Optimization of residual stress of Ti-6Al-4V for Liquid Impingement Erosion Mitigation

The recent work done in collaboration with the group of prof. Bocher on water erosion mechanisms at ETS showed that the erosion in titanium Ti64 alloy compressor blades is based on crack initiation and propagation. These phenomena are dependent on material microstructure, as well as on the stress level. Ti64 alloys can have various types of microstructures and textures. Therefore, a better understanding of the impact of the microstructure and texture is required in order to define the optimum material condition. There are also various surface treatments allowing for introduction of compressive stress on the surface and subsurface region to decrease erosion rates. The residual stress field introduced to mitigate erosion needs to be designed as a function of stress field due to the high speed water impact. This will be achieved through the modeling of the high speed impact and resultant stress distribution.

Faculty Supervisor:

Philippe Bocher

Student:

Alexandre Gariépy & TBD

Partner:

Rolls Royce Canada Limited

Discipline:

Engineering - mechanical

Sector:

Automotive and transportation

University:

École de technologie supérieure