Microstructure Evolution in Bulk Nanostructured Copper during Repeated Cold Rolling

Abstract:

Room temperature rolling tests were performed on a bulk nanostructured Cu with an average grain size of 90 nm. The results indicated a high thickness reduction ( ) of 92% without crack and an increased {220} texture as the rolling processes continued. Microstructure evolution of the deformed nanostructured Cu could be characterized by several deformation stages. Grain growth and coalescence was prevalent in the early deformation stage, while grain boundaries were impaired and replaced by dislocation interactions when 24%. Microhardness of the deformed nanostructured Cu increased sharply to a maximum value of 1.61 GPa at 8% and then slightly decreased to 1.58 GPa at 92%.

• Periodical: Applied Mechanics and Materials (Volume 248)
• Pages: 43-47
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.248.43
• Online since: December 2012
• Authors: Lei Liu, Han Zhuo Zhang, Qin Lan Zhao
• Keywords: Cold Rolling, Cu, Microhardness, Microstructure, Nanostructured Materials

References

[1] M.A. Meyers, A. Mishra, D.J. Benson, Mechanical properties of nanocrystalline materials, Prog. Mater. Sci. 51 (2006) 427-556.

[2] Y. Ivanisenko, L. Kurmanaeva, J. Weissmueller, et al, Deformation mechanisms in nanocrystalline palladium at large strains, Acta Mater. 57 (2009) 3391-3401.

DOI: 10.1016/j.actamat.2009.03.049

[3] J. Hirsch, E. Nes, K. Lücke, Rolling and recrystallization textures in directionally solidified aluminium, Acta Metall. 35 (1987) 427-438.

DOI: 10.1016/0001-6160(87)90249-5

[4] D.A. Hughes, N. Hansen, Microstructural evolution in nickel during rolling from intermediate to large strains, Metall. Trans. A, 24 (1993) 2021-(2037).

DOI: 10.1007/bf02666337

[5] L. Lu, M.L. Sui, K. Lu, Superplastic extensibility of nanocrystalline copper at room temperature, Science 287 (2000) 1463-1466.

DOI: 10.1126/science.287.5457.1463

[6] A. Kulovits, S.X. Mao, J.M.K. Wiezorek, Microstructural changes of nanocrystalline nickel during cold rolling, Acta Mater. 56 (2008) 4836-4845.

DOI: 10.1016/j.actamat.2008.05.040

[7] L. Li, T. Ungár, Y.D. Wang, et al, Simultaneous reductions of dislocation and twin densities with grain growth during cold rolling in a nanocrystalline Ni–Fe alloy, Scripta Mater. 60 (2009) 317-320.

DOI: 10.1016/j.scriptamat.2008.10.031

[8] T.N. Kon'kova, S.Y. Mironov, V.N. Danilenko, et al, Effect of low-temperature rolling on the structure of copper, Phys. Metal Metallogr. 110 (2010) 336-348.

[9] J.B. Jeon, B.J. Li, Y.W. Chang, Molecular dynamics simulation study of the effect of grain size on the deformation behavior of nanocrystalline body-centered cubic iron, Scripta Meter. 64 (2011) 494-497.

DOI: 10.1016/j.scriptamat.2010.11.019