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Communication dans un congrès

Direct fabrication of a Ti-47Al-2Cr-2Nb ally by selective laser melting and direct metal deposition processes

Abstract : A Ti-47Al-2Cr-2Nb (at.%) material was fabricated using two laser-based methods, “Selective Laser Melting” (SLM) and “Direct Metal Deposition” (DMD), for potential uses in aircraft jet engines. Experiments were conducted under controlled atmosphere by changing the processing parameters. Optimal parameters were searched for this relatively low ductility material to prevent cracking due to built-up residual stresses during fast cooling. It was observed that these non-equilibrium cooling conditions were fast enough to generate ultra fine and metastable structures exhibiting high microhardness values. Post heat-treatments were successfully used to restore homogeneous lamellar or duplex microstructures and to relieve the residual stresses. A comparison of these two methods is provided in terms of powder requirements and of process parameters to achieve noncracked structures and fully dense materials.
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Communication dans un congrès
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https://hal-mines-paristech.archives-ouvertes.fr/hal-00448707
Contributeur : Bibliothèque Umr7633 <>
Soumis le : mardi 19 janvier 2010 - 18:05:03
Dernière modification le : mercredi 14 octobre 2020 - 03:48:31

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Thomas Vilaro, V. Kottmann-Rexerodt, M. Thomas, Christophe Colin, P. Bertrand, et al.. Direct fabrication of a Ti-47Al-2Cr-2Nb ally by selective laser melting and direct metal deposition processes. Thermec 2009, Aug 2009, Berlin, Germany. pp.586-591, ⟨10.4028/www.scientific.net/AMR.89-91.586⟩. ⟨hal-00448707⟩

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