Navy product-improvement program for Turbomach T-62t APU's corrosion-resistant turbine wheel/improved bearing and lubrication system. Final report, 19 January 1983-12 April 1986
Technical Report
·
OSTI ID:6423691
Titan T-27 and T-40-1 gas turbine engines have used IN-713 LC turbine wheels for many years without serious hot-corrosion problems. For extended operation in marine environments, however, the well-known susceptibility of Alloy 713 to hot corrosion (sulfidation) could lead to deterioration of airfoil surfaces resulting eventually in loss of engine performance, or even engine failure. Corrosion protection could be enhanced by protective coatings; however, with base material so poor in hot-corrosion resistance as Alloy 713, the reliability of a 713 turbine wheel would be suspect. Also, degradation of mechanical properties accompanying the coating process would reduce the safety margin below acceptable, and appears to justifya material change to an alloy with better hot-corrosion resistance. The alloy selected was MAR-M247, a nickel-based alloy with 10% cobalt, 10% tungsten, 8,25% chromium, 5.5% aluminum, 3% tantalum, 1.5% hafnium, 1% titanium, and other elements. The expected improvements over IN-713 LC include improved oxidation/hot corrosion resistance, blade creep resistance, and tensile strength.
- Research Organization:
- Sundstrand Turbomach, San Diego, CA (USA)
- OSTI ID:
- 6423691
- Report Number(s):
- AD-A-178084/0/XAB; ERR-0632
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rainbow test of advanced coatings for gas turbine blades and vanes
Development of a weld repair for airfoils of Mar-M247 material
Experience with IN 939 as a hot corrosion resistant turbine vane material
Technical Report
·
Mon Aug 01 00:00:00 EDT 1988
·
OSTI ID:6943552
Development of a weld repair for airfoils of Mar-M247 material
Conference
·
Fri Dec 30 23:00:00 EST 1994
·
OSTI ID:86010
Experience with IN 939 as a hot corrosion resistant turbine vane material
Conference
·
Fri Jun 01 00:00:00 EDT 1984
· Am. Soc. Mech. Eng., (Pap.); (United States)
·
OSTI ID:6567756
Related Subjects
33 ADVANCED PROPULSION SYSTEMS
330103 -- Internal Combustion Engines-- Turbine
36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
AIRFOILS
ALLOY-MAR-M246
ALLOYS
ALUMINIUM ALLOYS
CHROMIUM
CHROMIUM ALLOYS
COATINGS
COBALT
COBALT ALLOYS
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
ELEMENTS
ENGINES
GAS TURBINE ENGINES
HEAT ENGINES
HIGH TEMPERATURE
INTERNAL COMBUSTION ENGINES
LOSSES
LUBRICATION
MECHANICAL PROPERTIES
METALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
OPERATION
PROTECTIVE COATINGS
RELIABILITY
SAFETY
TANTALUM
TANTALUM ALLOYS
TITANIUM
TITANIUM ALLOYS
TRANSITION ELEMENTS
TUNGSTEN
TUNGSTEN ALLOYS
330103 -- Internal Combustion Engines-- Turbine
36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
AIRFOILS
ALLOY-MAR-M246
ALLOYS
ALUMINIUM ALLOYS
CHROMIUM
CHROMIUM ALLOYS
COATINGS
COBALT
COBALT ALLOYS
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
ELEMENTS
ENGINES
GAS TURBINE ENGINES
HEAT ENGINES
HIGH TEMPERATURE
INTERNAL COMBUSTION ENGINES
LOSSES
LUBRICATION
MECHANICAL PROPERTIES
METALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
OPERATION
PROTECTIVE COATINGS
RELIABILITY
SAFETY
TANTALUM
TANTALUM ALLOYS
TITANIUM
TITANIUM ALLOYS
TRANSITION ELEMENTS
TUNGSTEN
TUNGSTEN ALLOYS