• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Laboratoire Mechanics, Surfaces and Materials Processing (MSMP)
  • View Item
  • Home
  • Laboratoire Mechanics, Surfaces and Materials Processing (MSMP)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Multi-scale approach of the instrumented indentation technique on the fracture toughness estimation

Communication sans acte
Author
MEJIAS, A
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
CHICOT, Didier
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
DECOOPMAN, Xavier
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
ROUDET, Francine
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
IOST, Alain
ccMONTAGNE, Alex
211915 Mechanics surfaces and materials processing [MSMP]

URI
http://hdl.handle.net/10985/10875
Date
2015

Abstract

Instrumented Indentation Technique (IIT) is widely used to determine the mechanical properties of materials. The elastic modulus is usually determined by applying the methodology proposed by Oliver and Pharr [1] who supposed that its value is independent of the indentation depth. However, some authors [2, 3] have observed a decrease of the elastic modulus when the indenter displacement increases which allowed them to introduce a continuous damage theory used afterwards to estimate the fracture toughness of ductile materials. The assumption made by the authors is that a damage in the region very close to the bottom of the indent results in the formation of microvoids which leads to the variation of the elastic modulus as a function of the indenter displacement. Starting from this observation, Lee et al. [2] proposed an energy model based on the Griffith’s theory and the continuous damage mechanics (CDM) which states that the elastic modulus variation is related to the fraction void volume through a variable damage, introduced by Kachanov [4], related to the surface density of the microdefects. On the other hand, the works carried out over ductile materials by Li et al. [3] have been performed only with nanoindentation data preventing a discussion on the scale-­‐effect. (...)

Files in this item

Name:
meijas.pdf
Size:
284.2Kb
Format:
PDF
View/Open

Collections

  • Laboratoire Mechanics, Surfaces and Materials Processing (MSMP)

Related items

Showing items related by title, author, creator and subject.

  • Propriétés mécaniques par indentation d’un film mince nanometrique de nitrure d’aluminium 
    Article dans une revue avec comité de lecture
    ROUDET, Francine; CHICOT, Didier; DECOOPMAN, Xavier; IOST, Alain; BÜRGI, Juan; MOLLEJA, Javier Garcia; FEUGEAS, Jorge (EDP Sciences, 2015)
    Les propriétés mécaniques des films minces sont généralement déterminées par nanoindentation pour éviter l’influence du substrat. En effet, nous savons que le substrat influence cette mesure dès lors que l’indenteur pénètre ...
  • Analysis of indentation size effect in copper and its alloys 
    Article dans une revue avec comité de lecture
    CHICOT, Didier; PUCHI-CABRERA, Eli-Saul; IOST, Alain; STAIA, M.H; DECOOPMAN, Xavier; ROUDET, F.; LOUIS, G. (Maney Publishing, 2013)
    For describing the indentation size effect (ISE), numerous models, which relate the load or hardness to the indent dimensions, have been proposed. Unfortunately, it is still difficult to associate the different parameters ...
  • Multiscale and multicycle instrumented indentation to determine mechanical properties: Application to the BK7 crown borosilicate 
    Article dans une revue avec comité de lecture
    BENTOUMI, Mohamed; BOUZID, Djamel; BENZAAMA, H; MEJIAS, Alberto; KOSSMAN, Stephania; IOST, Alain; CHICOT, Didier; ccMONTAGNE, Alex (Cambridge University Press (CUP), 2017)
    In this work, nano, micro, and macro-indentation tests under standard or multicycle loading conditions were performed for studying the mechanical behavior of a crown borosilicate glass sample with the objective to study ...
  • Hardness-load modelling applied to multilayer galvanised coatings 
    Article dans une revue avec comité de lecture
    BENARIOUA, Younef; MEJIAS, Alberto; ROUDET, Francine; IOST, Alain; CHICOT, Didier (Maney Publishing, 2016)
    During the last past decades, galvanised steels have been extensively developed to improve corrosion resistance of steels due to their excellent chemical properties particularly in severe atmospheric conditions. The objective ...
  • Study of the mechanical behavior and corrosion resistance of hydroxyapatite sol–gel thin coatings on 316 L stainless steel pre-coated with titania film 
    Article dans une revue avec comité de lecture
    SIDANE, Djahida; CHICOT, Didier; YALA, Sabeha; ZIANI, Salima; KHIREDDINE, Hafit; IOST, Alain; DECOOPMAN, Xavier (ELSEVIER, 2015)
    In order to reinforce the clinical applications of hydroxyapatite (HAP) sol–gel coatings deposited onto 316 L stainless steel, we suggest the introduction of an intermediate thin layer of titania (TiO2) on the substrate. ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales