingcitations
- 2016Investigation of dissimilar metal welds by energy-resolved neutron imagingcitations
- 2016Dissimilar metal joining of stainless steel and titanium using copper as transition metalcitations
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article
Investigation of dissimilar metal welds by energy-resolved neutron imaging
Abstract
<jats:p>A nondestructive study of the internal structure and compositional gradient of dissimilar metal-alloy welds through energy-resolved neutron imaging is described in this paper. The ability of neutrons to penetrate thick metal objects (up to several cm) provides a unique possibility to examine samples which are opaque to other conventional techniques. The presence of Bragg edges in the measured neutron transmission spectra can be used to characterize the internal residual strain within the samples and some microstructural features,<jats:italic>e.g.</jats:italic>texture within the grains, while neutron resonance absorption provides the possibility to map the degree of uniformity in mixing of the participating alloys and intermetallic formation within the welds. In addition, voids and other defects can be revealed by the variation of neutron attenuation across the samples. This paper demonstrates the potential of neutron energy-resolved imaging to measure all these characteristics simultaneously in a single experiment with sub-mm spatial resolution. Two dissimilar alloy welds are used in this study: Al autogenously laser welded to steel, and Ti gas metal arc welded (GMAW) to stainless steel using Cu as a filler alloy. The cold metal transfer variant of the GMAW process was used in joining the Ti to the stainless steel in order to minimize the heat input. The distributions of the lattice parameter and texture variation in these welds as well as the presence of voids and defects in the melt region are mapped across the welds. The depth of the thermal front in the Al–steel weld is clearly resolved and could be used to optimize the welding process. A highly textured structure is revealed in the Ti to stainless steel joint where copper was used as a filler wire. The limited diffusion of Ti into the weld region is also verified by the resonance absorption.</jats:p>