Characterisation of an Al93Fe3Cr2Ti2 alloy obtained by spray forming

[摘要] Al93Fe3Cr2Ti2 is a highly promising alloy due to its capacity to form quasicrystals. In the present work bulk Al93Fe3Cr2Ti2 obtained by spray forming is microstructurally characterised. A microstructure gradient is observed, in which the external layer consists of an alpha-Al matrix with Al3Ti precipitates and fine quasicrystals while the internal core presents intermetallics of the equilibrium phases Al13Cr2 + Al13Fe4, with intermediate stages between both areas. The hardness ranges from the 140Hv of the external layer to the 90Hv of the core. Spray forming can therefore produce nanoquasicrystalline Al93Fe3Cr2Ti2 which evolves towards equilibrium as the process proceeds, due to the heating produced by the deposition of successive layers. (C) 2010 Elsevier B.V. All rights reserved.

[发布日期] 2010-08-01

[效力级别]  Proceedings Paper

[关键词] Nanostructured;Rapid solidification;Microstructure;Metallography