Quenching and Partitioning of Multiphase Aluminum-Added Steels
Tuomo Nyyssönen,
Olli Oja,
Petri Jussila,
Ari Saastamoinen,
Mahesh Somani,
Pasi Peura
Affiliations
Tuomo Nyyssönen
Laboratory of Metals Technology, Faculty of Engineering and Natural Sciences, Materials Science, Tampere University, Korkeakoulunkatu 6, 33720 Tampere, Finland
Olli Oja
Product Development, SSAB Europe Oy, Harvialantie 420, 13300 Hämeenlinna, Finland
Petri Jussila
Product Development, SSAB Europe Oy, Harvialantie 420, 13300 Hämeenlinna, Finland
Ari Saastamoinen
Laboratory of Metals Technology, Faculty of Engineering and Natural Sciences, Materials Science, Tampere University, Korkeakoulunkatu 6, 33720 Tampere, Finland
Mahesh Somani
Faculty of Technology, Materials and Mechanical Engineering, University of Oulu, 90014 Oulun Yliopisto, Finland
Pasi Peura
Laboratory of Metals Technology, Faculty of Engineering and Natural Sciences, Materials Science, Tampere University, Korkeakoulunkatu 6, 33720 Tampere, Finland
The quenching and partitioning response following intercritical annealing was investigated for three lean TRIP-type high-Al steel compositions. Depending on the intercritical austenite fraction following annealing, the steels assumed either a ferrite/martensite/retained austenite microstructure or a multiphase structure with ferritic, bainitic and martensitic constituents along with retained austenite. The amount of retained austenite was found to correlate with the initial quench temperature and, depending on the intercritical annealing condition prior to initial quenching, with the uniform and ultimate elongations measured in tensile testing.
