Indenter
An indenter is a hard, specially shaped test piece like a diamond pyramid or carbide ball. It is pressed into the material to measure its hardness. The depth of the impression gives the hardness.
Physical-Chemical Mechanism of Action
An indenter is an extremely hard material test piece that is pressed into the material. The pressure causes a plastic deformation zone in the material, and the depth of the remaining impression gives the hardness.
Metallurgical Relevance & Welding Risks
The hardness of a material is crucial for its mechanical properties. Too high hardness can lead to crack-sensitive microstructures, especially in martensite. For hardness testing, the material must be properly prepared and tested to obtain accurate results.
Workshop Practice & Instructions
Use an indenter with a known hardness grade. Press it into the material under constant load and measure the impression depth. Compare the result with a standard material or a reference chart to determine the material's hardness.