SYMPOSIA PAPER Published: 01 January 1979

Super Waspaloy Microstructure and Properties


Waspaloy is currently one of the more widely used alloys for turbine disk applications in the aerospace industry. However, higher engine performance demands by aircraft engine manufacturers have resulted in a number of approaches by material suppliers to upgrade the alloy. These approaches range from simple compositional modifications to a combination of chemistry modifications coupled with thermal mechanical processing. One such approach resulted in what is now commonly referred to as Super Waspaloy.

Tension, low-cycle fatigue, and creep rupture tests of Waspaloy and Super Waspaloy forgings were conducted from room temperature to 1089 K (1500°F), after which material properties were reviewed and correlated with the disk microstructure.

Author Information

Deye, DJ
AiResearch Manufacturing Company of Arizona, Phoenix, Ariz.
Couts, WH
Wyman Gordon Co., North Grafton, Mass.
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Developed by Committee: E04
Pages: 601–615
DOI: 10.1520/STP36892S
ISBN-EB: 978-0-8031-4742-3
ISBN-13: 978-0-8031-0517-1