Article (Scientific journals)
Multiscale modeling of back-stress evolution in equal-channel angular pressing: from one pass to multiple passes
Chen, E.; Duchene, Laurent; Habraken, Anne et al.
2010In Journal of Materials Science, 45 (17), p. 4696-4704
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Keywords :
LIMARC
Abstract :
[en] Fine-grained materials produced by equalchannel angular pressing (ECAP) exhibit kinematic hardening due to the existence of a back-stress. This article presents a new dislocation-based model, which is able to describe the tension/compression asymmetry of the ECAP processed commercial purity aluminum. By introducing strain relaxation, and relating the back-stress to the inhomogeneous dislocation density distribution in cell walls and in cell interiors, the model can accurately predict the evolution of the dislocation densities, the cell size, and the back-stress. Compared to the other back-stress models, it takes into account the microstructure evolution and gives a better prediction.
Disciplines :
Materials science & engineering
Author, co-author :
Chen, E.
Duchene, Laurent  ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Département Argenco : Secteur MS2F
Habraken, Anne  ;  Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo
Verlinden, B.
Language :
English
Title :
Multiscale modeling of back-stress evolution in equal-channel angular pressing: from one pass to multiple passes
Publication date :
2010
Journal title :
Journal of Materials Science
ISSN :
0022-2461
eISSN :
1573-4803
Publisher :
Springer Science & Business Media B.V., Dordrecht, Netherlands
Volume :
45
Issue :
17
Pages :
4696-4704
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 20 October 2010

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