Skip to main content Accessibility help
×
×
Home

Effect of electric-current pulses on grain-structure evolution in cryogenically rolled copper

  • Tatyana Konkova (a1), Irshat Valeev (a1), Sergey Mironov (a2), Alexander Korznikov (a3), Michail Myshlyaev (a4) and S. Lee Semiatin (a5)...
Abstract

The effect of electric-current pulses on the evolution of microstructure and texture in cryogenically rolled copper was determined. The pulsed material was found to be completely recrystallized, and the recrystallization mechanism was deduced to be similar to that operating during conventional static annealing. The microstructural changes were explained simply in terms of Joule heating. A significant portion of the recrystallization process was concluded to have occurred after pulsing; i.e., during cooling to ambient temperature. The grain structure and microhardness were shown to vary noticeably in the heat-affected zone (HAZ); these observations mirrored variations of temper colors. Accordingly, the revealed microstructure heterogeneity was attributed to the inhomogeneous temperature distribution developed during pulsing. In the central part of the HAZ, the mean grain size increased with current density and this effect was associated with the temperature rise per se. This grain size was slightly smaller than that in statically recrystallized specimens.

Copyright
Corresponding author
a) Address all correspondence to this author. e-mail: smironov@material.tohoku.ac.jp
References
Hide All
1. Li, Y.S., Tao, N.R., and Lu, K.: Microstructural evolution and nanostructure formation in copper during dynamic plastic deformation at cryogenic temperatures. Acta Mater. 56, 230 (2008).
2. Zhang, Y., Tao, N.R., and Lu, K.: Mechanical properties and rolling behaviors of nano-grained copper with embedded nano-twin bundles. Acta Mater. 56, 2429 (2008).
3. Huang, Y. and Prangnell, P.B.: The effect of cryogenic temperature and change in deformation mode on the limiting grain size in a severely deformed dilute aluminium alloy. Acta Mater. 56, 1619 (2008).
4. Konkova, T., Mironov, S., Korznikov, A., and Semiatin, S.L.: Microstructural response of pure copper to cryogenic rolling. Acta Mater. 58, 5262 (2010).
5. Zherebtsov, S.V., Dyakonov, G.S., Salem, A.A., Sokolenko, V.I., Salishchev, G.A., and Semiatin, S.L.: Formation of nanostructures in commercial-purity titanium via cryorolling. Acta Mater. 61, 1167 (2013).
6. Konkova, T., Mironov, S., Korznikov, A., Myshlyaev, M.M., and Semiatin, S.L.: Annealing behaviour of cryogenically-rolled copper. Mater. Sci. Eng., A 585, 178 (2013).
7. Conrad, H., Sprecher, A.F., Cao, W.D., and Lu, X.P.: Electroplasticity – The effect of electricity on the mechanical properties of metals. JOM 42, 28 (1990).
8. Conrad, H., Karam, N., and Mannan, S.: Effect of electric current pulses on the recrystallization of copper. Scr. Metall. 17, 411 (1983).
9. Conrad, H., Karam, N., and Mannan, S.: Effect of prior cold work on the influence of electric current pulses on the recrystallization of copper. Scr. Metall. 18, 275 (1984).
10. Conrad, H., Karam, N., Mannan, S., and Sprecher, A.F.: Effect of electric current pulses on the recrystallization kinetics of copper. Scr. Metall. 22, 235 (1988).
11. He, C.S., Zhang, Y.D., Wang, Y.N., Zhao, X., Zuo, L., and Esling, C.: Texture and microstructure development in cold-rolled interstitial free (IF) steel sheet during electric field annealing. Scr. Mater. 48, 737 (2003).
12. Wang, X., Dai, W., Wang, R., Tian, X., and Zhao, X.: Enhanced phase transformation and variant selection by electric current pulses in a Cu-Zn alloy. J. Mater. Res. 29, 975 (2014).
13. Valeev, I.Sh. and Kamalov, Z.G.: Structure evolution in copper resulting from the effect of powerful current pulses. J. Mater. Eng. Perform. 12, 272 (2003).
14. Dobatkin, S.V., Salischev, G.A., Kuznetsov, A.A., and Konkova, T.N.: Submicrocrystalline structure in copper after different severe plastic deformation schemes. Mater. Sci. Forum 558559, 189 (2007).
15. Knoepfel, H.: Pulsed High Magnetic Fields (North-Holland Publishing Company, Amsterdam, Netherlands, 1970), p. 392.
16. Konkova, T., Mironov, S., Korznikov, A., and Semiatin, S.L.: On the room-temperature annealing of cryogenically rolled copper. Mater. Sci. Eng., A 528, 7432 (2011).
17. Pospiech, J. and Lucke, K.: The rolling texture in copper and α-brass discussed in terms of the orientation distribution function. Acta Mater. 23, 997 (1975).
18. Constable, F.H.: Spectrophotometric observations on the growth of oxide films on iron, nickel, and copper. Proc. R. Soc. London, Ser. A 117, 376 (1928).
19. Semiatin, S.L., Sukonnik, I.M., and Seetharaman, V.: An analysis of static recrystallization during continuous, rapid heat treatment. Metall. Mater. Trans. A 27, 2051 (1996).
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Materials Research
  • ISSN: 0884-2914
  • EISSN: 2044-5326
  • URL: /core/journals/journal-of-materials-research
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed