Characteristics of thermoelastic martensitic transformation in ferromagnetic Fe-Co-Ni-Ti alloys alloyed with Cu

The effect of alloying of Fe-Ni-Co-Ti compositions with copper on their structure and some magnetic characteristics is studied. The investigations performed showed that the alloys under study exhibit a tendency to cellular decomposition at T >= 550 degrees C; at T <= 500 degrees C, the continuous precipitation of an intermetallic phase is mainly observed. The temperature and field dependences of the magnetization of martensite in the Fe-Ni-Co-Ti alloys have been measured; the width of the temperature hysteresis of the martensitic transformation in aged alloys has been determined.