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.

• Periodical: Advanced Materials Research (Volumes 97-101)
• Pages: 1693-1696
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.97-101.1693
• Online since: March 2010
• Authors: Li Ma, Hai Bo Wang, Zhao Hui Hu
• Keywords: EB-PVD, Laminated Composite, Ti/TiAl

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