Turbomachine aerofoil and a method of production

Details Turbomachine aerofoil and a method of production Turbomachine aerofoil and a method of production

1996-10-22

1998-06-09

Sheehan, John

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148557, C22F 118

Patent

active

057627312

ABSTRACT:
A cast and hot isostatically pressed gamma titanium aluminide turbine blade (26) has an aerofoil portion (38) including a concave pressure surface (44) and a convex suction surface (46). The concave pressure surface (44) has surface irregularities (48), produced by the action of the hot isostatic pressing process on voids (56) located within the cast turbine blade (26), located in that region (50) of the concave pressure surface (44) where in operation aerodynamic separation (G) occurs to minimise the aerodynamic effects of the surface irregularities (48) upon the operation of the turbine blade (26). The remaining portion of the concave pressure surface (44) and the whole of the convex suction surface (46) are substantially free of surface irregularities (48).

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