Repair of rotating air-sealing components for gas turbine engines

Conference · Fri Oct 31 23:00:00 EST 1975 · Weld. J. (Miami), v. 54, no. 11, pp. 409a-415s

OSTI ID:4131486

Lee, J W

Weld repair was investigated for gas turbine rotating air-sealing components. Results showed that successful knife-edge restoration can be achieved by either the gas tungsten-arc (GTA) or electron beam (EB) process on Ti- 6Al-4V, Ti-8Al-1Mo-1V, and nickel-iron base Incoloy 901 components on a component- by-component basis. Successful flange bolt-hole crack repair can also be made by the GTA process on low alloy steel AMS 6304 components. Particular importance was placed on the low cycle fatigue life of repaired hardware. Knife-edge Ti-6Al- 4V and bolt-hole AMS 6304 fatigue specimens were tested. Welded specimen low cycle fatigue lives comparable to those of the base metal specimens were obtained in both alloys. Also, experimental engine testing was conducted on the following components: (1) knife-edge GTA repaired Ti-6Al-4V and Incoloy 901; (2) knife-edge EB repaired Ti-8Ti-8Al-1Mo-1V; and (3) bolt-hole GTA repaired AMS 6304. Acceptable low cycle fatigue life was attained in each of the weld repaired components. Weld repair procedures have been established and incorporated in applicable engine overhaul manuals for field service use. (auth)

• Research Organization: United Aircraft, East Hartford, CT
• NSA Number: NSA-33-009799
• OSTI ID: 4131486
• Journal Information: Weld. J. (Miami), v. 54, no. 11, pp. 409a-415s, Journal Name: Weld. J. (Miami), v. 54, no. 11, pp. 409a-415s; ISSN WEJUA
• Country of Publication: United States
• Language: English

Related Subjects

*ALUMINIUM ALLOYS-- WELDING
*GAS TURBINES-- REPAIR
*INCOLOY 901-- WELDING
*TITANIUM BASE ALLOYS-- WELDING
*VANADIUM ALLOYS-- WELDING
360101* --Materials--Metals & Alloys--Preparation & Fabrication
MOLYBDENUM ADDITIONS
N50220* --Metals
Ceramics
& Other Materials--Metals & Alloys--Preparation & Fabrication