Title: Development of in-situ Al-A1₂Cu functionally graded materials by a centrifugal method

Authors: Shin Oike, Yoshimi Watanabe

Addresses: Department of Functional Machinery and Mechanics, Shinshu University, 3-15-1, Tokida, Ueda 386-8567, Japan. ' Department of Functional Machinery and Mechanics, Shinshu University, 3-15-1, Tokida, Ueda 386-8567, Japan

Abstract: In this study, in-situ Al-A1₂Cu FGMs were fabricated by a centrifugal method using hypo-eutectic, eutectic and hyper-eutectic Al-Cu alloys. The microstructures and mechanical properties of in-situ Al-A1₂Cu FGMs were studied. It was found that the in-situ FGMs could be fabricated by using not only hypo-eutectic or hyper-eutectic alloys but also a eutectic alloy. The particle sizes of the A1₂Cu and Al primary crystals were dependent upon their location in the ring thickness. It was also found that a notable position dependence on the mechanical properties exists. It was concluded that the partial separation of Al and Cu atoms in the liquid state occurred during the early stage of centrifugal processing, prior to the migration of primary crystals.

Keywords: functionally graded materials; FGMs; centrifugal processing; in-situ composites; intermetallic compounds; particle size; Brinell hardness; wear resistance; mechanical properties; aluminium alloys.

DOI: 10.1504/IJMPT.2001.005394

International Journal of Materials and Product Technology, 2001 Vol.16 No.1/2/3, pp.40 - 49

Published online: 01 Oct 2004 *

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