Sage Journals: Discover world-class research

Abstract

The composition, structure, and properties of functionally graded materials (FGMs) vary as a function of position within the material. The extrusion of bulk FGMs, that is FGMs in which the changes occur over distances of many millimetres throughout the crosssection, is described. Graded materials containing up to 30 vol.-%SiC_p in a matrix of aluminium alloy Al 2124 were successfully extruded from preforms produced using a cylindrical stacking method employing concentric, cylindrical aluminium foil tubes. However, the extent of the steady state extrusion region was increased by adopting a conical stacking method. For both stacking methods a pure aluminium surface layer was required to reduce the friction associated with the high silicon carbide contents. PM/0729

Get full access to this article

View all access options for this article.

References

Nino

and MAEDA

: ISIJ Int., 1990, 30, (9), 699.

Hashida

and TAKAHASHI

: Proc. Conf. Progress in Acoustic Emission V, Sendai, Japan, October 1990, Japanese Society for Non-Destructive Testing, 66.

Lin

C.-Y.

, McSHANE

H. B.

, and RAWLINGS

R. D.

: Mater. Sci. Technol., 1994, 10, 659.

Lin

C.-Y.

, McSHANE

H. B.

, and RAWLINGS

R. D.

: Proc. 3rd Int. Symp. on Functionally Gradient Materials, October 1994, Lausanne,’ Switzerland, Federation of European Materials Societies, (ed. Ilschner

and Cherradi

Kawasaki

and WATANABE

: J. Jpn Soc. Powder Powder Met all., 1990, 37, (2), 253.

it. TAKEBE, T. TESHIMA, M. NAKASHIMA, and K. MORINAGA: J. Ceram. Soc. Jpn Int. Ed., 1992, 100, 387.

Lin

C.-Y.

: PhD thesis, Imperial College, University of London, 1994.

Extrusion Process for Manufacture of Bulk Functionally Graded Materials

Abstract

Get full access to this article

References