Grain-resolved analysis of localized deformation in nickel-titanium wire under tensile load

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 3D x-ray diffraction method at ESRF Grenoble (ID11 beamline) was applied to investigate grain resolved internal stress and strain around the martensite band front propagating in 0.1mm thin superelastic NiTi wire deformed in tension, We reconstructed internal stress and strain fields around the front and performed simulation by finite element implements SMA model. In this way we managed to solve the mesoscopic mechanism of localized deformation in NiTi.

3D-XRD method was used to evaluate grain microstructure and grain resolved stresses
Description

The 3D-XRD method was used to evaluate grain microstructure and grain resolved stresses within martensite band front propagating in polycrystalline NiTi wire exposed to external stress.

Contact person: Petr Šittner, +420 266 052 657, sittner [at] fzu [dot] cz

Cooperating institutions:

  • Institute of Thermomechanics, CAS
  • ESRF Grenoble
  • FJFI ĆVUT