遠心鋳造法により製作したFGM材の平板化に関する研究

概要

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An in-situ Al-Al_3Ni FGM of a thick-walled tube was manufactured using the centrifugal method from a commercial purity Al-20 mass% Ni master alloy ingot. The microstructure of the Al-Al_3Ni FGM tube consists of granular Al_3Ni particles distributed as intermetallics in the Al matrix. In our previous study, the extrusion process of the FGM was shown to be promising. Manufacturing flat sheet FGMs would be quite attractive for a wide range of usage of intermetallic-metal matrix FGMs. In this paper, a possible way to make a ring shaped FGM into a flat plate using the rolling process is presented. The mechanisms and principles of the present method are also discussed. It shows that 1) the relationships of the projected lengths contacted with the upper and lower rollers and plastic coefficients affect the flattening of the FGM, 2) good results are obtained by giving the bending moment to the material.
都城工業高等専門学校の論文