NASA Technical Reports Server (NTRS) : High pdf

NASA Technical Reports Server (NTRS) : High

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Comparative spin tests were run on superalloy disks at an elevated temperature to determine the benefits of a DMHT disk, with a fine grain bore and coarse grain rim, versus a traditional subsolvus disk with a fine grain structure in the bore and rim. The results of these tests showed that the DMHT disk exhibited significantly lower growth at 1500 F. Further, the results of these tests could be accurately predicted using a 2D viscoelastic finite element analysis. These results indicate DMHT technology can be used to extend disk operating temperatures when compared to traditional subsolvus heat treatment options for superalloy disks. However, additional research is required to ensure the safe operation of a DMHT disk under more realistic engine operating conditions. This includes testing to determine the burst margin and cyclic capability of DMHT disks in a spin pit, at a minimum, and ultimately running an engine test with a DMHT disk

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 6/1/2002
• Year: 2002
• Book Topics/Themes: NASA Technical Reports Server (NTRS), HEAT RESISTANT ALLOYS, SPIN TESTS, HEAT TREATMENT, MICROSTRUCTURE, GRAIN SIZE, ENGINE TESTS, FINITE ELEMENT METHOD, VISCOELASTICITY, TEMPERATURE DISTRIBUTION, DISKS (SHAPES), Gayda, John, Kantzos, Pete

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