Assessment of mechanical property gradients after impact-based surface treatment: application to pure alpha-iron

David Tumbajoy-Spinel 1, 2, 3 Sylvie Descartes 4 Jean-Michel Bergheau 5 Victor Lacaille 6, 5 Gaylord Guillonneau 7, 5 Johann Michler 7 Guillaume Kermouche 1, 3, 2
1 PMM-ENSMSE- Département Physique et Mécanique des Matériaux
2 SMS-ENSMSE - Centre Science des Matériaux et des Structures
3 LGF-ENSMSE - Laboratoire Georges Friedel
4 LaMCoS - Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne]
5 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes
6 WINOA
7 EMPA - Swiss Federal Laboratories for Materials Science and Technology [Thun]
Abstract : Mechanical surface treatments are known for their ability to improve material resistance to abrasive wear and local fatigue crack microstructure of the home-made crack propagation. These treatments are based on repeated contact loadings which create large plastic strains in the near-surface that can induce a local grain refinement. In this case, a significant increase in the near-surface local mechanical properties is thus usually observed. In this paper, nano-mechanical tests are used to quantify the mechanical property gradient in the near-surface of a purity-controlled alpha-iron after an impact-based treatment. A methodology based on the combination of two different techniques is proposed: nano-indentation and in-situ micro-pillar compression. The resulting in-depth mechanical properties gradient is compared to the average grain size measured by EBSD. A positive relationship with the well-known Hall-Fetch effect is observed.
Keywords : SHARP INDENTATION DISLOCATION DENSITY ATTRITION TREATMENT STACKING-FAULT ENERGY GRAIN-SIZE HALL-PETCH RELATIONSHIP SEVERE PLASTIC-DEFORMATION Iron Tribologically Transformed Surface Mechanical surface treatment Mechanical property gradient In situ micro-pillar compression Nano-indentation STAINLESS-STEEL INDENTATION EXPERIMENTS NANOCRYSTALLINE MATERIALS
Type de document :
Article dans une revue
Materials Science and Engineering: A, Elsevier, 2016, 667 (189-198), 〈10.1016/j.msea.2016.04.059 〉
Liste complète des métadonnées
https://hal-emse.ccsd.cnrs.fr/emse-01505794
Contributeur : Géraldine Fournier-Moulin <>
Soumis le : mardi 20 novembre 2018 - 00:41:55
Dernière modification le : jeudi 29 novembre 2018 - 15:21:18

Fichier

tumbajoyspinel2016.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

EMSE | ENTPE | LTDS | INSA-LYON | LAMCOS | EC-LYON

Citation

David Tumbajoy-Spinel, Sylvie Descartes, Jean-Michel Bergheau, Victor Lacaille, Gaylord Guillonneau, et al.. Assessment of mechanical property gradients after impact-based surface treatment: application to pure alpha-iron. Materials Science and Engineering: A, Elsevier, 2016, 667 (189-198), 〈10.1016/j.msea.2016.04.059 〉. 〈emse-01505794〉

Exporter

BibTeX TEI DC DCterms EndNote

Partager

Métriques

Consultations de la notice

143

Téléchargements de fichiers

2

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD