diamantpyramidhårdhetstestet

The diamantpyramidhårdhetstestet, also known as the Vickers hardness test, is a method of measuring the hardness of materials. It involves pressing a diamond pyramid indenter of a specific size and shape into the surface of the material being tested. The indenter is a square-based pyramid with an angle of 136 degrees between opposite faces. The load applied to the indenter can vary depending on the material's expected hardness.

After a predetermined dwell time, the indenter is removed, leaving an indentation on the material's surface. The length of the diagonals of this indentation is then measured using a microscope. The Vickers hardness number (HV) is calculated by dividing the applied load by the surface area of the indentation. A higher HV value indicates a harder material.

This test is widely used across various industries due to its accuracy and ability to test a wide range of materials, from very soft metals to very hard ceramics. It is particularly useful for materials where other hardness tests might be less suitable, such as thin materials or those with a very hard surface. The test can be performed at different temperatures and under various environmental conditions. The indentation size is independent of the applied load, meaning that consistent results can be obtained with different load levels, as long as the indentation is not too shallow.