A Dislocation-Based Theory for the Deformation Hardening Behavior of DP Steels : Impact of Martensite Content and Ferrite Grain Size
Joint Authors
Bergström, Yngve
Granbom, Ylva
Sterkenburg, Dirk
Source
Issue
Vol. 2010, Issue 2010 (31 Dec. 2010), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-12-22
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
A dislocation model, accurately describing the uniaxial plastic stress-strain behavior of dual phase (DP) steels, is proposed and the impact of martensite content and ferrite grain size in four commercially produced DP steels is analyzed.
It is assumed that the plastic deformation process is localized to the ferrite.
This is taken into account by introducing a nonhomogeneity parameter, f(ε), that specifies the volume fraction of ferrite taking active part in the plastic deformation process.
It is found that the larger the martensite content the smaller the initial volume fraction of active ferrite which yields a higher initial deformation hardening rate.
This explains the high energy absorbing capacity of DP steels with high volume fractions of martensite.
Further, the effect of ferrite grain size strengthening in DP steels is important.
The flow stress grain size sensitivity for DP steels is observed to be 7 times larger than that for single phase ferrite.
American Psychological Association (APA)
Bergström, Yngve& Granbom, Ylva& Sterkenburg, Dirk. 2010. A Dislocation-Based Theory for the Deformation Hardening Behavior of DP Steels : Impact of Martensite Content and Ferrite Grain Size. Journal of Metallurgy،Vol. 2010, no. 2010, pp.1-16.
https://search.emarefa.net/detail/BIM-487916
Modern Language Association (MLA)
Bergström, Yngve…[et al.]. A Dislocation-Based Theory for the Deformation Hardening Behavior of DP Steels : Impact of Martensite Content and Ferrite Grain Size. Journal of Metallurgy No. 2010 (2010), pp.1-16.
https://search.emarefa.net/detail/BIM-487916
American Medical Association (AMA)
Bergström, Yngve& Granbom, Ylva& Sterkenburg, Dirk. A Dislocation-Based Theory for the Deformation Hardening Behavior of DP Steels : Impact of Martensite Content and Ferrite Grain Size. Journal of Metallurgy. 2010. Vol. 2010, no. 2010, pp.1-16.
https://search.emarefa.net/detail/BIM-487916
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-487916