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Enhanced Grain Growth Behavior of Ferritic Steel during Continuous Cyclic Annealing
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Metallografi.ORCID-id: 0000-0003-4825-7430
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.ORCID-id: 0000-0003-4351-3132
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.
2018 (engelsk)Inngår i: Steel Research International, ISSN 1611-3683, E-ISSN 1869-344X, Vol. 89, nr 11, artikkel-id 1800222Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Microstructural characterization as well as mechanical property determination of a cold-rolled ferritic steel subjected to isothermal and cyclic non-isothermal annealing, has been carried out by utilizing comprehensive experimental analysis. The findings show that the variables of cyclic annealing, that is, amplitude, ramp rate, and intermediate holding time exhibit a great effect on the grain growth kinetics and the evolution of grain boundaries. The resulting grain size of the cyclic annealed steel is mainly attributed to the following factors: 1) the accelerating effect in the grain growth behavior caused by the additional driving force available during cyclic annealing, which increases with increasing amplitude; 2) the retarding effect due to the low equivalent isothermal temperature. Furthermore, the formation of low sigma- coincidence site lattice (sigma CSL) boundaries and the strength of gamma-fiber texture are enhanced through the cyclic annealing compared to the isothermal annealing. The potential advantages of continuous cyclic annealing in the steel industry are explored, in comparison with the conventional isothermal and cyclic annealing with an intermediate soaking time.

sted, utgiver, år, opplag, sider
WILEY-V C H VERLAG GMBH , 2018. Vol. 89, nr 11, artikkel-id 1800222
Emneord [en]
cyclic annealing, grain growth, low sigma CSL boundary, steel strength and ductility
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Identifikatorer
URN: urn:nbn:se:kth:diva-269575DOI: 10.1002/srin.201800222ISI: 000451779200012Scopus ID: 2-s2.0-85050952966OAI: oai:DiVA.org:kth-269575DiVA, id: diva2:1421830
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QC 20200406

Tilgjengelig fra: 2020-04-06 Laget: 2020-04-06 Sist oppdatert: 2020-04-06bibliografisk kontrollert

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