Article (Scientific journals)
Microstructure and Mechanical Properties of a Mixed Si-Al TRIP-Assisted Steel Subjected to Continuous Galvanizing Heat Treatments
Mertens, Anne; Bellhouse, Erika M.; McDermid, Joseph R.
2014In Materials Science and Engineering: A: Structural Materials: Properties, Microstructures and Processing, 608, p. 249-257
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Keywords :
Mechanical Characterization; X-ray diffraction; Steel; Austenite; Martensitic transformation
Abstract :
[en] Heat treatments with an isothermal bainitic transformation temperature of 465°C compatible with the continuous galvanizing process were performed on a 0.2C-1.5Mn-1.0Si-0.5Al (wt%) TRIP-assisted steel. The effect of intercritical annealing temperature and isothermal bainitic transformation (IBT) time at 465C on mechanical properties and microstructure were determined. The best combination of strength and ductility was obtained for the lower intercritical annealing temperature of 750°C for an isothermal bainitic transformation time of 90 s at 465°C. However, after intercritical annealing at a higher temperature of 797°C, optimum mechanical properties were obtained for a shorter isothermal bainitic transformation time of 60 s at 465°C, likely due to the lower C content of the intercritical austenite bringing about faster transformation kinetics. It was concluded that varying the intercritical temperature and IBT time can play an important role in the development of a suitable process window to obtain the desired mechanical properties in low alloy TRIP-assisted steels given the constraints associated with the continuous galvanizing process.
Disciplines :
Materials science & engineering
Author, co-author :
Mertens, Anne  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Science des matériaux métalliques
Bellhouse, Erika M.;  ArcelorMittal Dofasco
McDermid, Joseph R.;  McMaster University > McMaster Steel Research Centre
Language :
English
Title :
Microstructure and Mechanical Properties of a Mixed Si-Al TRIP-Assisted Steel Subjected to Continuous Galvanizing Heat Treatments
Publication date :
2014
Journal title :
Materials Science and Engineering: A: Structural Materials: Properties, Microstructures and Processing
ISSN :
0921-5093
eISSN :
1873-4936
Publisher :
Elsevier Science
Volume :
608
Pages :
249-257
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 22 April 2014

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