Ultrasonic Shot Peening Process

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Ultrasonic Shot Peening
Ultrasonic Shot Peening Process

What is Ultrasonic Shot Peening ?

Our Ultrasonic Shot Peening (USP) process is used to improve:

Fatigue resistance
Resistance to stress corrosion cracking and contact fatigue

This surface impact treatment solution consists in bombarding the specific area to be peened with small projectiles (= media). This action induces residual compressive stress on the surface, which delays the appearance of cracks, and improves the lifetime of the part.

Ultrasonic Shot peening - SONATS - EMPOWERING TECHNOLOGIES

To fully understand ultrasonic shot peening, download our flyer.

Principle of shot peening

J.Almen discovered shot peening in the 1930s while working for General Motors.

It is a process used to induce superficial compressive stress, and to modify the mechanical properties of metals. The method consists in striking a surface with projectiles (metal, glass or ceramic beads) at high speed, with sufficient force to create a plastic deformation: each ball acts like a mini-hammer.

The process, due to the successive impacts, causes changes in the mechanical properties of the surface. Shot peening is often required for repairs to fragile areas, to compensate for tensile stresses due to machining and to replace them with compressive stresses. Depending on the part geometry and material, as well as the projectile material, quality, intensity and field of action, it can improve fatigue resistance from 0 to 1000%. The compressive surface stresses create fatigue resistance and resistance to certain forms of stress corrosion cracking.

Conventional methods of shot peening propel projectiles using compressed air and centrifugal wheel systems. Other methods include ultrasonic shot peening, wet shot peening and laser peening (which does not use projectiles).

Our sister company SONATS specialises in ultrasonic shot peening, STRESSONIC® technology has matured and has proven its advantages.

Advantages of Ultrasonic Shot Peening

SONATS provides innovative USP equipment. The equipment is developed using STRESSONIC® technology and offers new solutions to overcome the limits of conventional shot peening. This means:

Increased productivity and quality

improved fatigue resistance
processing of complex geometry parts
low roughness

Lower costs

shorter treatment cycle
reduction in the amount of medias, energy and compressed air used
easy integration into the production line
treatment often possible in-situ without dismantling equipment to isolate the work piece

Moreover, the use of high quality beads and real-time parameters control ensure repeatability and treatment efficiency.

USP generates an optimal surface condition (roughness) and is generally better than conventional shot peening processes.

Roughness comparison - Convetionnal Shot Peening and Ultrasonic Shot Peening - SONATS

Comparison of surface condition (roughness and shot peening post-treatment) on two 7000 series aluminium strips with identical shot peening intensity (12A)

Comparison of surface condition (roughness and shot peening post-treatment) on two 7000 series aluminium strips with identical shot peening intensity (12A)

Comparison of gear residual stress profiles before and after shot peening with STRESSONIC® technology

Comparison of gear residual stress profiles before and after shot peening with STRESSONIC® technology

SONATS provides a wide range of solutions to meet your needs:

Standard portable equipment, STRESSVOYAGER® USP, for localised shot peening operations

Ex-situ-Subcontract-shot-peening | SONATS

Customized machines, designed and developed according to the specific needs of our customers

Customized-machine-Shot-peening-treatment-for-transmission-shaft | SONATS

Services and sub-contracting on our premises or at your site

Shot peening services and subcontracting | SONATS

To find out more about the ultrasonic shot peening process, its advantages and examples of use-cases, download our flyer.

Scientific publications

Simulation of shot peening

LASMIS, IRT, M2P, ENSAM

Donato Gallitelli, Vincent Boyer, Maxime Gelineau, Yann Colaitis, Emmanuelle Rouhaud, et al.. Simulation of shot peening: From process parameters to residual stress fields in a structure. Comptes Rendus Mécanique, Elsevier Masson, 2016, 344 (4-5), pp.355-374.

LASMIS UTT Troyes

Badreddine et al. Impact velocity and distribution in ultrasonic shot peening (USP). ICSP-11. 2011. South Bend, USA. pp99-104.

LASMIS UTT Troyes

Gallitelli, D . From process parameters to residual stress field: complete USP simulation. ICSP-12. 2014. Goslar, Germany. pp.365-369.

LASMIS, UTT, Troyes – SONATS

Badreddline, J . A model for USP: optimization of chamber design in an industrial context. ICSP-12. 2014. Goslar, Germany. pp.370-375.

FRAUNHOFER IWM

Schubnell, J. et al. Numerical Simulation of Shot Dynamics and the Material Surface Condition of IN718 After USP. ICSP-13. 2017. Montreal, Quebec, Canada. pp.550-554.

