Functionally graded Al–Al3Ni in situ intermetallic composites: Fabrication and microstructural characterization

Functionally graded materials (FGM) are a relatively new class of inhomogeneous composite materials, where the composition or the microstructure is locally varied to alter the material properties within a component. The present investigation is on fabrication of functionally graded Al–Al3Ni in situ...

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Bibliographic Details
Published in:Journal of alloys and compounds 2008-04, Vol.453 (1-2), p.L4-L7
Main Authors: Rajan, T.P.D., Pillai, R.M., Pai, B.C.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Hardness
Intermetallics
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metal matrix composites
Metals. Metallurgy
Microstructure
Powder metallurgy. Composite materials
Production techniques
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Summary:Functionally graded materials (FGM) are a relatively new class of inhomogeneous composite materials, where the composition or the microstructure is locally varied to alter the material properties within a component. The present investigation is on fabrication of functionally graded Al–Al3Ni in situ intermetallic composites and their characterization. Al–Ni alloys with varying percentage of nickel (10–40%) have been used to fabricate Al–Al3Ni FGM by vertical centrifugal casting. The microstructural characteristics and hardness profile of these FGMs have been evaluated. Amongst the four alloy systems studied, Al–20wt%Ni gives the best graded microstructure.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2006.11.181