MARTENSITIC-TRANSFORMATION IN RAPIDLY SOLIDIFIED TI-PD-NI

The rapidly solidified Ti-Pd-Ni were made by the melt spinning method and the ribbon shaped specimens were obtained. The dimensions of these specimens were 30 mu m in thickness and 2 mm in width. The surface st ructure along the direction of the length of specimens was observed by optical microscope and scanning electron microscope. By the results o f X-ray and electron diffraction, it was confirmed that these specimen s had good crystallinity and preferred orientation. These specimens we re transformed from the martensite phase (B19) to the parent phase (B2 ) by heating and from B2 to B19 by cooling. The transformation feature s and crystal structures were same as those of the specimen made by th e ordinary method. The transformation temperatures decreased by rapid solidification.