Grain Boundary Plane Distributions in a Hot Rolled 5A06 Aluminum Alloy

Authors


  • GSR acknowledges support from Office of Naval Research Grant N00014-11-1-0678. Facilities support from the Carnegie Mellon MRSEC, under National Science Foundation under Award Number DMR-0520425, are also acknowledged. Kunyuan Gao acknowledges support in part from the International Science & Technology Cooperation Program of China 2013DFB50170, the National High Technology Research and Development Program of China 2013AA031301, and the National Natural Science Foundation of China 51101001. Xiaokun Yuan acknowledges support from the Beijing Natural Science Foundation 2123061 and the State Key Lab of Advanced Metals and Materials 2013-Z01. Xiaokun Yuan is truly grateful to several anonymous experts for valuable comments and suggestions, and also appreciates Dr. Yuntao Lei for providing kind help to this work, and thanks Dr. Hongmei Xu for giving linguistic advice.

Abstract

To investigate the preferential distribution of grain boundary planes in a hot rolled aluminum alloy, the electron backscattered diffraction approach and five-parameter analysis method are used to characterize the grain boundary plane distributions in a hot rolled 5A06 aluminum alloy, and the results show that the orientations of grain boundary planes are textured. Grain boundary planes favor the {111} orientation at the center of the specimen, and their population is 56% higher than that in a random distribution, whereas grain boundary planes favor the {110} orientation on the surface of the specimen, and their population is 69% higher than that in a random distribution. Moreover, this anisotropic distribution of grain boundary planes occurs at all misorientation angles. The study suggests a new understanding of the pathway to evaluate the crystallographic orientation dependent performances.

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