Title: Laser in situ synthesis of gradient aluminides in metal matrix composite during DMD process

Authors: Igor Shishkovsky; Nina Kakovkina; Floran Missemer

Addresses: Lebedev Physical Institute of Russian Academy of Sciences, Samara Branch, Novo-Sadovaja st. 221, Samara 443011, Russia; Diagnostics and Imaging of Industrial Processes (DIPI) Laboratory, Ecole Nationale d'Ingenieurs de Saint Etienne (ENISE), Université de Lyon, 58 rue Jean Parot, Saint-Étienne Cedex 2, Saint-Étienne 42023, France ' Lebedev Physical Institute of Russian Academy of Sciences, Samara Branch, Novo-Sadovaja st. 221, Samara 443011, Russia ' Diagnostics and Imaging of Industrial Processes (DIPI) Laboratory, Ecole Nationale d'Ingenieurs de Saint Etienne (ENISE), Université de Lyon, 58 rue Jean Parot, Saint-Étienne Cedex 2, Saint-Étienne 42023, France

Abstract: The suitability of direct metal deposition process of exothermic powders (Ni-Al, Ti-Al, Fe-Al systems), traditionally used in the self-propagating high-temperature synthesis technology, is described. Owing to the synthesis of new intermetallic phases, the overlapping of laser in situ synthesis and layerwise deposition processes makes it possible both to obtain more durable parts of complex shape, and to enlarge the functional resource of these functional-graded structures. Besides, relationships between the main laser deposition parameters and the intermetallic phase structures of the built-up objects were studied. In our research we applied optical microscopy, X-ray analysis, microhardness measurement and SEM with EDX analysis of the laser-fabricated intermetallics.

Keywords: DMD; direct metal deposition; FGS; functional graded structures; aluminides; laser deposition parameters; intermetallic phase structures; exothermic powders; laser in situ synthesis; layerwise deposition; microhardness; laser-fabricated intermetallics.

DOI: 10.1504/IJRAPIDM.2015.074813

International Journal of Rapid Manufacturing, 2015 Vol.5 No.3/4, pp.349 - 366

Received: 08 Aug 2015
Accepted: 19 Nov 2015
Published online: 19 Feb 2016 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article