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On the Bauschinger effect in dual phase steel at high levels of strain

Weiss, M., Kupke, A., Manach, P.Y., Galdos, L. and Hodgson, P. D. 2015, On the Bauschinger effect in dual phase steel at high levels of strain, Materials science and engineering A, vol. 643, pp. 127-136, doi: 10.1016/j.msea.2015.07.037.

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Title On the Bauschinger effect in dual phase steel at high levels of strain
Author(s) Weiss, M.ORCID iD for Weiss, M. orcid.org/0000-0002-1845-6343
Kupke, A.
Manach, P.Y.
Galdos, L.
Hodgson, P. D.
Journal name Materials science and engineering A
Volume number 643
Start page 127
End page 136
Total pages 10
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015-09-03
ISSN 0921-5093
Keyword(s) Bauschinger effect
Compression tension test
Dual phase steel
Microstructure
Shear reversal test
Summary The effect of volume fraction and hardness of martensite on the Bauschinger effect in Dual Phase (DP) steel was investigated for strain levels close to those observed in automotive stamping. Five different grades of DP steel were produced by controlled heat treatment allowing the examination of the Bauschinger effect for three different volume fractions of martensite and three levels of martensite hardness. Compression-tension and shear reversal tests were performed to examine the Bauschinger effect at high levels of forming strain. Good correlation between the shear reversal and the compression-tension test was observed suggesting that for DP steel, shear stress strain data, converted to equivalent stress-strain, may be applied directly to characterize kinematic hardening behavior for numerical simulations. Permanent softening was observed following strain reversal and increased with martensite volume fraction and pre-strain level. While the Bauschinger ratio saturates at 3% pre-strain, the Bauschinger strain increases linearly with forming strain without showing saturation. This suggests that to model material behavior accurately in forming processes involving complex loading paths and high levels of strain, test data generated at high strain is required.
Language eng
DOI 10.1016/j.msea.2015.07.037
Field of Research 091307 Numerical Modelling and Mechanical Characterisation
Socio Economic Objective 861205 Sheet Metal Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30076086

Document type: Journal Article
Collection: Institute for Frontier Materials
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Created: Fri, 21 Aug 2015, 10:53:16 EST

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