Pather, R and Mitten, W. A. and Holdway, P and Ubhi, H.S. and Wisbey, A and Brooks, Jeffery (2003) The effect of high temperature exposure on the tensile properties of TiAl alloys. Intermetallics, 11 (10). pp. 1015-1027. ISSN 0966-9795Full text not available in this repository. (Request a copy from the Strathclyde author)
The lightweight γ titanium aluminide alloys offer good mechanical properties for gas turbine applications at temperatures up to 700 °C. An important characteristic of these materials will be their mechanical performance after exposure to anticipated service temperatures. Thus cast Ti-46Al-2W and extruded Ti-46Al-5Nb-1W have been subjected to thermal exposure at temperatures between 500 and 700 °C for up to 1000 h. This showed that the bulk microstructure was stable and resulted in little or no change in tensile properties after exposure. However, once surface effects were included in the tensile properties, then the values of both room temperature tensile strength and ductility reduced significantly. The room temperature property reductions were thought to be associated with changes in the surface residual stress state. Other potential factors include premature surface cracking, due to either localised hydrogen or oxygen embrittlement.
|Keywords:||titanium aluminides , thermal stability, Environmental embrittlement , Engineering design, Materials Chemistry, Mechanics of Materials, Metals and Alloys, Chemistry(all), Mechanical Engineering|
|Subjects:||Technology > Engineering (General). Civil engineering (General) > Engineering design|
|Department:||Faculty of Engineering > Design, Manufacture and Engineering Management|
|Depositing user:||Pure Administrator|
|Date Deposited:||15 Jun 2011 13:52|
|Last modified:||27 May 2016 03:42|