Dislocation Driven Chromium Precipitation in Fe-9Cr Binary Alloy: A Positron Lifetime Study

Abstract

The influence of initial heat treatment on anomalous Cr precipitation within high temperature solubility region in Fe-9Cr alloy has been investigated using positron lifetime studies. Air-quenched samples with pre-existing dislocations exhibited a distinct annealing stage in positron lifetime between 800 and 1100 K corresponding to Cr-precipitation. During this stage, Transmission Electron Microscopy showed fine precipitates of average size 4 nm, dispersed throughout the sample and from EDS analysis they are found to be Cr-enriched. The existence of dislocations is found to be responsible for Cr precipitation.

Revised version Submitted to Phys. Rev. B

References in corpus (3)

• Modeling the momentum distributions of annihilating electron-positron pairs in solids
• A new neutron study of the short range order inversion in Fe${}_{1-x}$Cr${}_x$
• MIKA: a multigrid-based program package for electronic structure calculations

Cited by in corpus (2)

• A Multi-Component Phase Field Crystal Model for Structural Transformations in Metal Alloys
• Co-evolution of point defects and Cr-rich nano-phase in binary Fe-20 at.% Cr alloy: A comprehensive investigation using positron annihilation spectroscopy and atom probe tomography