Polychromatic Microdiffraction Characterization of Defect Gradients in Severely-Deformed Materials

Journal Article · Wed Dec 31 23:00:00 EST 2008 · Micron

DOI:https://doi.org/10.1016/j.micron.2008.03.010· OSTI ID:941033

Barabash, Rozaliya ^[1]; Ice, Gene E ^[1]; Liu, Wenjun ^[1]; Barabash, Oleg M ^[1]

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1. ORNL

This paper analyses local lattice rotations introduced in severely-deformed polycrystalline titanium by friction-stir welding. Nondestructive three-dimensional (3D) spatially-resolved polychromatic X-ray microdiffraction, is used to resolve the local crystal structure of the restructured surface from neighboring local structures in the sample material. The measurements reveal strong gradients of strain and geometrically-necessary dislocations near the surface and illustrate the potential of polychromatic microdiffraction for the study of deformation in complex materials systems.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 941033
• Journal Information: Micron, Journal Name: Micron Journal Issue: 1 Vol. 40; ISSN 0047-7206; ISSN MICOB5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL STRUCTURE
DEFECTS
DEFORMATION
DISLOCATIONS
STRAINS
TITANIUM
WELDING
X-ray microdiffraction
friction stir welding
three-dimensional microscopy