ICD, LASMIS – SONATS

Badreddine. J, CAD based model of USP for complex industrial parts, Advances in Engineering Softwatre, Elsevier, 2014, v76, pp 31-52

Shot peening

SONATS

Duchazeaubeneix. JM. Stressonic Shot Peening (Ultrasonic process). ICSP-7. 1999. Warslaw, Poland. pp.444-452.

TOYO SEIKO – SONATS

Hattori, K. Watanabe, Y. Handa, M. Duchazeaubeneix, JM. Searching for the Most Suitable Condition and the Suggestion of Each Application in Ultrasonic Shot Peening (USP). ICSP-8. 2002. Garmisch-Partenkirchen, Germany. pp-16-20.

TOYO SEIKO – SONATS

Watanabe, Y et al. The Effect of Frozen USP Treatment on Two Way Characteristic at Shape Memory Alloy. ICSP-11. 2011. South Bend, USA. pp.365-370.

Université de Lorraine

Novelli, M. et al. Stress-assisted versus strain-induced martensites formed by cryogenic USP in austenitic stainless steels. ICSP-13. 2017. Montreal, Quebec, Canada. pp.509-515.

Université de Technologies de Troyes

Morançais. A, Effet du grenaillage sur la durée de vie des aubes monocristallines de turbine, Thèse de doctorat en Matériaux, Mécanique, Optique et Nanotechnologie, École doctorale Sciences pour l’ingénieur, Troyes, 2016

Indian Institute of Technology (Banaras Hindu University)

Rai. P. K et al, Effect of USP on Microstructure and Mechanical Properties of High-Nitrogen Austenitic Stainless Steel, Journal of Materials Engineering and Performance, Issue 11, 2014, V23, pp 4055-4064

Improve fatigue resistance

TOYO SEIKO – GIFU UNIVERSITY – SONATS

Watanabe et al. Effect of Ultrasonic Shot Peening on Fatigue Strength of High Strength Steel. ICSP-8. 2002. Garmisch-Partenkirchen, Germany. pp.16-20.

AVION SOLUTIONS

McClurg, K et al. Residual Compressive Stress Benefits on Core Aerospace Materials Using Ultrasonic Shot Peening. ICSP-13. 2017. Montreal, Quebec, Canada. pp.323-327.

IITBHU

Chattopadhyay. K et al, Effect of surface nanostructure on tensile and low cycle fatigue behavior of Al 2014 alloy, IOP Coference Series : Materials Science and Engineering, 2014

Department of Mechanical, Aichi Institute of Technology

Takeda. K et al, Enhancement of Fatigue Life in TiNi Shape Memory Alloy by Ultrasonic Shot Peening (USP), 2015

Département Génie des Matériaux ENIS

Elleuch. K et al, On fretting of XC38 steel: surface treatments effect, Tribology – Materials, surfaces and interfaces, Issue 1: Special issue on Fretting Damage, 2008, V2, pp33-38

Indian Institute of Technology

Pandey. V et al, Role of USP on low cycle fatigue behavior of 7075 aluminium alloy, International journal of fatigue, Elsevier, 2017, v103, pp 426-435.

Nanocrystallisation

Banaras Hindu University

Kumar. S et al, Effect of surface nanostructure on tensile behavior of superalloy IN718, Materials and Design (1980-2015), Elsevier, 2014, v62, pp76-82.

Université de Lorraine, Laboratoire d’étude des Microstructures et des Mécaniques des Matériaux

Youssef. S, Thermomechanical surface treatments of austenitic stainless steels and their effects on subsequent nitriding during “Duplex” treatments, Thèse de doctorat en sciences des matériaux,Université de Lorraine, 2014

Nanocrystallisation and effects on fatigue

Indian Institute of Technology (Banara Hindu University)

Kumar. S, Effect of surface nanostructure on tensile behavior of superalloy IN718, 7th International Conference on Creep, Fatigue and Creep – Fatigue Interaction (Cf-7), 2016, Tamil Nadu, India, pp 398-403.

Banaras Hindu University

Pandey. V et al, Effect of surface Nanostructuring on LCF behavior of aluminum alloy 2014, Materials Science and Engineering: A, Elsevier, 2015, v647, pp 201-211.

Shot peening on ceramics

Institute of Electronic Materials Technology (Poland)

H. Tomaszewski et al, Shot Peening – A New Method for Improving Mechanical Properties of Structural Ceramics, Key Engineering Materials, 2006, Vols. 317-318, pp. 277-280

Institute of Electronic Materials Technology (Poland)

H. Tomaszewski et al, Modification of alumina ceramics properties by Stressonic® shotpeening , Materials Science Forum, 2005, Vols. 490-491, pp. 509-514

Institute of Electronic Materials Technology (Poland)

Tomaszewski. H et al, Shot Peening in Structural Ceramics, Ceramics Materials, 2010, issue 62, V3, pp 266-271

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