MAGNETIC AND MECHANICAL-PROPERTIES OF RAPIDLY SOLIDIFIED FE-SI 6.5WT-PERCENT ALLOYS AND THEIR INTERPRETATION

The structural, mechanical and magnetic properties of Fe-Si 6.5 wt% ra pidly solidified alloys have been investigated following recrystalliza tion annealing and different rates of cooling through the B-2 + DO3 or dering region (1 less than or equal to T less than or equal to 1500 de grees C min(-1)). A transition from ductile to brittle behavior is obs erved for T < similar to 1000 degrees C min(-1), chiefly due to B-2 or dering and the associated formation of superlattice dislocations, havi ng reduced glide and cross-slip capability, The magnetic behavior appe ars, however, to be weakly dependent on T, with the energy losses mini mized for average grain size around 100-150 mu m.