Applied High Temperature Technology Program. Volume I.
Final technical rept. 1 Jun 71-31 Jan 75,
PRATT AND WHITNEY AIRCRAFT EAST HARTFORD CONN
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The initial effort consisted of the development of aircooled columbium and thoria dispersed TD cobalt vanes for installation in an advanced development engine. The redirected effort, covered in the report, continued this development by further characterizing the poor fatigue behavior of the coated SU-31 columbium alloy and substituting a directionally solidified eutectic alloy for the TD cobalt material. The gammagammadelta D.S. eutectic alloy was chosen for this program. A technology base for design of gammagammadelta D.S. eutectic hardware is presented. This includes casting, coating, joining, hole drilling, and material property evaluation. Material laboratory tests are described and data presented. Applications to aircooled turbine hardware is discussed.
- Metallurgy and Metallography
- Jet and Gas Turbine Engines