発泡金属複合アルミニウム合金の強度特性に及ぼす化合物層の影響

抄録

This paper deals with the strength of nickel-foam reinforced aluminum Alloy (NFRA) and clarifies the influence of the thickness of intermetallic compound layer of NFRA. NFRA has two kinds of intermetallic compound layer between nickel-foam and base metal formed by artificial aging. In order to vary the thickness of intermetallic compound layer, three different heat treatment conditions were performed on three types of NFRA with different size of Ni skeletons and on AC8A aluminum alloy. Fatigue tests and tensile tests were carried out on NFRA and AC8A aluminum alloy. The fatigue life and tensile strength of NFRA decreased significantly as compared with those of AC8A. The thickness of intermetallic compound layer affects both the fatigue strength and tensile strength, since the intermetallic compound layer changes the bonding strength of the interface between nickel-foam and base metal.