Indentation Method

Strength values ​​from hardness impressions

Basic idea

The basic idea of ​​the method is to obtain material properties by comparing FEM simulations with real measurement data. The advantage is that with FEM simulation input and output data are known. If the simulation and experiment match, the material properties can be taken from the simulation.

Procedure of the test method

  • Hardness impression is force-controlled in a sample and subsequently measured three-dimensionally.
  • FEM simulations with the same boundary conditions (force, application time, specimen) are varied until the geometry of the simulation coincides with the geometry of the 3D measurement.
  • The method converges, if a sufficient match between simulation and experiment is achieved.
  • The material characteristics are taken from the simulation which matches the experiment.
Eindruckverfahren - Prüfablauf

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Applications

The use of the indentation process in industry and research opens up new fields of application for mechanical material testing. Based on a hardness impression, the indentation method can be used to determine the local Rp0.2 yield strength and the tensile strength Rm.

Surface hardening

The strength values ​​set by the surface hardening are often controlled by the hardness test. Statements about the Rp0.2 yield strength and hardening behaviour are often missing at these points. We deliver these characteristics.

Welds

Furthermore, we also determine the local properties of welded joints. Depending on the treatment, the properties vary in the different heat-affected zones. An accurate assessment of the mechanical properties is possible by the impression method.

Tensile test not possible

Is a tensile test not possible? Is the component to be examined too small? Use the impression method to determine the strengths.

Flow curves for component simulations

Check the local strength values ​​of components that you can use for optimization simulations, for example.

Local properties

Check pinpoint strength values ​​in gradients. Similar to a hardness test, you get more characteristics and increase the validity of the investigation.

Anisotropy

Is there a strong anisotropy in your components? We assess your samples or components based on defined criteria.
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