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Mechanical surface treatment
Mechanical surface treatment

Mechanical surface treatment

Improving mechanical properties through compressive residual stresses

Mechanical surface treatment

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



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

    Mechanical surface treatment

    Mechanical surface treatment

    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

    Mechanical surface treatment

    Mechanical surface treatment



    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.


    Mechanical surface treatment