In Situ Annealing of Severe Plastic Deformed OFHC Copper


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A pure OFHC copper is subjected to severe plastic deformation (SPD) by a well defined high pressure torsion process at ambient temperature. The change in microstructure of samples deformed to different strains, up to ε=64, is investigated in-situ, during annealing at 170°C, within a scanning electron microscope. The spatial distribution of nucleation sites changes significantly with increasing strain from nucleation at triple junctions and grain boundaries to a random distribution of sites for von Mises equivalent strains beyond ε=4. The resulting mean size of recrystallized grains is about 6.75 times larger than the mean microstructural size of the corresponding as-deformed state. For strains larger than ε=16 the recrystallized microstructure appears to be independent of preceding strain. A detailed investigation of the nucleation of recrystallized grains following very large strains shows that certain microstructural elements are favoured as nuclei and were particularly taken into account.



Materials Science Forum (Volumes 558-559)

Edited by:

S.-J.L. Kang, M.Y. Huh, N.M. Hwang, H. Homma, K. Ushioda and Y. Ikuhara




S. Scheriau et al., "In Situ Annealing of Severe Plastic Deformed OFHC Copper", Materials Science Forum, Vols. 558-559, pp. 1345-1351, 2007

Online since:

October 2007




[1] Datasheet: OFHC max. content of impurities. Technical report, Buntmetall Amstetten GmbH, (2005).

[2] Shin DH, Ahn BD, Cho HS and Park KT. In Ultrafine Grained Materials III.

[3] Ito Y Tsuji N and Saito Y. Scripta Materialia, 47: 893, (2002).

[4] Islamgaliev RK Valiev RZ and Alexandrov IV. Progress in Materials Sciences, 45: 103, (2000).

[5] Pak JJ Shin DH and Kim YK. Materials Science Engineering, 323: 409, (2002).

[6] Vorhauer A, Kleber S and Pippan R. Microstructure of austenitic and ferritic steels produced by SPD and subsequent annealing. In Ultrafine grained materials III, page 629, (2004).

[7] Valiev RZ. Advanced Engineering Materials, 5(5): 296, (2003).

[8] Vorhauer A, Rumpf C, Granitzer P, Kleber S, Krenn H and Pippan R. Materials Science Forum, (503-504): 299-304, (2006).

DOI: 10.4028/

[9] Gleiter H. Acta Mater, (48): 1, (2000).

[10] Humphreys FJ and Hatherly M. Recrystallization and related annealing phenomena, pages 127-392. Pergamon press, (1996).

[11] Prangnell PB Humphreys FJ and Bowen JR. Phil. Trans R. Soc Lond. A, 357: 1663, (1999).

[12] Bailey JE and Hirsch PB. Proc Roy Soc A, (267): 11, (1962).

[13] Bellier JE and Doherty RD. Acta Metall, (25): 521, (1977).

[14] Engler O. Metall Mater Trans A, (30): 1517, (1999).

[15] Engler O. Acta Mater, (49): 1237, (2002).

[16] Randel V and Engler O. Introduction to Texture Analysis: Macrotexture, Microtexture and Orientation Mapping. Gordon and Breach Science Publishers, Amsterdam, (2000).

[17] Wright SI Adams BL and Kunze K. Metall Trans A, (24): 819, (1993).

[18] Humphreys FJ. Acta Materialia, (45): 4231-4240, (1997).

[19] Humphreys FJ and Harterly M. Recrystallization and related phenomena. Pergamon Press, (2003).

[20] Tarasiuk J Gerber Ph and Chauveau Th. Acta Mater, (51): 6359, (2003).

[21] Hughes DA and Hansen N. Acta Metallurgica, (45): 3871, (1997).

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