In situ AC-hysteresis measurements of SPD-processed Cu20(Fe15Co85)80

TL;DR

This study investigates how heat treatment affects the magnetic properties of a metastable Cu-Fe-Co alloy processed by severe plastic deformation, using in-situ AC-hysteresis measurements and microstructural analysis.

Contribution

It provides new insights into the stability and magnetic behavior of SPD-processed Cu-Fe-Co alloys during annealing, combining in-situ magnetic measurements with microstructural investigations.

Findings

Single-phase solid solution stable up to 400°C

Hindered domain wall motion at 400°C

Multi-phase microstructure at 600°C increases coercivity

Abstract

The changes of magnetic properties upon heat treatment of a metastable supersaturated solid solution processed by severe plastic deformation are investigated by in-situ AC-hysteresis measurements. Data are analyzed in the framework of dynamic loss theory, with correlative investigations of the microstructural properties. The evolution of hysteresis upon annealing points out that the single-phase supersaturated solid solution remains stable up to 400{\deg}C, then hindering of domain wall motion sets in at this temperature. At 600{\deg}C, a multi phase microstructure is present, causing a significant increase in coercivity.