HOT DUCTILITY BEHAVIOR OF A CONTINUOUSLY CAST Ti-Nb MICROALLOYED STEEL

Christian Hoflehner, Coline Beal, Christoph Sommitsch, Jakob Six, Sergiu Ilie

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem Konferenzband

Abstract

The hot ductility behaviour of a Ti-Nb micro alloyed steel was investigated to evaluate the probability of surface
crack formation during the continuous casting process, by performing hot tensile tests. The testing
temperatures are ranging from 1100 °C to 700 °C. The effects of testing temperature range and deformation
rate on hot ductility were investigated. The results show that this steel exhibits poor ductility over almost the
whole testing temperature range. The ductility starts to decrease at 1000 °C in the single phase γ-region,
characterized by grain boundary sliding and surface cracks, reaches a minimum in the two-phase α-γ-region
at 750 °C and slightly increases with decreasing testing temperature. Furthermore, low deformation rates
severely decrease the ductility behaviour. Microstructural examinations and supplementary thermo-kinetic
computer simulations revealed distinct Ti-Nb precipitation throughout the microstructure being responsible for
the deteriorated materials hot ductility.
Originalspracheenglisch
TitelMETAL 2019
Untertitel 28th International Conference on Metallurgy and Materials ; proceedings
ErscheinungsortOstrava
Herausgeber (Verlag)TANGER Ltd., Ostrava
Seiten84 - 89
Seitenumfang6
ISBN (elektronisch)978-80-87294-92-5
PublikationsstatusVeröffentlicht - 15 Nov 2019
VeranstaltungMETAL 2019: 28th International Conference on Metallurgy and Materials - Brno, Tschechische Republik
Dauer: 22 Mai 201924 Mai 2019

Konferenz

KonferenzMETAL 2019
LandTschechische Republik
OrtBrno
Zeitraum22/05/1924/05/19

Fields of Expertise

  • Advanced Materials Science

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  • Dieses zitieren

    Hoflehner, C., Beal, C., Sommitsch, C., Six, J., & Ilie, S. (2019). HOT DUCTILITY BEHAVIOR OF A CONTINUOUSLY CAST Ti-Nb MICROALLOYED STEEL. in METAL 2019: 28th International Conference on Metallurgy and Materials ; proceedings (S. 84 - 89). Ostrava: TANGER Ltd., Ostrava.