ANALYSIS ON EARING BEHAVIOR OF TEXTURED PURE ALUMINUM AND A5083 ALLOYSHEETS

Based on the continuum mechanics of textured polycrystals (CMTP), the effects of texture components and their scatter width on the earing be havior of the typical texture orientations appearing in aluminum and i ts alloy sheets were analyzed quantitatively, A comparison of predicte d and experimentally observed earing profiles of pure aluminum and A50 83 alloy sheets was conducted. The results have indicated that: (i) fo r the same texture scatter width, the Goss component (011)(100) genera tes the highest ears, and the surface texture component (111)(110) dis plays the lowest ears in six components of the typical texture in alum inum sheets; (ii) the earing tendency of all of the typical texture co mponents is decreased as the texture scatter width is increased (iii) the different texture scatter widths may cause the earing profiles to change, regardless of the same texture component; and (iv) the earing profiles predicted for pure aluminum and A5083 ahoy sheets are in good agreement with the experimentally measured ears both in shape and in height. The CMTP anisotropic yield function can be employed to predict the earing profiles of textured aluminum sheets. Furthermore, the ana lytical results have emphasized that the approximate in-plane plastic isotropy of textured aluminum sheets can be realized by controlling an appropriate combination of retained rolling texture and recrystalliza tion texture, in addition to generating (111)(110) component. (C) 1998 Elsevier Science S.A. All rights reserved.