6533b82dfe1ef96bd1291ba8
RESEARCH PRODUCT
Shear banding mechanism of plastic deformation in LiF irradiated with swift heavy ions
I. ManikaR. ZabelsJānis Manikssubject
Dislocation creepMaterials sciencePhysics::Instrumentation and DetectorsPhysics::Medical PhysicsSlip (materials science)NanoindentationFluenceCondensed Matter::Materials ScienceIndentationForensic engineeringIrradiationDislocationComposite materialDeformation (engineering)description
The effect of ion irradiation on the behavior of plastic deformation at micro- and nanoindentation on (001) face of LiF has been investigated. The irradiation was performed using heavy ions (U, Au, Ti and S) with energy in the range from 3 MeV to 2 GeV at fluences up to 5x1013 ions/cm2. In non-irradiated LiF, the indentation produces dislocation gliding on the {110} planes along the and directions. At high fluence irradiation, the resource of the dislocation slip along the preferable directions becomes exhausted due to immobilization of dislocations by radiation defects and their aggregates. The present study demonstrates the change of the mechanism of plastic deformation from homogenous dislocation slip to localized shear banding in samples irradiated to high fluences. The factors facilitating of the localization of deformation have been analyzed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-08-20 | IOP Conference Series: Materials Science and Engineering |