title: 3D reconstruction of prior β grains in friction stir-processed Ti-6Al-4V.
abstract: The prior β grain structure and orientations in the central stir zone of friction stir-processed Ti-6Al-4V were reconstructed from measured α phase orientations obtained by three-dimensional serial sectioning in a dual-beam focused ion beam scanning electron microscope. The data were processed to obtain the α colony and β grain size distributions in the volume. Several β grains were individually analysed to determine the total number of unique α variants and the respective volume fractions of each. The analysis revealed that some grains experienced overwhelming variant selection (i.e. one variant dominated) whereas other β grains contained a more evenly distributed mixture of all 12 variants.
authors.affiliation: Air Force Research Laboratory, Wright-Patterson AFB, Ohio, U.S.A.
authors.forename: J S
authors.initials: JS
authors.lastname: Tiley
authors.forename: A R
authors.initials: AR
authors.lastname: Shiveley
authors.forename: A L
authors.initials: AL
authors.lastname: Pilchak
authors.forename: P A
authors.initials: PA
authors.lastname: Shade
authors.forename: M A
authors.initials: MA
authors.lastname: Groeber
keywords: 3D reconstruction; EBSD characterization; titanium alloys