Deep drawing behaviour of ultrafine grained copper : modelling and experiment

Ma, X., Lapovok, R., Gu, C., Molotnikov, A., Estrin, Y., Pereloma, E.V., Davies, C.H.J. and Hodgson, P. D. 2009, Deep drawing behaviour of ultrafine grained copper : modelling and experiment, Journal of materials science, vol. 44, no. 14, pp. 3807-3812, doi: 10.1007/s10853-009-3515-7.

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Title Deep drawing behaviour of ultrafine grained copper : modelling and experiment
Author(s) Ma, X.
Lapovok, R.
Gu, C.
Molotnikov, A.
Estrin, Y.
Pereloma, E.V.
Davies, C.H.J.
Hodgson, P. D.
Journal name Journal of materials science
Volume number 44
Issue number 14
Start page 3807
End page 3812
Total pages 6
Publisher Springer
Place of publication New York, N.Y.
Publication date 2009-07
ISSN 0022-2461
Keyword(s) ultrafine grained microstructure
plastic deformation
mechanical properties
equal channel angular pressing
bi-axial ductility
Summary Ultrafine grained materials produced by severe plastic deformation methods possess attractive mechanical properties such as high strength compared with traditional coarse grained counterparts and reasonable ductility. Between existing severe plastic deformation methods the Equal Channel Angular Pressing is the most promising for future industrial applications and can produce a variety of ultrafine grained microstructures in materials depending on route, temperature and number of passes during processing. Driven by a rising trend of miniaturisation of parts these materials are promising candidates for microforming processes. Considering that bi-axial deformation of sheet (foil) is the major operation in microforming, the investigation of the influence of the number of ECAP passes on the bi-axial ductility in micro deep drawing test has been examined by experiments and FE simulation in this study. The experiments have showed that high force was required for drawing of the samples processed by ECAP compare to coarse grained materials. The limit drawing ratio of ultrafine grained samples was in the range of 1.9–2.0 with ECAP pass number changing from 1 to 16, while a higher value of 2.2 was obtained for coarse grained copper. However, the notable decrease in tensile ductility with increase in strength was not as pronounced for bi-axial ductility. The FE simulation using standard isotropic hardening model and von Mises yielding criterion confirmed these findings.
Language eng
DOI 10.1007/s10853-009-3515-7
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861206 Structural Metal Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
HERDC collection year 2009
Copyright notice ©2009, Springer Science + Business Media
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Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
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