• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Laboratoire Mechanics, Surfaces and Materials Processing (MSMP)
  • View Item
  • Home
  • Laboratoire Mechanics, Surfaces and Materials Processing (MSMP)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Submicrocristalline structure and dynamic recovery of cold flowformed ELI grade Ti-6Al-4V

Communication avec acte
Author
MASSONI, Elisabeth
ccDEPRIESTER, Dorian
1158 Centre de Mise en Forme des Matériaux [CEMEF]

URI
http://hdl.handle.net/10985/11941
Date
2013

Abstract

Flowforming is a means to produce seamless tubes by plastic deformation at room temperature. It consists in reducing the thickness of a tubular part mounted on a mandrel by deforming it using several rollers translating along the tube axis, while the tube is rotating along its axis. Thanks to the high compressive stresses, and to the incremental nature of the deformation process, flowforming can lead to a high thickness reduction and thus to high elongation of the deformed tubes. Ti-6Al-4V (Extra Low Interstitial grade) tubes have been deformed by cold flowforming, with a thickness reduction ratio higher than 60%, and their microstructures have been investigated using light optical microscopy (LOM), scanning electron microscopy (SEM) and electron backscattered diffraction (EBSD). Based on EBSD data, a post-processing analysis has been performed in order to study the texture of the flowformed parts. Optical Microscopy showed that the material could be deformed without displaying flow instability such as adiabatic shear banding, despite the fact that it has been processed out of the stable processing maps (high strain rate and low temperature). It also evidenced a major deformation along the tube axis accompanied with a slight twist due to torsion stress. EBSD analysis indicated the occurrence of continuous dynamic recrystallization, which is rarely reported in the α-β domain of such alloys. The recovery/ recrystallization effects resulted in a submicrocrystalline equiaxed structure, which is consistent with that previously reported for Ti-6Al-4V subjected to severe plastic deformation (SPD). The texture of the hexagonal α-phase appeared to be similar to that obtained on extruded Ti-6Al-4V, with a basal component perpendicular to the tube axis

Files in this item

Name:
KEM.554-557.157.pdf
Size:
4.165Mb
Format:
PDF
View/Open

Collections

  • Laboratoire Mechanics, Surfaces and Materials Processing (MSMP)

Related items

Showing items related by title, author, creator and subject.

  • On the damage criteria and their critical values for flowforming of ELI grade Ti64 
    Communication avec acte
    MASSONI, Elisabeth; ccDEPRIESTER, Dorian (Trans Tech Publications, 2014)
    Cold flowforming is a chipless forming process that deforms tubular parts by reducing their outer diameter and thickness while increasing their length. It consists of a rotating mandrel and one or more rollers that are ...
  • MTEX2Gmsh: a tool for generating 2D meshes from EBSD data 
    Article dans une revue avec comité de lecture
    ccDEPRIESTER, Dorian; ccKUBLER, Regis (Open Journals, 2020)
    In material sciences applied to crystalline materials, such as metals or ceramics, the grain morphology (size and shape) and the crystallographic texture are of great importance for understanding the macroscopic behaviour ...
  • Grain size estimation in polycrystals: Solving the corpuscle problem using Maximum Likelihood Estimation 
    Article dans une revue avec comité de lecture
    ccDEPRIESTER, Dorian; ccKUBLER, Regis (Elsevier BV, 2021)
    In materials science, the microstructures of materials are generally characterized by 2D observation (e.g. electron microscopy). For polycrystalline materials, such as crystalline rocks or ceramics, those observations can ...
  • Crystal Plasticity simulations of in situ tensile tests: A two-step inverse method for identification of CP parameters, and assessment of CPFEM capabilities 
    Article dans une revue avec comité de lecture
    ccDEPRIESTER, Dorian; ccGOULMY, Jean-Patrick; BARRALLIER, Laurent (Elsevier BV, 2023-09)
    As the computational capability of modern computers increases, the Crystal Plasticity Finite Element Method (CPFEM) becomes more and more popular in materials science to model the mechanical behaviour of polycrystals. ...
  • Mechanical behavior of polycrystals: Coupled in situ DIC-EBSD analysis of pure copper under tensile test 
    Article dans une revue avec comité de lecture
    ccGOULMY, Jean-Patrick; ccDEPRIESTER, Dorian; GUITTONNEAU, F.; ccJÉGOU, Sébastien; BARRALLIER, Laurent (Elsevier BV, 2022-12)
    Understanding the mechanisms at the microstructure scale is of great importance for modeling the behavior of materials at different scales. To this end, digital image correlation (DIC) is an effective measurement method ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales