Titanium L-1 steam turbine blade retrofit. Final report. [Ti-6Al-4V]
Technical Report
·
OSTI ID:5760732
The purpose of this project is to investigate the feasibility of titanium as a steam turbine blading alloy, particularly for application to the transition zone where corrosion-assisted blade failures have been a problem. This investigation includes both mechanical feasibility as well as the relative corrosion resistance. As part of the program a row of titanium blades, as well as a nearly identical row of steel blades, have been designed, manufactured and installed in an operating turbine, which has previously experienced corrosion-assisted blade distress. The steel blades provide a basis by which to judge the effect of the material change on blade stress and reliability. The relative responses of both steel and titanium blades under actual service conditions have been measured in a field telemetry test. The results of the field telemetry test do not indicate a higher stress response level for the titanium blade or any abnormal response due to the lower material damping. The titanium blade meets all requirements and, consequently, titanium has been qualified as a steam turbine blading alloy. The relative corrosion resistance of titanium in this environment will be determined by the long term blade reliability under operating conditions. 7 refs., 31 figs., 10 tabs.
- Research Organization:
- Westinghouse Electric Corp., Orlando, FL (USA). Power Generation Operating Div.
- OSTI ID:
- 5760732
- Report Number(s):
- EPRI-CS-4515; ON: TI86920271
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
200104 -- Fossil-Fueled Power Plants-- Components
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM ALLOYS
COMMUNICATIONS
CORROSION RESISTANCE
DATA
DATA TRANSMISSION
EXPERIMENTAL DATA
FATIGUE
FEASIBILITY STUDIES
HIGH TEMPERATURE
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
LOW TEMPERATURE
MACHINERY
MATERIALS TESTING
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
NUMERICAL DATA
RETROFITTING
STEAM TURBINES
STEELS
STRESSES
TELEMETRY
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TESTING
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
TURBINE BLADES
TURBINES
TURBOMACHINERY
VANADIUM ALLOYS
YIELD STRENGTH
200104 -- Fossil-Fueled Power Plants-- Components
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM ALLOYS
COMMUNICATIONS
CORROSION RESISTANCE
DATA
DATA TRANSMISSION
EXPERIMENTAL DATA
FATIGUE
FEASIBILITY STUDIES
HIGH TEMPERATURE
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
LOW TEMPERATURE
MACHINERY
MATERIALS TESTING
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
NUMERICAL DATA
RETROFITTING
STEAM TURBINES
STEELS
STRESSES
TELEMETRY
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TESTING
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
TURBINE BLADES
TURBINES
TURBOMACHINERY
VANADIUM ALLOYS
YIELD STRENGTH