DIN Standards Committee Materials Testing
Metallic materials - Instrumented indentation test for hardness and materials parameters - Part 1: Test method (ISO/DIS 14577-1:2024); German and English version prEN ISO 14577-1:2024
Abstract
This document 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). The analysis methods used in this standard do not take into account the effects of residual stress and indentation pile up or sink in the test piece material, both of which cause an offset to the indentation response that changes the calculated measured value.
Begin
2022-07-05
WI
EC101195
Planned document number
DIN EN ISO 14577-1
Project number
06236344
Responsible national committee
NA 062-01-41 AA - Hardness testing for metals
Responsible european committee
CEN/TC 459/SC 1 - Test methods for steel (other than chemical analysis)
Responsible international committee
draft standard
Metallic materials - Instrumented indentation test for hardness and materials parameters - Part 1: Test method (ISO/DIS 14577-1:2024); German and English version prEN ISO 14577-1:2024
2024-09
Order from DIN Media
