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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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Jhabvala, Jamasp
École Polytechnique Fédérale de Lausanne
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2024Acoustic emission signature of martensitic transformation in laser powder bed fusion of Ti6Al4V-Fe, supported by operando X-ray diffractioncitations
- 2021Influence of Hf on the heat treatment response of additively manufactured Ni-base superalloy CM247LCcitations
- 2021Influence of Hf on the heat treatment response of additively manufactured Ni-base superalloy CM247LCcitations
- 2021Tensile and impact toughness properties of a Zr-based bulk metallic glass fabricated via laser powder-bed fusioncitations
- 2021Characterization, mechanical properties and dimensional accuracy of a Zr-based bulk metallic glass manufactured via laser powder-bed fusioncitations
- 2021Characterization, mechanical properties and dimensional accuracy of a Zr-based bulk metallic glass manufactured via laser powder-bed fusioncitations
- 2021Additive manufacturing of a precious bulk metallic glasscitations
- 2021Fatigue performance of an additively manufactured zr-based bulk metallic glass and the effect of post-processingcitations
- 2021Mapping Spatial Distribution of Pores in an Additively Manufactured Gold Alloy Using Neutron Microtomographycitations
- 2020Combining alloy and process modification for micro-crack mitigation in an additively manufactured Ni-base superalloycitations
- 2019Healing cracks in selective laser melting by 3D laser shock peeningcitations
- 20173D laser shock peening – a new method for the 3D control of residual stresses in selective laser meltingcitations
- 20173D Laser Shock Peening – A new method for the 3D control of residual stresses in Selective Laser Meltingcitations
- 2009Study of the consolidation process under macro- and microscopic thermal effects in selective laser sintering and selective laser melting
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article
Influence of Hf on the heat treatment response of additively manufactured Ni-base superalloy CM247LC
Abstract
he influence of Hf on the heat treatment response of a Laser Powder Bed Fusion (L-PBF) fabricated Ni-base superalloy was investigated. A Hf-free version of CM247LC, CM247LC NHf, and CM247LC (~1.4 wt% Hf) were subjected to identical thermal treatments and characterized. After solutionizing at 1260 °C for 2 h, both alloys displayed recrystallization and grain growth. The CM247LC NHf had numerous annealing twins suggesting that Hf inhibits twin formation. The CM247LC NHf alloy displayed a lower peak hardness than CM247LC (5000 MPa and 5200 MPa, respectively) and this was attributed to a ~6% point reduction (Calphad calculated) in γ′ phase fraction due to the removal of Hf. Despite the lower hardness values, the CM247LC NHf displayed a higher yield strength than CM247LC at 760 °C (969 MPa and 926 MPa, respectively). Elongation at fracture at 760 °C was similar (~1%) for both CM247LC and CM247LC NHf. The removal of Hf was shown to be effective at mitigating the strain age cracking susceptibility of CM247LC, likely due to the decrease in γ’ phase fraction and lattice mismatch.