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Journal articles
Assessment of mechanical property gradients after impact-based surface treatment: application to pure alpha-iron
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
https://hal-emse.ccsd.cnrs.fr/emse-01505794
Contributor : Géraldine Fournier-Moulin <>
Submitted on : Tuesday, November 20, 2018 - 12:41:55 AM
Last modification on : Tuesday, August 4, 2020 - 8:15:02 AM
Contributor : Géraldine Fournier-Moulin <>
Submitted on : Tuesday, November 20, 2018 - 12:41:55 AM
Last modification on : Tuesday, August 4, 2020 - 8:15:02 AM
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tumbajoyspinel2016.pdf
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