Characterisations of TiC particle reinforced FeAl composite part fabricated by selective laser melting

Abstract

TiC reinforced FeAl intermetallic matrix composite parts were successfully fabricated by selective laser melting using mechanically blended powders. Top surface and cross-sectional microstructure of FeAl/TiC and pure FeAl parts were observed by scanning electron microscopy and optical microscopy. The microhardness and modulus of elasticity were compared. The wear resistance of the melted parts was investigated, and the wear mechanisms were discussed based on worn surfaces and wear debris examinations. Results showed that TiC reinforced FeAl intermetallic matrix composite bulk parts present a relatively smooth and dense melted microstructure, and there are two phases in the composite part. Unmelted TiC reinforcements uniformly dispersed in the matrix. Compared with the pure FeAl parts, FeAl/TiC composite parts have a higher microhardness, an enhanced modulus of elasticity and a much better wear resistance, displaying much lower wear rate.

Keywords:

• Selective laser melting
• FeAl matrix
• TiC reinforcement
• Microstructure
• Wear