Domestic object damage and fatigue behaviour of an advanced gamma TiAl alloy

Laboratory simulated domestic object damage (DOD) was imposed on aerofoil style specimens manufactured from a latest generation gamma titanium aluminide. The form of the impact sites was characterised in detail before assessment under fatigue loading at room temperature and 650°C. A reduction in fatigue strength due to the presence of DOD was shown to be sensitive to the projectile impact energy but independent of test temperature. Instantaneous fracture from high-speed impacts is reported.


M.R. Bache, C.C. Morgans

Intermetallics, Volume 19, Issue 6, June 2011, Pages 782–786, 3rd IRC International Workshop 13-14 May 2010, doi:10.1016/j.intermet.2010.11.018