NF A91-118

NF A91-118

October 1981
Standard Cancelled

Metallic coatings. Vickers and Knoop microhardness tests.

Main informations

Collections

National standards and national normative documents

Publication date

October 1981

Number of pages

10 p.

Reference

NF A91-118

ICS Codes

25.220.40   Metallic coatings

Classification index

A91-118

Print number

1 - 01/10/1981

International kinship

ISO 4516:1980
Standard replaced by (1)
NF EN ISO 4516
October 2002
Standard Current
Metallic and other inorganic coatings - Vickers and Knoop microhardness tests

ISO 4516 describes the application of the Vickers and Knoop micro-indentation tests for determining the microhardness of metallic and other inorganic coatings. This method is applicable where indenter forces generally need to be below 10 N, e.g., for electrodeposited coatings, autocatalytic coatings, sprayed coatings and anodic coatings on aluminium. It is applicable to measurements normal to the coated surface and to measurements on cross-sections.

Table of contents
  • Avant-propos
    2
  • Introduction
    2
  • 1 Objet et domaine d'application
    2
  • 2 Références
    2
  • 3 Principe
    2
  • 4 Symboles et désignations
    3
  • 5 Appareillage
    3
  • 5.1 Appareil d'essai
    3
  • 5.2 Pénétrateurs
    4
  • 5.3 Blocs de référence normalisés
    4
  • 6 Facteurs affectant la précision
    4
  • 6.1 Charge d'essai
    4
  • 6.2 Vitesse d'application de la charge
    5
  • 6.3 Durée d'application de la charge d'essai
    5
  • 6.4 Vibrations
    5
  • 6.5 État de surface de l'échantillon
    5
  • 6.6 Orientation
    6
  • 6.7 Matériaux fragiles
    6
  • 6.8 Pouvoir de résolution du microscope
    6
  • 6.9 Emplacement des empreintes
    6
  • 7 Mode opératoire
    6
  • 7.1 Généralités
    6
  • 7.2 Choix de la charge d'essai
    6
  • 7.3 Mesurage sur coupe transversale
    7
  • 7.4 Mesurage perpendiculairement à la surface
    7
  • 7.5 Température
    7
  • 7.6 Optique
    7
  • 7.7 Calculs
    8
  • 7.8 Éprouvettes
    8
  • 8 Expression des résultats
    8
  • 9 Procès-verbal d'essai
    8
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