Mesoscopic EBSD Analysis and Mesomechanical Behavior of Ridging or Roping in AA6XXX Alloys

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Abstract:

Aluminium alloys for car body manufacturing often show a specific type of band-shaped surface roughening upon stretching, called “ridging” or “roping”. Experimental research as well as modelling attempts have indicated that the evolving surface roughness profiles cannot be understood based on banding of individual surface texture components, like cube or Goss, only. Therefore, it is proposed to study banding on the “mesoscopic” level of texture banding rather than on the “microscopic” one of orientation banding. In mechanical terms, such patterning in the texture would lead to patterning in, for instance, the Lankford coefficient (r-value), so that the mechanical response can be calculated on an intermediate length scale. The present contribution presents a method for calculating r-value patterning from Electron Backscatter diffraction (EBSD) orientation maps. In a first test case of a strongly ridging AA6xxx sheet, indeed patterning in the r-value is found which corresponds to reported patterning of the surface roughness.

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Materials Science Forum (Volumes 702-703)

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955-958

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December 2011

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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[1] P. S. Bate, Scripta Metallurgica et Materialia 27 (1992) 515-520.

DOI: 10.1016/0956-716x(92)90332-9

Google Scholar

[2] A. Beaudoin, J. Bryant, D. Korzekwa, Metallurgical and Materials Transactions A 29 (1998) 2323-2332.

Google Scholar

[3] G. J. Baczynski, R. Guzzo, M. D. Ball, D. J. Lloyd, Acta Materialia 48 (2000) 3361-3376.

DOI: 10.1016/s1359-6454(00)00141-5

Google Scholar

[4] T. A. Bennett, R. H. Petrov, L. A. I. Kestens, Scripta Materialia 61 (2009) 733-736.

Google Scholar

[5] O. Engler, E. Brünger, Materials Science Forum 396-402 (2002) 345-350.

Google Scholar

[6] T. A. Bennett, R. H. Petrov, L. A. I. Kestens, Scripta Materialia 62 (2010) 78-81.

Google Scholar

[7] N. J. Wittridge, R. D. Knutsen, Materials Science and Engineering: A 269 (1999) 205-216.

Google Scholar

[8] O. Engler, J. Hirsch, Materials Science and Engineering A 336 (2002) 249-262.

Google Scholar

[9] P. D. Wu, D. J. Lloyd, A. Bosland, H. Jin, S. R. MacEwen, Acta Materialia 51 (2003) 1945-1957.

DOI: 10.1016/s1359-6454(02)00600-6

Google Scholar

[10] P. D. Wu, D. J. Lloyd, Modelling and Simulation in Materials Science and Engineering 13 (2005) 981-991.

Google Scholar

[11] P. Van Houtte, The MTM-FHM Software System, in: Katholieke Universiteit Leuven, Belgium, 2000.

Google Scholar

[12] P. D. Wu, D. J. Lloyd, S. R. MacEwen, Scripta Materialia 48 (2003) 1243-1248.

Google Scholar