Mechanical surface treatment
Improving mechanical properties through compressive residual stresses
Dimensional control and performance specifications for metallic parts are increasingly strict meaning that processes, such as shot peening, need to be continuously improved. These processes must also be adapted to newly developed alloys.
Through the study and understanding of surface strengthening and damage mechanisms, including numerical simulation of residual stresses, IRT M2P improves existing processes and helps develop new ones. Experienced in the aerospace, automotive, marine and other sectors, IRT M2P deploys its industrial-scale equipment and know-how in the field of shot peening and mechanical surface treatments.
Expertise & Services
Mechanical surface strengthening
- Access to a flexible platform equipped with various sensors
- New shot development
- Process development and optimization
- R&D and industrial support for shot peening
- Adaptation of shot peening parameters with respect to product specifications
- Assistance with integrating shot peening with other processes
- Robot trajectory programming and evaluation of effective zone
Process supervision
- Automotive and aerospace standards
- Precise determination of Almen intensity and covering ratio
- Pressure and mass flow monitoring
- Shot speed monitoring by Shotmeter®
Process simulation and modelling
- Part design including shot peening
- Predict residual stresses under solicitation
- Parametric studies and model definition
- Process simulation using a multi-shot model: projectile speed, angle, shot size, covering ratio, material characteristics
Analysis & Characterization
- Surface integrity
- Residual stresses analysis
- Mechanical properties
- Microhardness profile
Technology
Shot peening process by:
Nozzles: Precise and controlled application including difficult-to-reach zones
Turbine: High intensity, adapted for full-scale production
Specially designed tool to project shot within bores (turbine rotor, pipes/tubes, etc.)
Compactage de revêtements organiques
Laser Shock Peening :
No surface contamination (in situ operation, no post treatment, etc.)
Deeper and more intense residual stresses profiles
Precise treatment zones
Laser via optical fiber or air
Equipment @M2P
Shot peening platform
2 shot peening machines
6 axis robot
Nozzle diameters: 4, 10 and 20 mm
Bore stick: 1 800 mm
Rotating table
Shot sieving and separating
Wide selection of shot: Cast steel, Cut wire, ceramics
Monitoring - Shot speed (Shotmeter®) - Offline robot trajectory - Pressure and mass flow
Laser shock peening platform
6 axis robot
Laser beam: 1 J to 1064 nm
Pulses: 5 to 20 ns
Water containment, or other
5 m long optical fiber
Optical fiber cleanliness monitoring during use
Applications
Use of design-of-experiments to optimize shot peening parameters for titanium alloys in order to maximize fatigue enhancement and strike a balance between residual stresses and surface integrity
Impact of shot peening on maraging alloys and process optimization
Laser shock peening for in situ repairs
Examples: Bearings, springs, wheels, landing systems, turbine disks and blades, Weld seams, etc.
