The heterogeneity of the aluminum structure and mechanical properties under equal-channel angular pressing |
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| Authors: | K. V. Ivanov and E. V. Naidenkin |
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| Affiliation: | (1) Department of Materials Science and Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan;(2) Department of Technology, Fukuoka University of Education, Munakata, Fukuoka 811–4192, Japan;(3) Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-1453, USA; |
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| Abstract: | An analysis of the diffraction patterns from backscattered electrons and of measured microhardness has been performed to investigate the distributions of structural parameters (average grain/subgrain size and fraction of high-angle grain boundaries) and of the mechanical properties in the longitudinal section of a pure aluminum billet subjected to severe plastic deformation by equal-channel angular pressing. The distributions of the characteristics under study were found to be nonuniform. A minimum average grain size and a maximum fraction of high-angle boundaries were observed in the core of the billet. As the sample surface was approached, the examined parameters were seen to vary in magnitude through a broad range. Conceivable reasons for the structural heterogeneity of the material are discussed. |
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