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.ORCID iD for Timokhina, I. B. orcid.org/0000-0003-1989-0835
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
Place of publication Weinheim, Germany
Publication date 2009
ISSN 0177-4832
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
Copyright notice ©2009, Wiley
Persistent URL http://hdl.handle.net/10536/DRO/DU:30025570

Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
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