Showing papers on "Functionally graded material published in 1994"
TL;DR: In this article, a thick-walled tube of an in-situ Al-Al3Ni functionally graded material (FGM) was made by the centrifugal method with an ingot of commercial purity Al-20 mass%Ni master alloy.
Abstract: A thick-walled tube of an in-situ Al-Al3Ni functionally graded material (FGM) was made by the centrifugal method with an ingot of commercial purity Al-20 mass%Ni master alloy. The applied centrifugal forces, expressed by G numbers, are 23 and 147 times of the gravitational acceleration. The microstructure of the FGM tube consists of granular morphology Al3Ni as a second phase distributed within the aluminum matrix with an increasing volume fraction gradient from the inside to the outside of the tube. The shape of the Al3Ni particles varies from the spindle or needle to almost the rectangular or square while their sizes are dependent upon both their location in the tube thickness and the applied G number. The mean particle size is around 60μm. The Young's modulus and the linear expansion coefficient of the Al-Al3Ni FGM are found to vary from 72.9 to 117.2GPa and from 23.4×10-6 to 19.4×10-6/K, respectively, across the tube-wall thickness from the inner to outer surface reflecting the volume fraction change of the Al3Ni phase from 3 to 58 vol%.
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