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Gas Turbine Engine Project Materials Joint Test Protocol

The document was principally prepared by Jerry Schell from GE Aircraft Engines, with additional input from GTE OEMs and DoD Repair Depots. It outlines the technical evaluation of seven component alloys and coating compositions to be investigated in the project using HVOF and Plasma Spray processes. The Joint Test Protocol includes five major tasks such as process optimizations, fatigue, wear, friction, corrosion tests, and producibility tests. The current status of the project includes finalizing the document, acquiring raw materials, and issuing purchase orders for fabrication and coatings optimization works.

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Gas Turbine Engine Project Materials Joint Test Protocol

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  1. Gas Turbine Engine ProjectMaterials Joint Test Protocol Document Principally Prepared By Jerry Schell GE Aircraft Engines Additional Input From GTE OEMs and DoD Repair Depots

  2. Component Alloys Seven alloys selected for technical evaluation IN718, INC901, AM355, A286, 17-4PH, 4340, 9310

  3. Coating Compositions to beInvestigated in Project HVOF ProcessAir Plasma Spray Process WC/17Co WC/17Co Cr3C2/(20)NiCr Co/28Mo/8Cr/2Si* Co/28Mo/8Cr/2Si* Co/28Mo/17Cr/3Si** * Tribaloy 400 ** Tribaloy 800

  4. Materials JTP Structure FIVE MAJOR TASKS: 1. Spray process optimizations 2. Fatigue 3. Wear and friction Fretting tests, carbon seal tests 4. Corrosion tests 5. Producibility tests - Stripability - Assembly/Disassembly

  5. Current Status of Materials JTP • Document finalized and being distributed for signatures • Acquisition of all raw materials completed and delivered to Metcut Research in Cincinnati • PO issued for fabrication of 1300 fatigue coupons; work in progress • PO issued to Hitemco on Long Island for coatings optimization work; Jerry Schell coordinating effort on HVOF Tribaloy 800 and Cr3C 2/NiCr, and Plasma Spray WC/Co and Tribaloy 400; first series of tests conducted in August 2001 • Overall schedule established for phased execution of sample preparation, coating, and testing

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