A property to test hardness and softness of materials ✌️✌️✌️
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Hardness is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion. Some materials (e.g. metals) are harder than others (e.g. plastics, wood). Macroscopic hardness is generally characterized by strong intermolecular bonds, but the behavior of solid materials under force is complex; therefore, there are different measurements of hardness: scratch hardness, indentation hardness, and rebound hardness.
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The ability of materials to resist scratching by another material can be ranked by referring to the Mohs scale which assesses relativehardness of the materials. In metallurgy hardness is defined as the ability of a material to resist plastic deformation.
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