| 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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Huang, Xiaoxu
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2023Aging 17-4 PH martensitic stainless steel prior to hardening:effects on martensitic transformation, microstructure and propertiescitations
- 2023Aging 17-4 PH martensitic stainless steel prior to hardeningcitations
- 2019Deformation microstructures and strength of face-centered cubic high/medium entropy alloyscitations
- 2017Non-spherical voids and lattice reorientation patterning in a shock-loaded Al single crystalcitations
- 2017A gradient surface produced by combined electroplating and incremental frictional sliding
- 2014Microstructural evolution and strength of copper during cold rolling to large strain
- 2012Strain distribution during tensile deformation of nanostructured aluminum samplescitations
- 2012Effect of hardness of martensite and ferrite on void formation in dual phase steelcitations
- 2012Length scale effects on deformation microstructure formation in the near-micrometre grain size regime
- 2012Ultrafine Structure and High Strength in Cold-Rolled Martensitecitations
- 2012Stored energy and annealing behavior of heavily deformed aluminiumcitations
- 2011Three-Dimensional Orientation Mapping in the Transmission Electron Microscopecitations
- 2010Strain rate dependence of the flow stress in nanostructured aluminium sheets produced by accumulative roll bonding
- 2010Strengthening mechanisms and optimization of structure and properties in a nanostructured IF steelcitations
- 2008Tailoring structures through two-step annealing process in nanostructured aluminum produced by accumulative roll-bondingcitations
- 2008Property optimization of nanostructured ARB-processed Al by post-process deformationcitations
- 2007Investigation of the deformation structure in an aluminium magnesium alloy by high angular resolution three-dimensional X-ray diffractioncitations
Places of action
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article
Aging 17-4 PH martensitic stainless steel prior to hardening
Abstract
<p>Precipitation hardening martensitic stainless steel 17-4 PH is conventionally austenitized and air cooled to room temperature to form martensite. On aging the martensitic condition tiny Cu-rich precipitates are formed that provide high strength. In the present investigation, the steel was aged in austenitic condition prior to martensite formation. Dilatometry, transmission electron microscopy, atomic probe tomography, synchrotron X-Ray diffraction, electron backscatter diffraction, hardness tests and tensile tests were applied to study austenite aging and its effects on: (i) the subsequent transformation of austenite into martensite, (ii) the microstructure of the forming martensite and (iii) the mechanical properties of the material. Austenite aging favors early formation of Cu clusters followed by precipitation of Cu particles. The evolution of the Cu precipitate size with aging time follows traditional Ostwald ripening kinetics which is rate controlled by Cu diffusion in austenite. Austenite aging affects the kinetics of martensite formation and the substructure of the martensite laths; overall, it provides significant strengthening to the martensitic material. The contribution of precipitates to the strength of martensite is interpreted in terms of the Russell-Brown model for modulus strengthening. The data and the model are reconciled by re-evaluating the adjustable parameter used in the original work. Finally, the work reports the influence of austenite aging on the mechanical properties of the material when this is further aged to peak strength in martensitic condition.</p>