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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review

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.

Original languageEnglish
Title of host publicationTHERMEC 2018
EditorsR. Shabadi, Tara Chandra, M. Jeandin, Mihail Ionescu, C. Richard
PublisherTrans Tech Publications Ltd.
Pages1443-1449
Number of pages7
ISBN (Print)9783035712087
DOIs
Publication statusPublished - 1 Jan 2018
Event10th International Conference on Processing and Manufacturing of Advanced Materials: Thermec 2018 - Paris, France
Duration: 9 Jul 201813 Jul 2018
https://thermec2018.sciencesconf.org/

Publication series

NameMaterials Science Forum
Volume941 MSF
ISSN (Print)0255-5476

Conference

Conference10th International Conference on Processing and Manufacturing of Advanced Materials
Abbreviated titleTHERMEC'2018
CountryFrance
CityParis
Period9/07/1813/07/18
Internet address

Keywords

  • Dynamic recovery
  • Hot deformation
  • Large plastic deformation
  • Ti5553

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fields of Expertise

  • Advanced Materials Science

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