The effect of starting grain size on the evolution of microstructure and texture in nickel during processing by cross-rolling

• Published in: Materials characterization Vol. 76; pp. 21 - 27
• Main Authors: Bhattacharjee, P.P., Joshi, M., Chaudhary, V.P., Zaid, M.
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 01.02.2013; Elsevier
• Subjects: Brasses; Coarsening; Cross rolling; Cross-disciplinary physics: materials science; rheology; Deformation structure; Electron backscatter diffraction; Exact sciences and technology; Grain size; Materials science; Microstructure; Nickel; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physics; Solidification; Surface layer; Texture; Nickel; Electron backscatter diffraction; Deformation structure; Cross-rolling; Texture; Grain size; Deformation; Electron diffraction; Microstructure
• ISSN: 1044-5803; 1873-4189
• DOI: 10.1016/j.matchar.2012.11.005

Nickel sheets having starting grain sizes of 36μm (fine grained starting material) and 800μm (coarse grained starting material) were deformed by unidirectional and cross cold rolling routes up to 90% reduction in thickness. Unidirectional rolled sheets developed pure metal or copper type deformation texture irrespective of the starting grain size. However, significant differences could be observed in the texture of the two materials processed by cross-rolling. The most remarkable difference in the texture of the cross-rolled materials was much stronger Brass ({011} ) and rotated Brass ({011} ) components in the fine grained starting material as compared to the coarse grained starting material. The observed differences in texture during processing by the cross-rolling route might be attributed to the different grain subdivision behavior in coarse grained starting material due to large starting grain size which correlated well with the very diffuse and fragmented microstructure developed in this material. ► The effect of starting grain size on cross-rolling texture is reported in nickel. ► Two nickel sheets with 36μm (fine) and 800μm (coarse) are investigated. ► Copper type texture developed in straight rolling irrespective of the grain size. ► BS and rotated BS orientations are observed in cross-rolled fine grained material. ► Above components are absent in cross-rolled coarse grained material.