Hardness. Hardness is the resistance of a material to localised plastic deformation. Hardness ranges from super hard materials such as diamond, boron-carbide to other ceramics and hard metals to soft metals and down to plastics and soft tissues. Hardness is just one mechanical measurement and properties such as toughness and strength need to be

Hardness is a powerful property to evaluate the deformation behavior of materials. It serves as 

hardness: ( hard'nes ), 1. The degree of firmness of a solid, as determined by its resistance to deformation, scratching, or abrasion. See also: hardness scale , number . 2. The relative penetrating power of a beam of x-rays, used both within the diagnostic range of energy and in radiation therapy; expressed in terms of half-value layer.

The hardness is expressed as Brinell hardness number, and is obtained by dividing the load in kilograms, by the surface area of the indention in square millimeters. Brinell numbers for commonly used metals range from HB 15 to 750. Typical values include: The hardness of a material is dependent on treatment that the material has been subjected to.

Hardness is the resistance of a material to localized deformation. The term can apply to deformation from indentation, scratching, cutting or bending. In metals 

21/10/  · The hardness of a material is defined as its ability to withstand localized permanent deformation, typically by indentation. Hardness may also be used to describe a material’s

Hardness and toughness are properties related to materials which are generally used in material engineering. Together, they define the 

Hardness is the measure of a material's resistance to localised permanent deformation. Permanent deformation is also called plastic deformation. While elastic deformation means that a material changes its shape only during the application of force, a resulting plastic deformation means that the material will not return to its original shape.

Hardness is a metric that measures how resistant a material is to localised plastic deformation caused by mechanical indentation or abrasion.

The hardness of a material is measured against the scale by finding the hardest material that the given material can scratch, or the softest material that can scratch the given material. For example, if some material is scratched by topaz but not by quartz, its hardness on the Mohs scale would fall between 7 and 8. Indentation hardness.

From a mechanical aspect, the hardness is a measure of resistance against plastic deformation, and it is used to define whether the product