Microstructure evolution of ti-5al-5v-5mo-3cr after hot deformation at large and moderate strains

María Cecilia Poletti*, Ricardo Buzolin, Sanjev Kumar, Peng Wang, Thierry Franz Jules Simonet-Fotso

*Korrespondierende/r Autor/-in für diese Arbeit

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

Abstract

This work deals with the analysis and modelling of the microstructural evolution of the metastable titanium alloy Ti-5Al-5V-5Mo-3Cr during hot deformation up to moderate and large strains. Experimental flow curves and deformed samples are obtained by hot compression and hot torsion tests using a Gleeble ® 3800 device. The samples are deformed above and below the beta transus temperature and in a wide range of strain rates. Microstructures are characterized after deformation and in-situ water quenching using light optical and scanning electron microscopy and electron back scattered diffraction (EBSD). Dynamic recovery of the beta phase is found to be the main deformation mechanism up to moderated strains. By increasing the strain, continuous dynamic recrystallization (cDRX) is confirmed by the progressive conversion of low angle boundaries into high-angle boundaries. Alpha phase plays a secondary role in the deformation of the material by pinning the movement of beta high angle grain boundaries (HAGB). The evolution of the microstructure is modelled using dislocation density as internal variable in the single β field.

Originalspracheenglisch
TitelTHERMEC 2018
Redakteure/-innenR. Shabadi, Tara Chandra, M. Jeandin, Mihail Ionescu, C. Richard
Herausgeber (Verlag)Trans Tech Publications Ltd.
Seiten1443-1449
Seitenumfang7
ISBN (Print)9783035712087
DOIs
PublikationsstatusVeröffentlicht - 1 Jan. 2018
Veranstaltung10th International Conference on Processing and Manufacturing of Advanced Materials: Thermec 2018 - Paris, Frankreich
Dauer: 9 Juli 201813 Juli 2018
https://thermec2018.sciencesconf.org/

Publikationsreihe

NameMaterials Science Forum
Band941 MSF
ISSN (Print)0255-5476

Konferenz

Konferenz10th International Conference on Processing and Manufacturing of Advanced Materials
KurztitelThermec 2018
Land/GebietFrankreich
OrtParis
Zeitraum9/07/1813/07/18
Internetadresse

ASJC Scopus subject areas

  • Werkstoffwissenschaften (insg.)
  • Physik der kondensierten Materie
  • Werkstoffmechanik
  • Maschinenbau

Fields of Expertise

  • Advanced Materials Science

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