Knowledge & Skills
Materials Engineering, 25th of June 2022, 020004

On the use of nano mechanical testing to characterize materials transformations induced by surface manufacturing processes

Guillaume Kermouche

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Laboratoire Georges Friedel, MMP UMR 5307, Institut Mines Telecom, Ecole des Mines de Saint-Etienne, France

Associate editor: J. C. Outeiro

*Corresponding author: [email protected]

https://doi.org/10.53229/k.and.s.2021.020004

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Abstract

Content

Surface manufacturing processes - such as machining, shot peening, burnishing, polishing- are known for their consequences on surface integrity. They are mostly triggered by repeated and intense contact loadings leading to large plastic deformation, high strain strain rate and high temperature rise in the near-surface. A significant in-depth gradient of mechanical properties is usually observed over 10 to 100 µm depending on the process. This gradient is a consequence of near-surface materials transformation and can play on materials performance (fatigue, stress-corrosion, wear). The accurate characterization of the mechanical properties of these new materials at the right scale is therefore of primary importance. It can be made through the use of suitable methodologies based on nanomechanical testing –i.e. micropillar compression, nanoindentation. The nanomechanical testing field is actually reaching a maturity level that allows its deployment to materials transformation induced by surface manufacturing processes. The first part of this presentation will be dedicated to a brief review of the last developments in the nanomechanical testing field, with a special focus on high temperature, high strain rate and fatigue testing. The second part will deal with the application of nanomechanical testing to investigate consequences induced by manufacturing processes. More specifically, various cases ranging from severe shot peening to sliding friction contacts are investigated. The last part of this presentation will focus on a new high-temperature nanoindentation procedure developed on purpose to investigate the thermal stability of these surface-processed materials.

Keywords:
Surface integrity, 

manufacturing processes,

Nanomechanical testing,

Materials characterization


Duration: 

27 minutes video  


Language:
English    


This keynote presentation was given during the 6th CIRP Conference on Surface Integrity

References

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(2) Kermouche G. et al,, Perfectly plastic flow in silica glass, Acta Materialia, 114, pp. 146-153 (2016). https://doi.org/10.1016/j.actamat.2016.05.027

(3) Tumbajoy-Spinel D. et al, Assessment of mechanical properties gradient after impact-based surface mechanical treatment. Application to a pure alpha-iron », Materials Science & Engineering A, 664, pp. 189-198 (2016).  https://doi.org/10.1016/j.msea.2016.04.059

(4) Tumbajoy-Spinel D.  et al, Microstructural and micro mechanical investigations of surface strengthening mechanisms induced by repeated impacts on pure iron, Materials & Design, 147, pp. 56-64 (2018). https://doi.org/10.1016/j.matdes.2018.03.014

(5) Breumier S. Et al., High strain rate micro-compression for crystal plasticity constitutive law parameters identification, Materials & Design, 193, 108789 (2020). https://doi.org/10.1016/j.matdes.2020.108789

(6) Guillonneau, G., Sao Joao, S., Adogou, B. et al. Plastic Flow Under Shear-Compression at the Micron Scale-Application on Amorphous Silica at High Strain Rate. JOM 74, 2231–2237 (2022). https://doi.org/10.1007/s11837-021-05142-7

(7) Mondelin A. et al, Hybrid model for the prediction of residual stresses induced by 15-5PH steel turning, International Journal of Mechanical Sciences, 58(1), pp. 69-85 (2012). https://doi.org/10.1016/j.ijmecsci.2012.03.003

(8) Kermouche G. et al., Microstructure Evolution Induced by Sliding-Based Surface Thermomechanical Treatments - Application to Pure Copper,  Materials Science Forum, 879, pp. 915-920 (2017). https://doi.org/10.4028/www.scientific.net/MSF.879.915

(9) Baral P. Et al., In situ characterization of AA 1050 recrystallization kinetic using high temperature nanoindentation testing, Materials & Design, 152, pp. 22-29 (2018). https://doi.org/10.1016/j.matdes.2018.04.053

(10) Tiphéne, G., Baral, P., Comby-Dassonneville, S. et al. High-Temperature Scanning Indentation: A new method to investigate in situ metallurgical evolution along temperature ramps. Journal of Materials Research 36, 2383–2396 (2021). https://doi.org/10.1557/s43578-021-00107-7

Full presentation

Citation

G. Kermouche, 2022, « On the use of nano mechanical testing to characterize materials transformations induced by surface manufacturing processes», Knowledge and Skills, ISSN 2800-2083, Materials Engineering, 020004, https://doi.org/10.53229/k.and.s.2021.020004

On the use of nano mechanical testing to characterize materials transformations induced by surface manufacturing processes
presented by Pr. Guillaume Kermouche

 

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