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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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Roy, Matthew
University of Manchester
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2024Pachydermoperiostosis: Cosmetic implications in a multi-system genetic condition
- 2023Evolution and formation of dissimilar metal interface s in fusion weldingcitations
- 2023Wire-arc directed energy deposition of Inconel 718: Effects of heat input and build interruptions on mechanical performancecitations
- 2022Effects of microstructural heterogeneity and structural defects on the mechanical behaviour of wire + arc additively manufactured Inconel 718 componentscitations
- 2022A fundamental analysis of factors affecting chemical homogeneity in the laser powder bed fusion process
- 2021Internal stresses in a clad pressure vessel steel during post weld heat treatment and their relevance to underclad crackingcitations
- 2021Internal stresses in a clad pressure vessel steel during post weld heat treatment and their relevance to underclad crackingcitations
- 2021Dry sliding wear behaviour of additive manufactured CrC-rich WC-Co cemented carbides
- 2020Process response of Inconel 718 to wire + arc additive manufacturing with cold metal transfercitations
- 2020Comparison of sub-grain scale digital image correlation calculated using commercial and open-source software packagescitations
- 2020pyCM: An open-source computational framework for residual stress analysis employing the Contour Methodcitations
- 2020Evaluation of wear mechanisms in additive manufactured carbide-rich tool steels
- 2019Residual stresses in arc and electron-beam welds in 130 mm thick SA508 steelcitations
- 2019High temperature low cycle fatigue characterization of equiaxed MAR-M-247citations
- 2019Residual stresses in arc and electron-beam welds in 130 mm thick SA508 steel:Part 1 - Manufacturecitations
- 2018Improved low cycle fatigue analysis for Nickle based turbine nozzles
- 2018AN INVESTIGATION INTO THE INTERFACE BEHAVIOUR OF AN ALUMINIUM/SILICON CARBIDE FIBRE METAL MATRIX COMPOSITE
- 2018Residual Stress Distributions in Arc, Laser and Electron-Beam Welds in 30 mm Thick SA508 Steelcitations
- 2018Residual Stress Distributions in Arc, Laser and Electron-Beam Welds in 30 mm Thick SA508 Steel:A Cross-Process Comparisoncitations
- 2017Residual Stress Characterization and Control in the Additive Manufacture of Large Scale Metal Structurescitations
- 2017An Evaluation of Multipass Narrow Gap Laser Welding as a Candidate Process for the Manufacture of Nuclear Pressure Vesselscitations
- 2017Comparison of residual stress distributions in conventional and stationary shoulder high-strength aluminum alloy friction stir weldscitations
- 2017Thermal cycle-dependent metallurgical variations and their effects on the through-thickness mechanical properties in thick section narrow-gap weldscitations
- 2017A Novel Arc Heat Treatment Technique for Producing Graded Microstructures Through Controlled Temperature Gradientscitations
- 2017Measurement of residual stresses induced by sequential weld buttering and cladding operations involving a 2.25Cr-1Mo substrate materialcitations
- 2016The effect of the weld fusion zone shape on residual stress in submerged arc weldingcitations
- 2015Influence of casting defect and SDAS on the multiaxial fatigue behaviour of A356-T6 alloy including mean stress effectcitations
- 2015Influence of casting defect and SDAS on the multiaxial fatigue behaviour of A356-T6 alloy including mean stress effectcitations
- 2015Analysis and modelling of a rotary forming process for cast aluminum alloy A356citations
Places of action
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article
Effects of microstructural heterogeneity and structural defects on the mechanical behaviour of wire + arc additively manufactured Inconel 718 components
Abstract
This study investigates the extent to which the build orientation and heat treatment schedule affect the microstructure and mechanical properties for thin-walled and additively manufactured IN718 components produced with the cold metal transfer process (CMT-WAAM). Uniaxial tensile tests using digital image correlation (DIC), microhardness analysis and fractography were used to characterise the mechanical behaviour, both in the as-deposited condition and after heat treatments used in the aerospace and oil and gas industries. Wrought material was also tested to benchmark the measured properties. The solution treatment of 1040 °C for 1 h in the oilfield specification reduced the area fraction of Laves phases significantly (∼80%) and promoted higher homogenisation of ageing constituents. However, grain growth near interlayer boundaries resulted in localised low hardness (∼50 HV0.2 below the average) after age hardening. In the as-deposited condition, the yield strength was ∼10% lower along the build direction and changed to being 8–13% higher along the same direction in heat-treated samples, while the elastic modulus relative to deposition orientation was unaffected. Furthermore, solidification defects, such as porosity and hot cracking, caused strain localisation during tensile testing and substantial scatter in macroscopic strain. The ductility was improved with oil and gas heat treatment, but it was substantially lower along the build direction due to the longer axis of defects being perpendicular to loading direction. This study highlights the importance of optimising process parameters to minimise defects and tailoring heat treatments to achieve a higher ductility in IN718 processed by WAAM.