The Microstructure of Rapidly Solidified Al-Zn-Mg-Cu Alloys with Zr Addition

Abstract:

Article Preview

The effect of rapid solidification on the microstructure of Al-Zn-Mg-Cu alloys with 8 wt.% Zn-2 wt.% Mg-2.3 wt.% Cu and 0.2 or 0.5 wt.% of Zr additions were investigated using X-ray diffraction measurements (XRD), scanning (SEM) and transmission electron microscopy (TEM) combined with energy dispersive X-ray (EDX) microanalysis. Rapidly solidified ribbons with thickness of 70-100 m were performed by melt spinning technique. The mould cast alloys as well as the melt spun ribbons revealed dendritic microstructure of (Al) solid solution and η Mg(Zn,Cu)2 phase in interdendritic areas. The refinement of the microstructure and reduction of the volume fraction of the η phase up to 1.7%, as compared to 4% in the mould cast alloys was observed in the ribbons. Copper dissolution up to about 20 wt % in the η phase causes a decrease of the lattice parameters. The Al3Zr primary precipitates were observed in the mould cast alloy containing 0.5 wt % of Zr while in the ribbons all zirconium dissolved in the aluminium solid solution.

Info:

Periodical:

Solid State Phenomena (Volume 163)

Edited by:

Danuta Stróż & Małgorzata Karolus

Pages:

42-45

DOI:

10.4028/www.scientific.net/SSP.163.42

Citation:

L. Lityńska-Dobrzyńska et al., "The Microstructure of Rapidly Solidified Al-Zn-Mg-Cu Alloys with Zr Addition", Solid State Phenomena, Vol. 163, pp. 42-45, 2010

Online since:

June 2010

Export:

Price:

$38.00

[1] L.F. Mondolfo: Aluminium Alloys: Structure and Properties, London, Butterworths (1976).

[2] I.J. Palmear: Light Alloys: from traditional alloys to nanocrystals, Elsevier, (2006).

[3] T.S. Srivatsan, S. Sriram, D. Veeraraghavan, V.K. Vasudevan: J. Mater. Sci. Vol. 32 (1997), p.2883.

[4] I.N. Fridlyander: Metal Science and Heat Treatment Vol. 45 (2003), p.341.

[5] Y.L. Wu, F.H. Froes, A. Alvarez, C.G. Li, J. Liu: Materials & Design, Vol. 18 (1997), p.211.

[6] J.D. Robson, P.B. Prangnell: Acta mater. Vol. 49 (2001), p.599.

[7] S. Yang, Y. Xie, S. Dai, M. Yan: Mater. Scie. Forum Vols. 546-549 (2007), p.1069.

[8] E.J. Lavernia, J.D. Ayers, T.S. Srivatsan: Intern. Mater. Reviews, Vol. 37, (1992), p.1.

[9] H. Jones: Philosophical Mag. B, Vol. 61, (1990), p.487.

[10] C. Mondal, A.K. Mukhopadhyay: Mater. Sci Eng. A Vol. 391 (2005), p.367.

In order to see related information, you need to Login.