Nano/sub-micron crystallization of Fe–Co–7.15V alloy by thermo-mechanical process to improve magnetic properties

Correlation Between Magnetic Properties and Allotropic Phase Transition of Fe–Co–V Alloy

“…2. It is observed that the retained c phase is diminished after cold rolling and that the microstructure becomes fully a-bcc phase, which is in good agreement with the previous publications [1,2,[14][15][16].…”

“…FeCo-(7-13) wt% V alloys constitute an important group of magnetic alloys which are extensively used for manufacture of synchronous hysteresis motors (SHMs) [1][2][3][4]. Magnetic properties of these alloys can vary within a wide range of magnetically soft to hard behavior, depending on the applied thermomechanical processing conditions [1,2].…”

“…Magnetic properties of these alloys can vary within a wide range of magnetically soft to hard behavior, depending on the applied thermomechanical processing conditions [1,2].…”

“…It is generally accepted that the magnetic properties of FeCo-V alloys are affected by the formation of non-magnetic phases in their microstructure during the annealing process [1,2]. Previous studies show that the non-magnetic phases in these alloys may form through the polymorphic a ?…”

“…It is known that the temperature of the polymorphic a ? c transformation in a FeCo alloy with 50 at.% Co lies above 900°C [5][6][7], while V addition decreases this temperature [7], so that at higher vanadium concentrations (above *7 wt% V) formation of retained austenite (c) is expected after quenching to ambient temperature [1].…”