EN ISO 14577-1:2015

Foreword
Introduction
1 Scope
2 Normative references
3 Symbols and designations
4 Principle
5 Testing machine
6 Test piece
7 Procedure
8 Uncertainty of the results
9 Test report
Annex A (normative) - Materials parameters determined
        from the force/indentation depth data set
Annex B (informative) - Types of control use for the
        indentation process
Annex C (normative) - Machine compliance and indenter
        area function
Annex D (informative) - Notes on diamond indenters
Annex E (normative) - Influence of the test piece surface
        roughness on the accuracy of the results
Annex F (informative) - Correlation of indentation hardness
        H[IT] to Vickers hardness
Annex G (normative) - Drift and creep rate determination
Annex H (informative) - Estimation of uncertainty of the
        calculated values of hardness and materials parameters
Annex I (normative) - Calculation of radial displacement
        Correction
Bibliography

ISO 14577-1:2015 specifies the method of instrumented indentation test for determination of hardness and other materials parameters for the following three ranges: macro range: 2 N ≤ F ≤ 30 kN; micro range: 2 N > F; h > 0,2 µm; and nano range: h ≤ 0,2 µm.For the nano range, the mechanical deformation strongly depends on the real shape of indenter tip and the calculated material parameters are significantly influenced by the contact area function of the indenter used in the testing machine. Therefore, careful calibration of both instrument and indenter shape is required in order to achieve an acceptable reproducibility of the materials parameters determined with different machines.The macro and micro ranges are distinguished by the test forces in relation to the indentation depth.Attention is drawn to the fact that the micro range has an upper limit given by the test force (2 N) and a lower limit given by the indentation depth of 0,2 µm.The determination of hardness and other material parameters is given in Annex A.At high contact pressures, damage to the indenter is possible. For this reason in the macro range, hardmetal indenters are often used. For test pieces with very high hardness and modulus of elasticity, permanent indenter deformation can occur and can be detected using suitable reference materials. It is necessary that its influence on the test result be taken into account.This test method can also be applied to thin metallic and non-metallic coatings and non-metallic materials. In this case, it is recommended that the specifications in the relevant standards be taken into account (see also 6.3 and ISO 14577‑4).