kovuusarvo
Kovuusarvo, or hardness value, is a material property that describes its resistance to permanent deformation, typically under indentation. It is a practical indicator of wear resistance and deformation resistance, but it does not by itself measure toughness or strength.
Hardness is determined through indentation tests that use different indenter shapes and loads. Common methods include
Several factors influence the measured hardness, including the material’s microstructure and heat treatment, surface finish, test
Relation to other properties is material-specific. In metals, hardness often correlates with strength and wear resistance,
Limitations include that hardness alone does not reflect fracture toughness, impact resistance, or fatigue behavior. Some