Effect of stain rate on hot ductility of a Ti-Nb microalloyed steel

Christian Hoflehner, Christof Sommitsch, Marina Melo Gontijo, Jakob Six, Sergiu Ilie

Publikation: KonferenzbeitragPoster

Abstract

Continuously cast steels are known to present poor ductility in a certain critical temperature range, forming what is called the ductility trough. This usually
coincides with the range at which the bending and straightening operations occur during the process (between 700 °C and 1000 °C), making it an important
object of study. This ductility trough in this range is mostly associated with precipitations and the occurrence of strain concentration in the ferrite films formed at
the austenite grain boundaries. To physically simulate the continuous casting process, hot tensile tests on in-situ melted and solidified specimens were
performed. A quantitative measure of the ductility is done with the calculation of the reduction of area (RA), that takes into account the initial and final cross
section of the sample. Some factors can influence the ductility, and consequently the values of RA, such as composition, casting speed, surface quality, cooling
rate, strain rate and others. In this work, the influence of the strain rate on the hot ductility of a Ti-Nb microalloyed steel was studied, as well as its effects on the
ultimate tensile strength.
Originalspracheenglisch
PublikationsstatusVeröffentlicht - 1 Jun 2021
VeranstaltungInternational Conference on Processing and Manufacturing of Advanced Materials: Thermec 2021 - Graz, Virtuell, Österreich
Dauer: 10 Mai 202114 Mai 2021
http://www.thermec2020.tugraz.at
https://www.tugraz.at/events/thermec-2021/home/

Konferenz

KonferenzInternational Conference on Processing and Manufacturing of Advanced Materials
KurztitelTHERMEC 2021
LandÖsterreich
OrtVirtuell
Zeitraum10/05/2114/05/21
Internetadresse

ASJC Scopus subject areas

  • !!Materials Science(all)

Fields of Expertise

  • Advanced Materials Science

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