Effect of molybdenum on the precipitation in ferritic niobium-containing steels produced by strip casting

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dc.contributor.authorJiang, Len_AU
dc.contributor.authorWood, Ken_AU
dc.contributor.authorDorin, Ten_AU
dc.contributor.authorMarceau, RKWen_AU
dc.contributor.authorStanford, Nen_AU
dc.date.accessioned2024-04-08T02:11:56Zen_AU
dc.date.available2024-04-08T02:11:56Zen_AU
dc.date.issued2020-11-11en_AU
dc.date.statistics2023-04-18en_AU
dc.description.abstractMolybdenum (Mo) is often alloyed into the steels containing niobium (Nb), in order to enhance the formation of harder microstructures, such as bainite and acicular ferrite, and denser and finer precipitates. However, the effect of Mo on the nano-precipitates formed in the ferrite of Nb steels is still subject to debate, mostly due to its experimentally challenging nature. In addition, direct strip casting is a revolutionary casting technique that integrates casting and subsequent rolling together with rapid solidification and cooling rates, which not only simplifies the process, but also confers superior energy-saving as compared to conventional alloy thermomechanical processing. In this work, therefore, we have studied the effect of Mo on the precipitation in the ferrite of a Nb-containing micro-alloyed steel produced by strip casting using various advanced characterisation techniques. Isothermal ageing treatments were carried out at 650 ℃ up to 10,000 s to form precipitates, and the strength was measured using shear punch test. Transmission electron microscopy (TEM) observation showed that precipitates were formed along dislocations in both steels with and without Mo. Atom probe tomography (APT) analyses revealed that the addition of Mo increased both size and volume fraction of solute clusters after short ageing times, which provided a much higher cluster strengthening. Precipitation of Nb-rich carbonitrides were found after longer ageing treatments. However, no significant Mo was observed to segregate to the precipitate. Small-angle neutron scattering (SANS) results indicated that the addition of Mo reduced the average precipitate size. X-ray diffraction (XRD) results suggested. © The Authorsen_AU
dc.identifier.citationJiang, L., Wood, K., Dorin, T., Marceau, R., & Standord, N. (2020). Effect of molybdenum on the precipitation in ferritic niobium-containing steels produced by strip casting. Presentation to the ANBUG-AINSE Neutron Scattering Symposium, AANSS 2020, Virtual Meeting, 11th - 13th November 2020. Retrieved from: https://events01.synchrotron.org.au/event/125/attachments/725/1149/AANSS_Abstract_Booklet_Complete_-_1_Page_Reduced.pdfen_AU
dc.identifier.conferenceenddate2020-11-13en_AU
dc.identifier.conferencenameANBUG-AINSE Neutron Scattering Symposium, AANSS 2020en_AU
dc.identifier.conferenceplaceVirtual Meetingen_AU
dc.identifier.conferencestartdate2020-11-11en_AU
dc.identifier.urihttps://events01.synchrotron.org.au/event/125/attachments/725/1149/AANSS_Abstract_Booklet_Complete_-_1_Page_Reduced.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15546en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Nuclear Science and Engineering (AINSE)en_AU
dc.relation.urihttps://events01.synchrotron.org.au/event/125/attachments/725/1149/AANSS_Abstract_Booklet_Complete_-_1_Page_Reduced.pdfen_AU
dc.subjectCastingen_AU
dc.subjectDislocationsen_AU
dc.subjectMolybdatesen_AU
dc.subjectNiobiumen_AU
dc.subjectPrecipitationen_AU
dc.subjectSmall angle scatteringen_AU
dc.subjectTransmission electron microscopyen_AU
dc.subjectSolidificationen_AU
dc.titleEffect of molybdenum on the precipitation in ferritic niobium-containing steels produced by strip castingen_AU
dc.typeConference Abstracten_AU
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