Room temperature burst testing of an advanced nickel-base superalloy disk with a dual grain structure was conducted. The disk had a fine grain bore and a coarse grain rim. The results of this test showed that the disk burst at 39 100 rpm in line with predictions based on a 2–D finite element analysis. Further, significant growth of the disk was observed before failure which was also in line with predictions.

SOURCE: Gayda, John and Pete Kantzos. Burst Testing of a Superalloy Disk With a Dual Grain Structure. NASA Glenn Research Center. NASA/TM-2002-211868 (August 2002.)

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