Microstructures of Fe-Pd Alloy Ribbons Subjected to Rapidly Solidified Melt Spinning

Microstructures of the Fe-29.6at%Pd alloy ribbons were observed with an X-ray diffractometer and a transmission electron microscope. The X-ray diffraction profiles at room temperature showed that the ribbon consists of FCT martensitic phase and FCC parent phase. Moreover, the ribbon exhibits a strongly 200-oriented texture analyzing with pole figure measurements. TEM bright field images for the cross section of the ribbon showed high-density twins in the FCT martensite. Twin-related two sets of reflections were observed in the SAED patterns taken of the FCT martensite variants. < 200 >(FCT), was nearly parallel to the thickness direction according to the analysis of the SAED patterns. This result corresponds to the pole figure measurements.