Intermetallic Al2Cu orientation and deviation angle measured by the rotating directional test during directional solidification

K. Gao*, S.M. Li, H.Z. Fu

State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’ an 710072, P. R. China

Adv. Mater. Lett., 2011, 2 (5), pp 368-372

DOI: 10.5185/amlett.2011.5013am2011

Publication Date (Web): Apr 08, 2012

E-mail: gaoka9222005@163.com, lsm@nwpu.edu.cn, fhzh@pub.xaonline.com

Abstract


The orientation and deviation angle of intermetallic Al2Cu phase in directionally solidified Al-40wt. %Cu hypereutectic alloy were investigated using a rotating orientation X-ray diffraction (RO-XRD) method. Experimental results show that preferred planes (110) and (310) of the Al2Cu phase occur at 10 μm/s and the growth directions of the two planes are not well aligned with the heat flux direction. The growth direction of the preferred plane (110) has a 7.24 º~11.43 º angle with the heat flux direction. For the direction of the plane (310), its deviation angle attains 2.68 º ~ 20.82 º. Besides, the measured data agree well with the previously reported results, indicating that the RO-XRD method is an effective method for measuring the orientation and deviation angle of the phase in polycrystalline materials.

Keywords

Directional solidification, intermetallic compound, RO-XRD, orientation and deviation angle.

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