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Microstructure and tensile properties of a 0.20C-4.86Mn steel after short intercritical-annealing times
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Physical Metallurgy.ORCID iD: 0000-0002-0337-082X
2019 (English)In: Materials Science and Technology, ISSN 0267-0836, E-ISSN 1743-2847, Vol. 35, no 2, p. 220-230Article in journal (Refereed) Published
Abstract [en]

This work studies the microstructure and tensile properties of a cold-rolled Fe-0.20C-4.86Mn (mass %) steel after short intercritical annealing (IA) times using scanning and transmission electron microscopy, and uniaxial tensile tests. The short IA time is applied to represent the process characteristics of the industrial continuous annealing line. The experimental results show that IA temperature has a strong influence on the final microstructure and tensile properties while IA time has less. The fractions of retained austenite are much higher after IA at 650 and 675 degrees C than the other IA temperatures, and thus improving elongation. Simulations using the DICTRA software and constitutive modelling are further performed to assist the understanding of the microstructure evolution and stress-strain curves.

Place, publisher, year, edition, pages
TAYLOR & FRANCIS LTD , 2019. Vol. 35, no 2, p. 220-230
Keywords [en]
Medium Mn steel, intercritical annealing, retained austenite, martensitic transformation, tensile properties
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-241307DOI: 10.1080/02670836.2018.1550864ISI: 000454770200009OAI: oai:DiVA.org:kth-241307DiVA, id: diva2:1282729
Note

QC 20190125

Available from: 2019-01-25 Created: 2019-01-25 Last updated: 2019-01-25Bibliographically approved

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Huyan, Fei

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