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

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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