Equation icon  Brinell hardness

 
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Resource type: Equation
Description: The Brinell hardness test is a measure of a material's resistance to permanent deformation at the surface using a spherical indenter (ball bearing). Although not strictly speaking a property, hardness is often used in materials selection process. The equation relates specifically to the spherical testing process and equipment.

TeX format: BHN = \frac{F}{{\pi\over 2}D(D - \sqrt{D^2-d^2})}

BHN {BHN} = Brinell Hardness Number (Pa) {Pa}
D {D} = Indenter ball diameter (m) {m}
d {d} = Mean indent diameter (m) {m}

Keywords: hardness • Brinell • spherical indent • testing • surface • yield strength
Categories: Science approaches
Science approaches > Deformation & failure > Plastic deformation
Science approaches > Strengthening mechanisms > Martensitic hardening
Applications > Manufacturing & industry
Properties > Mechanical & thermal > Yield strength
Properties > Mechanical & thermal > Hardness
Properties > Mechanical & thermal > Impact toughness
Testing, analysis & experimentation > Mechanical testing
Created by: The University of Liverpool
License: This resource is released under the Creative Commons Attribution license (2.0 UK: England & Wales).
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Date created: 07 July 2010
Date added: 04 August 2010
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Resource ID: 3175