Behavior of the coercive field and the initial susceptibility during recovery of plastically deformed Fe-3.25- percent Si alloy

Coercive field Hcand initial susceptibility of plastically deformed specimens of Fe-3.25-percent Si alloy are measured during isochronal and isothermal recovery at various temperatures. The isochronal behavior was studied between 100 and 800°C at intervals of 50° and the specimen annealed for 20 min at each temperature. The coercive field and the initial susceptibility remain constant up to about 200°C. Above this temperature Hcincreases to a maximum and then drops steadily below its original value with rising temperature, drops to a minimum with rising temperature and then steadily increases to above its initial value. The isothermal behavior shows that Hcincreases with recovery time at lower temperatures and then drops to lower values with annealing time. At higher temperatures the coercive field decreases with annealing time without exhibiting a maximum. The initial susceptibility drops to a minimum during the early stage of isothermal recovery at lower temperatures and subsequently rises to higher values. At higher temperature no drop is observed in .