DOI: 10.4028/www.scientific.net/msf.503-504.51. On the Microstructure of HPT Processed Cu under Variation of Deformation Parameters

On the Microstructure of HPT Processed Cu under Variation of Deformation Parameters

10.4028/www.scientific.net/msf.503-504.51

Crossref journal-article

Trans Tech Publications, Ltd.

Materials Science Forum (2457)

Abstract

The evolution of strength characteristics and the microstructure of copper subjected to high pressure torsion (HPT) are studied under variation of strain and hydrostatic pressure. Measurements of Multiple X-ray Bragg Profile Analysis (MXPA) yield microstructural parameters like dislocation density and arrangement, as well as crystallite (domain) size and distribution, and long-range internal stresses. TEM investigations are carried out to analyse the structural elements and to compare them with the results of MXPA. The strength behaviour is studied by microhardness measurements. The investigations are performed within wide ranges of resolved shear strains = 1 to 400 and of applied pressures p = 0.8 to 8 GPa. The onset of the deformation stages IV and V is strongly affected by the hydrostatic pressure i.e. shifted to higher values of stress and strain with increasing pressure. The experimental results indicate the occurrence of recovery effects, which seem to be of static as well as of dynamic nature, and to be responsible for extended ductility in SPD materials.

Bibliography

Schafler, E., Dubravina, A., Mingler, B., Karnthaler, H. P., & Zehetbauer, M. J. (2006). On the Microstructure of HPT Processed Cu under Variation of Deformation Parameters. Materials Science Forum, 503â504, 51â56.

Authors 5

Erhard Schafler (first)
Anna Dubravina (additional)
Bernhard Mingler (additional)
Hans Peter Karnthaler (additional)
Michael Josef Zehetbauer (additional)

References 14 Referenced 20

A. Dubravina, M. J. Zehetbauer, E. Schafler, I.V. Alexandrov, Mater. Sci. Eng A 387-389, 817-821 (2004). (10.1016/j.msea.2004.03.093)
Zehetbauer, M., Proc. 2nd Int. Symp. on Ultrafine Grained Materials, 2002 TMS Annual Meeting, Seattle, USA, The Minerals, Metals & Materials Society, Warrendale, 669 (2002). (10.1002/9781118804537.ch75)
M. Zehetbauer ,H.P. Stuewe, A. Vorhauer, E. Schafler, J. Kohout, Adv. Eng. Mater. 5(5), 330 (2003). (10.1002/adem.200310090)
M.J. Zehetbauer, L. Zeipper, E. Schafler, Modelling Mechanical Properties of SPD Materials during and after Severe Plastic Deformation, Proc. NATO-ARW workshop Nanostructured Materials by High-Pressure Severe Plastic Deformation, Donetsk, Ukraine 2004, ed. Y. Zhu, Kluwer Acad. Publ., in press. (10.1007/1-4020-3923-9_30)
G. Ribarik, T. Ungár, J. Gubicza, J. Appl. Cryst. 34, 669 (2001).
T. Ungár, J. Gubicza, G. Ribarik, A. Borbely, J. Appl. Cryst. 34, 298 (2001).
H. Mughrabi, Acta metall. 31, 1367 (1983). (10.1016/0001-6160(83)90007-X)
Mughrabi, H., Ungár, T., Kienle, W., Wilkens, M. (1986) Phil. Mag. 53, 793. (10.1080/01418618608245293)
M. Zehetbauer, V. Seumer, Acta metall. mater. 41, 577 (1993). (10.1016/0956-7151(93)90088-A)
T. Hebesberger, H.P. Stüwe, A. Vorhauer, F. Wetscher, R. Pippan, Acta. Mater. 53, 393 (2005). (10.1016/j.actamat.2004.09.043)
M. Zehetbauer, T. Ungár, R. Kral, A. Borbely, E. Schafler, B. Ortner, H. Amenitsch, S. Bernstorff, Acta Mater. 47, 1053 (1999). (10.1016/s1359-6454(98)00366-8)
T. Ungár, M. Zehetbauer, Scripta Mater. 35, 1467 (1996).
E. Schafler, K. Simon, S. Bernstorff, P. Hanák, G. Tichy, T. Ungár, M.J. Zehetbauer, Acta. Mater. 53, 315 (2005). (10.1016/j.actamat.2004.09.025)
T. Hebesberger, A. Vorhauer, H.P. Stuewe, R. Pippan, Proc. 2nd Int. Conf. on Nanomaterials by Severe Plastic Deformation, Vienna 2002, J. Wiley VCH Weinheim (Germany), 426 (2004).

Dates

Type	When
Created	16 years, 5 months ago (March 11, 2009, 2:55 p.m.)
Deposited	3 months, 1 week ago (May 21, 2025, 4:09 p.m.)
Indexed	3 months, 1 week ago (May 22, 2025, 12:39 a.m.)
Issued	19 years, 7 months ago (Jan. 15, 2006)
Published	19 years, 7 months ago (Jan. 15, 2006)
Published Online	19 years, 7 months ago (Jan. 15, 2006)

Funders 0

None

BibTeX

@article{Schafler_2006, title={On the Microstructure of HPT Processed Cu under Variation of Deformation Parameters}, volume={503–504}, ISSN={1662-9752}, url={http://dx.doi.org/10.4028/www.scientific.net/msf.503-504.51}, DOI={10.4028/www.scientific.net/msf.503-504.51}, journal={Materials Science Forum}, publisher={Trans Tech Publications, Ltd.}, author={Schafler, Erhard and Dubravina, Anna and Mingler, Bernhard and Karnthaler, Hans Peter and Zehetbauer, Michael Josef}, year={2006}, month=jan, pages={51–56} }

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