Laser in situ synthesis of gradient aluminides in metal matrix composite during DMD process. (2015)

• Record Type: Journal Article
• Authors: Shishkovsky, Igor; Kakovkina, Nina; Missemer, Floran
• Is Part Of: International journal of rapid manufacturing. Volume 5:Number 3/4(2015)
• Page Start: 349
• Page End: 366
• Publication Date: 2015
• Subjects: 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; Manufacturing processes -- Periodicals; 670.4205
• Languages: English
• ISSNs: 1757-8817

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.