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Equal-channel angular pressing: influence of die design on pressure forces, strain homogeneity, and corner gap formation

Sordi, Vitor L., Mendes Filho, Anibal A., Valio, Gustavo T., Springer, Phillip, Rubert, Jose B. and Ferrante, Maurizio 2016, Equal-channel angular pressing: influence of die design on pressure forces, strain homogeneity, and corner gap formation, Journal of materials science, vol. 51, no. 5, pp. 2380-2393, doi: 10.1007/s10853-015-9547-2.

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Title Equal-channel angular pressing: influence of die design on pressure forces, strain homogeneity, and corner gap formation
Author(s) Sordi, Vitor L.
Mendes Filho, Anibal A.
Valio, Gustavo T.
Springer, Phillip
Rubert, Jose B.
Ferrante, Maurizio
Journal name Journal of materials science
Volume number 51
Issue number 5
Start page 2380
End page 2393
Total pages 14
Publisher Springer
Place of publication New York, N.Y.
Publication date 2016-03
ISSN 0022-2461
1573-4803
Summary The results of experiments directed to the optimization of Equal-channel angular pressing (ECAP) die design can be affected by the material response to deformation, thus making difficult to isolate the die performance, particularly with respect to the assessment of strain homogeneity. In the present work, a completely ‘‘inert’’ material was employed for the physical simulation of the ECAP deformation, thus permitting an unequivocal analysis of the die performance. Such material is the Pb–62 %Sn alloy, of which absence of strain hardening, that is,full recrystallization during or after equal-channel angular pressing, was here ascertained. As a consequence, the corner gap effect, a phenomenon known to decrease strain homogeneity, will depend only on die geometry. The study was extended to the case in which the strain distribution depends on both outer (R) and inner (r) curvature radii. Results show that the size of the corner gap is related to the deformation homogeneity of the billet, and the pressing forces are reduced for large outer radii. Emphasis was given to the quantitative measurement of the corner gap size, its relationship with the von Mises strain, and itsdistribution within the ECAP-processed billet, for different Rr combinations.
Language eng
DOI 10.1007/s10853-015-9547-2
Field of Research 099999 Engineering not elsewhere classified
09 Engineering
03 Chemical Sciences
Socio Economic Objective 0 Not Applicable
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2015, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30087311

Document type: Journal Article
Collection: Institute for Frontier Materials
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