Synthesis and Mechanical Property Evaluation of Ti-TiAl Metal-Intermetallic Microlaminate Composite

Abstract

A microlaminate consisting of Ti and α2-Ti3Al+γ-TiAl has been synthesized using electron beam physical vapor deposition technique. The microstructure and various properties have been explored. It is demonstrated that the nano-hardness and elastic modulus of Ti layer and Ti-Al layer are of gradient distribution according to the distance to the interface layer which may be results from the pile-up effect and the stress concentration at interface. The presence of Ti layers will lead to the cracks stagger along the inter-laminar interface or the layer due to which micro laminate expresses a good characteristic of delayed fracture. The toughening mechanisms are that the crack deflection and micro-bridge connection caused by the toughening layers increases crack propagation resistance.

Effects of SiC Nanoparticles on the Properties of Titanium-Matrix Foams Processed by Powder Metallurgy

“…Oxide reinforcement particles such as Al 3 O 2 and R 2 O 3 (with R = rare element) have been used by Liu et al [17] and Hieda et al [18], respectively. Moreover, the effects of intermetallic compounds additions such as TiAl and Ti 5 Si 3 particles have been investigated by Ma et al [19] and Sumida and Kondoh [20].…”