STP612

    Thermal-Stress Fatigue Behavior of Twenty-Six Superalloys

    Published: Jan 1976


      Format Pages Price  
    PDF Version (376K) 17 $25   ADD TO CART
    Complete Source PDF (4.5M) 17 $83   ADD TO CART


    Abstract

    The comparative thermal-stress fatigue resistances of 26 nickel- and cobalt-base alloys were determined by fluidized bed tests. Cycles to cracking differed by almost three orders of magnitude for these materials, with directional solidification and surface protection showing definite benefit. The alloy-coating combination with the highest thermal-stress fatigue resistance was directionally solidified NASA TAZ-8A with an RT-XP coating. Its oxidation resistance was also excellent, showing approximately a ½ percent weight loss after 14 000 fluidized bed cycles.

    Keywords:

    thermal fatigue, thermal stress, oxidation, coatings, nickel alloys, cobalt alloys, fluidized bed, heat resistant alloys, mechanical properties


    Author Information:

    Bizon, PT
    Materials engineer and fatigue branch consultant, National Aeronautics and Space Administration Lewis Research Center, Cleveland, Ohio

    Spera, DA
    Materials engineer and fatigue branch consultant, National Aeronautics and Space Administration Lewis Research Center, Cleveland, Ohio


    Paper ID: STP27887S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP27887S


    CrossRef ASTM International is a member of CrossRef.