Tensile Behavior and Fractography of Ti-TiAl Multi-Layered Foil Prepared by Electron Beam Physical Vapor Deposition Technology
Ti-TiAl multi-layered materials have been prepared by electron beam physical vapor deposition technique. The tensile behavior of samples at room temperature and high temperature was tested, and then the deformation mechanism at different temperature was analyzed according to the fracture surface. The results show that the tensile curves hot-pressed samples have a broad step during the plastic deformation process, and the breaking strain of the sample has been increased for a wide-range. The presence of Ti layers have led to the cracks stagger along the inter-laminar interface or the layer due to which micro laminate expresses a good characteristic of delayed fracture. With the increase of temperature, the bulk modulus and yield strength of multi-layered Ti-TiAl have been increased abnormally due to the anomalous yield strengthening behavior of TiAl intermetallic.
Z. H. Hu et al., "Tensile Behavior and Fractography of Ti-TiAl Multi-Layered Foil Prepared by Electron Beam Physical Vapor Deposition Technology", Applied Mechanics and Materials, Vols. 55-57, pp. 183-187, 2011