A Novel Testing Methodology for In Situ Microstructural Characterisation During Continuous Strain Path Change

Sisir Dhara*, Scott Taylor, Łukasz Figiel, Darren Hughes, Barbara Shollock, Sumit Hazra

*Corresponding author for this work

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

1 Citation (Scopus)

Abstract

Change of strain path is a familiar phenomenon during continuous stamping operations of sheet metal for several applications, including automotive body parts. Strain path transition can potentially alter the forming limit of the material. Controlling the strain path change in a single deformation stage is a key challenge in elucidating this strain path-dependent deformation. In this work, a novel testing rig and specimen geometry that is capable of changing the strain path of a sample continuously without unloading the specimen were conceptualised, modelled, and subsequently manufactured. The size of this mechanical test rig permits it to be placed inside a scanning electron microscope (SEM) chamber in order to study strain path transition in situ to highlight strain localisation and related microstructural changes in real time. Using this apparatus, the effect of strain path change on material microstructure was investigated by carrying out in situ SEM and electron back-scattered diffraction (EBSD) analysis.

Original languageEnglish
Title of host publicationNUMISHEET 2022 - Proceedings of the 12th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes
EditorsKaan Inal, Michael Worswick, Cliff Butcher, Julie Levesque
PublisherSpringer Science and Business Media Deutschland GmbH
Pages287-300
Number of pages14
ISBN (Print)9783031062117
DOIs
Publication statusPublished - 2022
Event12th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, NUMISHEET 2022 - Toronto, Canada
Duration: 10 Jul 202214 Jul 2022

Publication series

NameMinerals, Metals and Materials Series
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Conference

Conference12th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, NUMISHEET 2022
Country/TerritoryCanada
CityToronto
Period10/07/202214/07/2022

Keywords

  • Finite element modelling
  • In situ SEM and EBSD
  • Microstructure characterisation
  • Strain path change

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