On the mechanism of superelasticity in Gum metal Original Research Article

The deformation mechanisms of the image-Ti alloy, Gum metal, were investigated with the aid of in situ synchrotron X-ray diffraction (SXRD) and transmission electron microscopy (TEM). SXRD showed that Gum metal undergoes a reversible stress-induced martensitic (image) phase transformation. Oxygen increases the resistance to shear by increasing image and limits the extent of image growth. Prior deformation aids image formation of by providing nuclei, such as image1 1 2}image1 1 1image twins and stress-induced image plates. The formation of twins and image plates, both observed in TEM, are believed to be a result of a low image in this alloy. Features similar to the “giant faults” seen previously were observed in TEM; their formation is believed to be a result of image1 1 2}image1 1 1image shear.