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Effect of bake-hardening on the structure-property relationship of multiphase steels for the automotive industry

Timokhina, I. B., Hodgson, P. D., Ringer, S. P., Zheng, R. K. and Pereloma, E. V. 2009, Effect of bake-hardening on the structure-property relationship of multiphase steels for the automotive industry, Steel research international, vol. 80, no. 7, pp. 507-514.

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Title Effect of bake-hardening on the structure-property relationship of multiphase steels for the automotive industry
Author(s) Timokhina, I. B.
Hodgson, P. D.
Ringer, S. P.
Zheng, R. K.
Pereloma, E. V.
Journal name Steel research international
Volume number 80
Issue number 7
Start page 507
End page 514
Total pages 8
Publisher Wiley - V C H Verlag
Place of publication Weinheim, Germany
Publication date 2009
ISSN 1611-3683
1869-344X
Keyword(s) bake-hardening
TRIP steel
DP steel
thermomechanical processing
intercritical annealing
TEM
APT
Summary The effect of a bake-hardening (BH) treatment on the microstructure and mechanical properties has been studied in C-Mn-Si TRansformation Induced Plasticity (TRIP) and Dual Phase (DP) steels after: (i) thermomechanical processing (TMP) and (ii) intercritical annealing (IA). The steels were characterized using X-ray diffraction, transmission electron microscopy (TEM) and three-dimensional atom probe tomography (APT). All steels showed high BH response. however, the DP and trip steels after IA/BH showed the appearance of upper and lower yield points, while the stress-strain behavior of the trip steel after TMP/BH was still continuous. This was due to the higher volume fraction of bainite and more stable retained austenite in the TMP/BH steel, the formation of plastic deformation zones with high dislocation density around the "as-quenched” martensite and “TRIP” martensite in the IA/BH DP steel and IA/BH TRIP steel, respectively.
Language eng
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
Persistent URL http://hdl.handle.net/10536/DRO/DU:30025570

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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Created: Wed, 24 Mar 2010, 16:38:03 EST by Sandra Dunoon