Article (Scientific journals)
The Developments of Cold-rolled TRIP-assisted Multiphase Steels. Al-alloyed TRIP-assisted Multiphase Steels
Jacques, Pascal J.; Girault, Etienne; Mertens, Anne et al.
2001In ISIJ International, 41 (9), p. 1068-1074
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Keywords :
high strength steels; retained austenite; TRIP and multiphase steels; bainite transformation; mechanical properties
Abstract :
[en] The influence of heat-treating conditions on the retention of carbon-enriched austenite of TRIP-assisted multiphase steel grades containing different amounts of silicon and/or aluminium is investigated. The ensuing mechanical properties resulting from the TRIP effect are also scrutinised. The bainite transformation kinetics was followed by dilatometry whereas a detailed characterisation of the microstructures led to the construction off transformation maps giving the volume fractions of the different phases and the carbon content of the austenite. The role of silicon and aluminium additions (i)on the retention of austenite by partial bainite transformation and (ii) on the mechanical properties is enlightened. A strong influence of the solid-solution strengthening effect of silicon is highlighted. Aluminium seems to be an effective alloying element for the retention of austenite in TRIP-aided steels even if lower strength levels can be attained. A mixed Al-Si TRIP-aided steel seems to be a very good compromise between the processing needs, the required mechanical properties and the industrial constraints.
Disciplines :
Materials science & engineering
Author, co-author :
Jacques, Pascal J.;  Université Catholique de Louvain - UCL > Département des sciences des matériaux et des procédés
Girault, Etienne;  Katholieke Universiteit Leuven - KUL > Department of Metallurgy and Materials Engineering
Mertens, Anne  ;  Université Catholique de Louvain - UCL > Département des sciences des matériaux et des procédés
Verlinden, Bert;  Katholieke Universiteit Leuven - KUL > Department of Metallurgy and Materials Engineering
van Humbeeck, Jan;  Katholieke Universiteit Leuven - KUL > Department of Metallurgy and Materials Engineering
Delannay, Francis;  Université Catholique de Louvain - UCL > Département des sciences des matériaux et des procédés
Language :
English
Title :
The Developments of Cold-rolled TRIP-assisted Multiphase Steels. Al-alloyed TRIP-assisted Multiphase Steels
Publication date :
2001
Journal title :
ISIJ International
ISSN :
0915-1559
eISSN :
1347-5460
Publisher :
Inron and Steel Institute of Japan, Tokyo, Japan
Volume :
41
Issue :
9
Pages :
1068-1074
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 12 December 2011

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