Title of article
Interaction processes between dislocations and particles in the ODS nickel-base superalloy INCONEL MA 754 studied by means of in situ straining in an HVEM
Author/Authors
Hنussler، نويسنده , , D. and Reppich، نويسنده , , B. and Bartsch، نويسنده , , M. and Messerschmidt، نويسنده , , U.، نويسنده ,
Pages
5
From page
500
To page
504
Abstract
In situ straining experiments in a high-voltage electron microscope (HVEM) have been performed on the oxide-dispersion strengthened (ODS) nickel-base superalloy INCONEL MA 754 at 1020 and 1065 K. The results can be interpreted by interfacial pinning of dislocations at the dispersoids and, in some cases, by the Orowan mechanism. In addition to the thermally activated detachment of dislocations from particles, a viscous friction mechanism possibly due to point defect diffusion in the dislocation cores and Taylor hardening contribute to the flow stress.
Keywords
Plastic deformation , Oxide dispersion strengthening , Electron microscopy , dislocation dynamics
Journal title
Astroparticle Physics
Record number
2059038
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