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Dislocation Boundary Structure from Low to Medium Strain of Cold Rolling AA3104 Aluminum Alloy

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Abstract

The evolution of the dislocation boundary structure during the cold rolling of the AA3104 aluminum alloy has been investigated using electron channeling contrast (ECC) imaging and electron backscattered diffraction (EBSD) techniques. The results show that there is a strong correlation between the dislocation boundary structure and the grain orientation. No strong effect of strain level or second-phase particles on the structure-orientation correlation is found. Based on these observations, the microstructures can be classified into one of three types: type A grains, containing two sets of geometrically necessary boundaries (GNBs), type B grains, containing one set of GNBs, and type C grains, consisting of a structure of large dislocation cells. Grains with a type A microstructure have orientations near the copper, brass, and Goss orientations; grains with a type B microstructure are primarily near the S orientation; and grains with a type C microstructure have orientations near the cube orientation. The alignment of the extended dislocation boundaries depends strongly on the grain orientation. In most grains, the boundaries are parallel to the traces of the most active {111} slip planes, as identified by a Schmid factor analysis.

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Acknowledgments

This work was supported by the National Science Foundation of China under Contract Nos. 50231030 and 50571051. One of the authors (ZY) gratefully acknowledges Zhang Zhiqing and Huang Tianlin, Chongqing University, for assistance with the EBSD experiments.

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Author notes

  1. Qing Liu (Professor)

    Present address: College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, People’s Republic of China

Authors and Affiliations

  1. Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Room 2703#, Yifu Building, Beijing, 100084, People’s Republic of China

    Zongyong Yao (Ph.D. Student), Andrew Godfrey (Professor) & Wei Liu (Professor)

  2. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, People’s Republic of China

    Guangjie Huang (Professor)

  3. Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People’s Republic of China

    Qing Liu (Professor)

Authors
  1. Zongyong Yao
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  2. Guangjie Huang
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  3. Andrew Godfrey
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  4. Wei Liu
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  5. Qing Liu
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Corresponding author

Correspondence to Qing Liu.

Additional information

Manuscript submitted May 14, 2008.

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Yao, Z., Huang, G., Godfrey, A. et al. Dislocation Boundary Structure from Low to Medium Strain of Cold Rolling AA3104 Aluminum Alloy. Metall Mater Trans A 40, 1487–1497 (2009). https://doi.org/10.1007/s11661-008-9777-x

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  • DOI: https://doi.org/10.1007/s11661-008-9777-x

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