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

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.
Original languageEnglish
Title of host publicationMETAL 2019
Subtitle of host publication 28th International Conference on Metallurgy and Materials ; proceedings
Place of PublicationOstrava
PublisherTANGER Ltd., Ostrava
Pages84 - 89
Number of pages6
ISBN (Electronic)978-80-87294-92-5
Publication statusPublished - 15 Nov 2019
EventMETAL 2019: 28th International Conference on Metallurgy and Materials - Brno, Czech Republic
Duration: 22 May 201924 May 2019

Conference

ConferenceMETAL 2019
CountryCzech Republic
CityBrno
Period22/05/1924/05/19

Keywords

  • Metallurgy
  • Steel
  • Continuous Casting
  • Hot Ductility
  • Low Alloyed
  • Testing Methodes

Fields of Expertise

  • Advanced Materials Science

Fingerprint Dive into the research topics of 'HOT DUCTILITY BEHAVIOR OF A CONTINUOUSLY CAST Ti-Nb MICROALLOYED STEEL'. Together they form a unique fingerprint.

Cite this