The effect of high strain-rate deformation on the microstructure and crystallographic texture of Cu in different structure states

Yuechen Dun, V.D. Sitdikov, I.V. Aleksandrov, J.T. Vang
Abstract
The effect of high strain-rate deformation (HSRD) on microstructure and crystallographic texture of Сu in an annealed coarse-grained (CG) state and ultrafine-grain (UFG) state, developed in the result of equal-channel angular pressing (ECAP) has been analyzed here. The results of microstructure and texture researches point out that HSRD leads to the decrease of the grain size, the increase of the elastic root-mean-square distortions, the increase of the dislocation densities and the volume share of the twins both in CG and in UFG states.
Accepted: 24 April 2013
Views: 47   Downloads: 11
References
1.
Valiev R.Z., Islamgaliev R.K., Alexandrov I.V. Bulknanostructured materials from severe plastic deformation,Prog. Mater. Sci., 2000, V. 45, P. 103-189.
2.
Valiev R.Z., Langdon T.G. Principles of equal-channelangular pressing as a processing tool for grain refinement,Prog. Mater. Sci., 2006, V. 51, P. 881–981.
3.
Dalla Torre F., Lapovok R., Sandlin J., Thomson P.F., DaviesC.H.J., Pereloma E.V. Microstructure and properties ofcopper processed by equal channel angular extrusion forone to sixteen passes, Acta Mater., 2004, V. 52, P. 4819-
4.
4. Meyers М.A. Dynamic Behavior of Materials. John Wiley& Sons, New York, 1994, P. 393.
5.
Bhattacharyya A., Rittel D., Ravichandran G. Effect ofstrain rate on deformation texture in OFHC copper,Scripta Mater., 2005, V. 52, P. 657-661.
6.
Furukawa M., Iwahashi Y., Horita Z., Nemoto M., LangdonT.G. The shearing characteristics associated with equalchannelangular pressing, Mater. Sci. Eng., 1998, V. A.257,P. 328-332.
7.
Schafler E., Zehetbauer M., Ungar T. Measurement of screwand edge dislocation densities by means of X-ray Braggprofile analysis, Mater. Sci. Eng., 2001, V. A319–321, P.220-223.
8.
Zhao Y.H., Horita Z., Langdon T.G., Zhu Y.T. Evolutionof Defect Structures during Cold Rolling of Ultrafine-Grained Cu and Cu-Zn Alloys: Influence of StackingFault Energy, Mater. Sci. Eng., 2008, V. A 474, P. 342-347.
9.
Huang W.H., Yu C.Y., Kao P.W., Chang C.P. The effectof strain path and temperature on the microstructuredeveloped in copper processed by ECAE, Mater. Sci.Eng., 2004, V. A366, 221-228.
10.
Toth L.S., Jonas J.J., Daniel D., Bailey J.A. Texturedevelopment and length changes in copper bars subjectedto free end torsion, Text. and Micr., 1992, V. 19, P. 245-
11.
11. Kocks U.F., Tome C.N., Wenk H.R. Texture and anisotropy.UK, Cambridge University Press, 1998, P. 676.
12.
Hu H., Cline R.S., Goodman S.R. Recrystallization, GrainGrowth, and Textures, ed. H. Margolin, Metals Park,1966, P. 295.
13.
Ungar T. Microstructural parameters from X-raydiffraction peak broadening, Scripta Mater., 2004, V. 51,P. 777-781.