Intragranular residual stress evaluation using the semi-destructive FIB-DIC ring-core drilling method

Alexander J.G. Lunt, Alexander M. Korsunsky

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)
30 Downloads (Pure)

Abstract

Titanium aluminide (TiAl) is a lightweight intermetallic compound with a range of exceptional mid-to-high temperature mechanical properties. These characteristics have the potential to deliver significant weight savings in aero engine components. However, the relatively low ductility of TiAl requires improved understanding of the relationship between manufacturing processes and residual stresses in order to expand the use of such components in service. Previous studies have suggested that stress determination at high spatial resolution is necessary to achieve better insight. The present paper reports progress beyond the current state-of-the-art towards the identification of the near-surface intragranular residual stress state in cast and ground TiAl at a resolution better than 5 μm. The semi-destructive ring-core drilling method using Focused Ion Beam (FIB) and Digital Image Correlation (DIC) was used for in-plane residual stress estimation in ten grains at the sample surface. The nature of the locally observed strain reliefs suggests that tensile residual stresses may have been induced in some grains by the unidirectional grinding process applied to the surface.

Original languageEnglish
Title of host publicationResidual Stresses IX
PublisherTrans Tech Publications
Pages8-13
Number of pages6
ISBN (Print)9783038351535
DOIs
Publication statusPublished - 1 Jan 2014
Event9th European Conference on Residual Stresses, ECRS 2014 - Troyes, France
Duration: 7 Jul 201410 Jul 2014

Publication series

NameAdvanced Materials Research
Volume996
ISSN (Print)1022-6680
ISSN (Electronic)1662-8985

Conference

Conference9th European Conference on Residual Stresses, ECRS 2014
CountryFrance
CityTroyes
Period7/07/1410/07/14

Keywords

  • DIC
  • FIB
  • Intragranular
  • Residual stresses
  • SEM
  • TiAl

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Lunt, A. J. G., & Korsunsky, A. M. (2014). Intragranular residual stress evaluation using the semi-destructive FIB-DIC ring-core drilling method. In Residual Stresses IX (pp. 8-13). (Advanced Materials Research; Vol. 996). Trans Tech Publications. https://doi.org/10.4028/www.scientific.net/AMR.996.8