Direct Fabrication of a Ti-47Al-2Cr-2Nb Alloy by Selective Laser Melting and Direct Metal Deposition Processes

Thomas Vilaro; V. Kottman-Rexerodt; Marc Thomas; Christophe Colin; P. Bertrand; L. Thivillon; S. Abed; V. Ji; P. Aubry; Patrice Peyre; T. Malot

doi:10.4028/www.scientific.net/AMR.89-91.586

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 89-91Direct Fabrication of a Ti-47Al-2Cr-2Nb Alloy by...

Direct Fabrication of a Ti-47Al-2Cr-2Nb Alloy 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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Periodical:

Advanced Materials Research (Volumes 89-91)

Pages:

586-591

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.89-91.586

Citation:

Cite this paper

Online since:

January 2010

Authors:

Thomas Vilaro, V. Kottman-Rexerodt, Marc Thomas, Christophe Colin, P. Bertrand, L. Thivillon, S. Abed, V. Ji, P. Aubry, Patrice Peyre, T. Malot

Keywords:

Direct Metal Deposition (DMD), Heat Treatment, Rapid Solidification Microstructure, Selective Laser Melting (SLM)

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