kovettuneisuuden
Kovettuneisuuden, often translated as hardness, is a fundamental material property that describes a substance's resistance to deformation, particularly indentation, scratching, or abrasion. It is not a measure of strength, which refers to a material's ability to withstand stress without permanent deformation or fracture, but rather how difficult it is to penetrate or scratch the surface. Different types of hardness exist, each measured using distinct testing methods and quantifying resistance to specific forms of surface damage.
Commonly, hardness is assessed through methods like the Brinell, Rockwell, Vickers, and Mohs scales. The Brinell
The hardness of a material is influenced by factors such as its chemical composition, crystal structure, microstructure,