Particle Distribution and Orientation in Al-Al₃Zr and Al-Al₃Ti FGMs Produced by the Centrifugal Method

Abstract:

Al-Al3Zr and Al-Al3Ti functionally graded materials (FGMs) were produced by a centrifugal method from Al-5wt% Zr and Al-5wt% Ti alloys, respectively. Applied centrifugal forces were 30, 60 and 120G (units of gravity). Microstructural characterization was performed to evaluate the intermetallic particles’ distribution and orientation. Knoop hardness tests were carried out, with the indenter’s long diameter normal to the centrifugal force direction. Both the Al3Zr and the Al3Ti intermetallic particles are platelet in morphology. These platelets tend to be oriented normal to the centrifugal force direction. Higher applied centrifugal force increases both the intermetallic platelet volume fraction as well as their orientation in the outer regions of the fabricated FGM rings. Also higher orientation and volume fraction distribution are observed in the Al- Al3Ti FGMs. Knoop hardness measurements in general follow the same trend as the intermetallic particle volume fraction for each sample.

• Periodical: Materials Science Forum (Volumes 492-493)
• Pages: 609-614
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.492-493.609
• Online since: August 2005
• Authors: P.D. Sequeira, Yoshimi Watanabe, L.A. Rocha
• Keywords: Centrifugal Method, Functionally Graded Material (FGM), Orientation

References

[1] M. Yamaguchi and Y. Umakoski: Intermetallic Compounds (Nikkan Kogyou, Shinbunsya, Tokyo 1984).

[2] S.H. Wang and P.W. Kao: Acta Mater. Vol. 46 (1998), p.2675.

[3] S.H. Wang, P.W. Kao and C.P. Chang: Scripta Mater. Vol. 40 (1999), p.289.

[4] Z. Sun, H. Hashimoto, Q. Wang, Y. Park and T. Abe: Mater. Trans. Vol 41 (2000), p.597.

[5] Y. Fukui: JSME Inst. J. Series III Vol. 34 (1991), p.144.

[6] Y. Fukui and Y. Watanabe: Metal. Mater. Trans. A Vol. 27A (1996), p.4145.

[7] Y. Watanabe, N. Yamanaka and Y. Fukui: Composites Part A Vol. 29A (1998), p.595.

[8] Y. Watanabe and Y. Fukui: Aluminum Trans. Vol. 2 (2000), p.195.

[9] Y. Watanabe, N. Yamanaka and Y. Fukui: Metal. Mater. Trans. A Vol. 30A (1999), p.3253.

[10] Y. Watanabe, H. Eryu and Y. Fukui: Ceramic Trans. Vol. 114 (2001), p.675.

[11] H. Asanuma, M. Hirohashi, K. Miyoshi, Y. Sakamoto and K. Hayashi: Proc. 3rd Int. SAMPE Met. Conf. (1992), M581-M587.

[12] R.B. Pipes, R.L. McCullough and D.G. Taggart: Polymer Compo. Vol. 3 (1982), p.34.

[13] R.C. Wetherhold and P.D. Scott: Compo. Sci. Tech. Vol. 62 (2002), p.393.

[14] L. Lajoye and M. Suery: Proc. Int. Symp. on Advances in Cast Reinforced Metal Composites, ASM International (1988), p.15.

[15] Y. Watanabe, N. Yamanaka and Y. Fukui: Z. Metallkd. Vol. 88 (1997), p.717.

[16] Y. Watanabe, H. Eryu and Y. Fukui: Acta Mater. Vol. 49 (2001), p.775.

[17] S. Suresh and A. Mortensen: Fundamentals of Functionally Graded Materials: Processing and Thermomechanical Behaviour of Graded Metals and Metal-Ceramic Composites (IOM Communications Ltd. 1998).

DOI: 10.1179/imr.1997.42.3.85

[18] S.H. McGee and R.L. McCullough: J. Appl. Phys. Vol. 55 (1984), p.1394.

[19] L.M. Gonzalez, F.L. Cumbrera, F. Sanchez-Bajo and A. Pajares: Acta Metall. Mater. Vol. 42 (1994), p.689.