Customer Challenge
High Pressure NGV of an aero engine had exhibited cracks on its land and at the adjacent seal slots. This occurrence required a weld repair process to be developed in order to restore component to its original design intent. The repair process had to address below challenges:
- Acceptable welding achievement at Thermal Barrier Coating (TBC) region of damage
- Achievement of acceptable material properties due to change in microstructure at weld region
- Evade possibility of weld failure
Scope
- Create repair solution, support customer approval process and publish manuals
Solution
- Repair solution for validation trials
- Weld parameters
- Final repair process and control parameters for buy-off by customer specialists
- Engine Manuals with approved procedures
Benefits
- Trial welding on sample blade to prove repair process
- Engineering Analysis to justify acceptability of absence of TBC at weld region
- Trial blade lab tested for micro structure
Features
- Trial welding on sample blade to prove repair process
- Engineering Analysis to justify acceptability of absence of TBC at weld region
- Trial blade lab tested for micro structure.
Results
- An usual alternative repair method of Wide Gap Brazing would have resulted in phenomenal increase in repair cost
Talk to our Leaders
Andrew Lewis
Global Business Head
Murali Mohan B
Vertical Solution Partner