Influence of Thermal History on the Hot Ductility of Ti-Nb Microalloyed Steels
| Autor: | Jakob Six, Sergiu Ilie, Ozan Caliskanoglu, Christof Sommitsch, Mária Dománková, Coline Beal |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy 02 engineering and technology engineering.material Strain rate Condensed Matter Physics Microstructure 020501 mining & metallurgy Continuous casting 0205 materials engineering Mechanics of Materials Ultimate tensile strength engineering General Materials Science Grain boundary Microalloyed steel Deformation (engineering) Composite material Ductility |
| Zdroj: | Materials Science Forum. 879:199-204 |
| ISSN: | 1662-9752 |
| Popis: | The hot ductility of Ti-Nb microalloyed steel has been investigated to evaluate the sensitivity to surface crack formation during the continuous casting process. Tensile samples were subjected to different thermal treatments and were tested at deformation temperatures ranging from 650°C to 1000°C using a strain rate of 10-3s-1. It has been found, that the investigated steel evinced poor ductility over almost the whole testing temperature range characterized by marked grain boundary cracking, irrespective of which thermal cycle has been utilized or whether the samples have been melted or only reheated. Microstructural examinations and supplementary thermo-kinetic computer simulations revealed distinct Ti-Nb precipitation throughout the microstructure being responsible for the deteriorated materials hot ductility. |
| Databáze: | OpenAIRE |
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