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Characterization of the bake-hardening behavior of transformation induced plasticity and dual-phase steels using advanced analytical techniques

Timokhina, Ilana B., Pereloma, Elena V., Ringer, Simon P., Zheng, Rongkun and Hodgson, Peter D. 2010, Characterization of the bake-hardening behavior of transformation induced plasticity and dual-phase steels using advanced analytical techniques, ISIJ international, vol. 50, no. 4, pp. 574-582, doi: 10.2355/isijinternational.50.574.

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Title Characterization of the bake-hardening behavior of transformation induced plasticity and dual-phase steels using advanced analytical techniques
Author(s) Timokhina, Ilana B.ORCID iD for Timokhina, Ilana B. orcid.org/0000-0003-1989-0835
Pereloma, Elena V.
Ringer, Simon P.
Zheng, Rongkun
Hodgson, Peter D.
Journal name ISIJ international
Volume number 50
Issue number 4
Start page 574
End page 582
Total pages 9
Publisher Nippon Tekko Kyokai
Place of publication Tokyo, Japan
Publication date 2010
ISSN 0915-1559
1347-5460
Keyword(s) transformation-induced plasticity
TRIP steel
DP steel
bake-hardening
transmission electron microscopy
atom probe tomography
dislocation structure
Summary The bake-hardening (BH) behavior of TRansformation Induced Plasticity (TRIP) and Dual-Phase (DP) steels after intercritical annealing (IA) has been studied using transmission electron microscopy, X-ray diffraction and three dimensional atom probe tomography. It was found for the DP steel that carbon can segregate to dislocations in the ferrite plastic deformation zones where there is a high dislocation density around the "asquenched" martensite. The carbon pinning of these dislocations, in turn, increases the yield strength after aging. It was shown that bake-hardening also leads to rearrangement of carbon in the martensite leading to the formation of rod-like low temperature carbides in the DP steel. Segregation of carbon to microtwins in retained austenite of the TRIP steel was also evident. These factors, in combination with the dislocation rearrangement in ferrite through the formation of cells and microbands in the TRIP steel after pre-straining, lead to the different bake-hardening responses of the two steels.
Language eng
DOI 10.2355/isijinternational.50.574
Indigenous content off
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2010
Copyright notice ©2010, ISIJ
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30034383

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.