Beneficial influence of copper and manganese alloying elements on the mechanical properties of metallic composite materials based on the eutectic Al-5.7% Ni alloy
- 39 Downloads
We have developed a new type of metallic composite material based on the binary eutectic Al-5.7 wt% Ni alloy. The structure of the initial alloys prepared by simple casting consists of strong, fine fibres of the Al3Ni phase and a ductile aluminium matrix. These alloys are then transformed into dispersion-hardened materials by isostatic extrusion in which the Al3Ni fibres are broken and dispersed in the ductile matrix. The materials thus prepared present a mechanical strength of the same order as the unidirectionally solidifed eutectic alloy: the tensile strength is nearly 300 MPa at room temperature. We observed in this work that the mechanical strength is remarkably increased by the addition of a small amount of copper or manganese: it attains about 400 MPa by the addition of 2 to 3wt% Cu, and more than 500 MPa by the addition of 3wt% Mn. These alloying elements also produce beneficial effects on the mechanical properties at high temperature.
KeywordsPolymer Copper Mechanical Property Manganese Tensile Strength
Unable to display preview. Download preview PDF.
- 1.A. Berghezan, J. Dille, R. Deschamps, G. Vielvoye andN. Terao,C. R. Acad. Sci. Paris 293II (1981) 417.Google Scholar
- 2.N. Terao, Z. Wen, J. Dille andA. Berghezan,ibid. 295II (1982) 459.Google Scholar
- 3.N. Terao, J. Dille, G. Vielvoye andA. Berghezan, Proceedings of the 4th International Conference on Composite Materials, Tokyo, 1982 (Japan Society for Composite Materials) p. 1585.Google Scholar
- 4.F. D. Lemkey, R. W. Hertzberg andJ. A. Ford,Trans. Met. Soc. AIME 233 (1965) 334.Google Scholar
- 5.R. W. Hertzberg, F. D. Lemkey andJ. A. Ford,ibid. 233 (1965) 342.Google Scholar