Effect of Heat Treatment on Dendritic Microsegregation of an Al-Cu-Si Alloy

Abstract:

Solidification experiment a graphite mold was carried out on ternary alloy Al-4.61Cu-0.92Si and typical dendrite microstructure was obtained. The influence of heat treatment on microsegregation between the dendrite, and the amount and morphology of the non-equilibrium eutectic phases were studied. Line scans results shows that the dendrite microsegregation disappeared after heat treatment under temperature near the ternary eutectic point. And the amount of eutectic phases is decreased obviously and the morphology of most θ-phase is changed from normal pattern to sphere or nearly spherical.

• Periodical: Applied Mechanics and Materials (Volume 442)
• Pages: 32-35
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.442.32
• Online since: October 2013
• Authors: Guang Wei Zhao*, Zeng Min Shi, Xi Cong Ye, Wen Jun Liu
• Keywords: Al-Cu-Si Alloy, Dendritic Solidification, Microsegregation

References

[1] D.M. Xu, H.Z. Fu, J. J. Guo, J. Jia and Q.C. Li: Journal of hit Vol. 35(2003), p.1156.

[2] J.R. Cahoon and H.W. Paxton: Trans. Metall. Soc. AIME Vol. 239(1969), p.1401.

[3] Y.M. Won, T.J. Yeo, D.J. Seol and K.H. Oh: Metall. Mater. Trans. B Vol. 31(2000), p.779.

[4] T. Kraft and Y. A. Chang: JOM Vol. 49(1997), p.20.

[5] T.P. Battle: Int. Materials Reviews Vol. 37(1992), p.249.

[6] X.M. Pan, C. Lin, J.E. Morral and H.D. Brody: JPED vol. 26(2005), p.225.

[7] R. Vijayaraghavan, N. Palle, J. Boilean, J. Zindel, R. Beals and F. Bradley: Scripta Mater. Vol. 35(1996), p.861.

DOI: 10.1016/1359-6462(96)00232-1

[8] G.W. Zhao, X.C. Ye. W.J. Liu and M.C. Gu: AMR. Vol. 503-504(2012), p.374.

[9] I.L. Ferreira, A. Garcia and B. Nestler: Scripta Mater. Vol. 50(2004), p.407.

[10] C.Y. He, Y. Du, H.L. Chen and H.H. Xu: CALPHAD Vol. 33(2009), p.200.

[11] N. Ponweiser and K.W. Richter: J. Alloys Compd. Vol. 512(2012), p.252.

[12] G.W. Zhao, X.Z. Li, D.M. Xu, J.J. Guo, H.Z. Fu and Y. Du: China Foundry. Vol. 3(2012), p.269.