Work Hardening and Microstructural Effect during Dynamic Deformation of Polycrystalline Copper

Abstract:

Dynamic deformation of metals in the elevated strain rate interval of elastic-plastic wave propagation is relevant to technological conditions, such as structural response to impact, ballistic effects, and metal forming processes. In the present work, the work hardening of quasi-static and dynamically deformed copper using a split pressure bar was evaluated for two different grain sizes. From slip lines observations in conditions of both dynamic and quasi-static strain rates, as well as an insensitivity to grain size of the yield stress, it is suggested that copper behave like a single crystal under dynamic deformation. It is shown, for the first time, that the work hardening rate during dynamic deformation of polycrystalline copper remains higher up to the fracture.

• Periodical: Materials Science Forum (Volume 869)
• Pages: 538-542
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.869.538
• Online since: August 2016
• Authors: Sergio Neves Monteiro*, Verônica Scarpini Cândido, Fernanda Santos da Luz, Jheison Lopes dos Santos
• Keywords: Copper, Dynamic Deformation, Microstructure, Work Hardening

References

[1] M.A. Meyers: Dynamic Behavior of Materials. (John Wiley & Sons first ed. New York, 1994).

[2] R.W. Armstrong, S.M. Walley: International Materials Reviews Vol. 53 (2008), p.105.

[3] E. El-Magd: Journal de Physique IV Vol. 4 (1994), p.149.

[4] L.H.L. Louro, A.L.V. Cardoso: J. Phys. IV France Vol. 134 (2006), p.547.

[5] D. Lee: Metallurgical Transactions Vol. 1 (1970), p.1607.

[6] D. Rittel, A. Bhattacharyya, B. Poon, J. Zhao, G. Ravichandran: Materials Science and Engineering A Vol. 447 (2007), p.65.

[7] V.S. Deshpande and N.A. Fleck: Int. J. Impact Eng. Vol. 24 (2000), p.277.

[8] J. Cai, J.I. Le, S. Yang, X. Wang, Y. Li, X. Hou, Q. Guan: Chinese Science Bulletin Vol. 58 (2013), p.2507.

[9] Y.T. Zhu, X.Z. Liao, X.L. Wu: Progress in Materials Science Vol. 57 (2012), p.1.

[10] R.E. Rudd, T.C. Germann, B.A. Remington, J.S. Wark: MRS Bulletin Vol. 35 (2010), p.999.

[11] .N. Nagata and S. Yoshida: Trans Japan Ins t. Met Vol. 13 (1972), p.332.