Sigma-phase in Fe-Cr and Fe-V alloy systems and its physical properties

TL;DR

This review summarizes experimental and theoretical insights into the physical properties of sigma-phase in Fe-Cr and Fe-V alloys, including structural, magnetic, and vibrational characteristics, primarily using Mossbauer spectroscopy.

Contribution

It compiles and discusses recent experimental and theoretical findings on sigma-phase properties in Fe-Cr and Fe-V systems, highlighting structural, magnetic, and vibrational aspects.

Findings

Identification of sigma-phase and its structural properties

Insights into phase transformation kinetics

Measurements of magnetic and vibrational properties

Abstract

A review is presented on physical properties of the sigma-phase in Fe-Cr and Fe-V alloy systems as revealed both with experimental -- mostly with the Mossbauer spectroscopy -- and theoretical methods. In particular, the following questions relevant to the issue have been addressed: identification of sigma and determination of its structural properties, kinetics of alpha-to-sigma and sigma-to-alpha phase transformations, Debye temperature and Fe-partial phonon density of states, Curie temperature and magnetization, hyperfine fields, isomer shifts and electric field gradients.