Grain structure evolution during cryogenic rolling of alpha brass

T. Konkova, S. Mironov, A. Korznikov, G. Korznikova, M.M. Myshlyaev, S.L. Semiatin

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Abstract

High-resolution electron backscatter diffraction (EBSD) was used to study grain structure development during cryogenic rolling of Cu-29.5Zn brass. Microstructure evolution was found to be broadly similar to that occurring during rolling at room temperature. Specifically, favorably-oriented grains (Copper {1 1 2} 〈1 1 1〉 and S {1 2 3}〈6 3 4〉) experienced profuse deformation twinning followed by extensive shear banding. This eventually produced an ultrafine structure with a mean grain size of ∼0.2 μm. On the other hand, grains with crystallographic orientations close to Brass {1 1 0}〈1 1 2〉 and Goss {1 1 0}〈1 0 0〈 were found to be stable against twinning/shear banding and thus showed no significant grain refinement. As a result, the final structure developed in heavily-rolled material was distinctly inhomogeneous consisting of mm-scale remnants of original grains with poorly developed substructure and ultra-fine grain domains.

Original languageEnglish
Pages (from-to)140-147
Number of pages8
JournalJournal of Alloys and Compounds
Volume629
Early online date8 Jan 2015
DOIs
Publication statusPublished - 25 Apr 2015

Keywords

  • grain boundaries
  • microstructure
  • nanofabrication
  • nanostructured materials
  • scanning electron microscopy

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    Konkova, T., Mironov, S., Korznikov, A., Korznikova, G., Myshlyaev, M. M., & Semiatin, S. L. (2015). Grain structure evolution during cryogenic rolling of alpha brass. Journal of Alloys and Compounds, 629, 140-147. https://doi.org/10.1016/j.jallcom.2014.12.241