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Bimodal grain size distributions in UFG materials produced by SPD - their evolution and effect on the fatigue and monotonic strength properties

Korn, M., Lapovok, R., Böhner, A., Höppel, H.W. and Mughrabi, H. 2011, Bimodal grain size distributions in UFG materials produced by SPD - their evolution and effect on the fatigue and monotonic strength properties, Kovove materialy, vol. 49, no. 1, pp. 51-63, doi: 10.4149/km-2011-1-51.

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Title Bimodal grain size distributions in UFG materials produced by SPD - their evolution and effect on the fatigue and monotonic strength properties
Author(s) Korn, M.
Lapovok, R.
Böhner, A.
Höppel, H.W.
Mughrabi, H.
Journal name Kovove materialy
Volume number 49
Issue number 1
Start page 51
End page 63
Total pages 13
Publisher Institute of Materials and Machine Mechanics
Place of publication Bratislava, Slovak Republic
Publication date 2011
ISSN 0023-432X
Summary In ultrafine-grained (UFG) materials produced by severe plastic deformation (SPD) techniques such as ECAP (equal channel angular pressing), bimodal grain size distributions have been observed under different circumstances, for example shortly after ECAP, after rest or anneal and/or after mild cyclic deformation at rather low homologous temperature. It has been shown that the mechanical monotonic and fatigue properties of some UFG materials can be modified (sometimes enhanced) by introducing a bimodal grain size distribution by a mild annealing treatment which leads, in some cases, to a good combination of strength and ductility. Here, the conditions under which bimodal grain size distributions evolve by (adiabatic) heating during ECAP and during subsequent annealing or cyclic deformation will be explored, and the effects on the mechanical properties, as studied by the authors and as reported so far in the literature, will be reviewed and discussed. In particular, the role of temperature rise during ECAP will be considered in some detail.
Language eng
DOI 10.4149/km-2011-1-51
Field of Research 091207 Metals and Alloy Materials
0912 Materials Engineering
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2011, Institute of Materials and Machine Mechanics
Persistent URL http://hdl.handle.net/10536/DRO/DU:30076003

Document type: Journal Article
Collection: Institute for Frontier Materials
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