indentation hardness number

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• Indentation hardness — tests are used to determine the hardness of a material to deformation. Several such tests exist, wherein the examined material is indented until an impression is formed; these tests can be performed on a macroscopic or microscopic scale. When… …   Wikipedia

• Brinell hardness number — n a number expressing Brinell hardness and denoting the load applied in testing in kilograms divided by the spherical area of indentation produced in the specimen in square millimeters * * * Bri·nell hardness number (brĭ nelґ) [Johann August …   Medical dictionary

• Vickers hardness number — (HV or VHN) or Vickers pyramid number (VPN)    a measure of the hardness of a metal introduced by Vickers in 1922. In the Vickers test (suitable for surface hardened metals), a pyramidal diamond is pressed into the material being tested. The… …   Dictionary of units of measurement

• Vickers hardness number — a number indicative of the degree of relative hardness of materials, determined by measuring the long diagonals of indentation made by pressing the pyramidal point of a diamond into the surface of the material being tested; equal to the load in… …   Medical dictionary

• Brinell hardness number — noun Date: 1915 a number expressing Brinell hardness and denoting the load applied in testing in kilograms divided by the spherical area of indentation produced in the specimen in square millimeters called also Brinell number …   New Collegiate Dictionary

• hardness tester — ▪ device       device that indicates the hardness of a material, usually by measuring the effect on its surface of a localized penetration by a standardized rounded or pointed indenter of diamond, carbide, or hard steel.       Brinell hardness is …   Universalium

• hardness — 1. The degree of firmness of a solid, as determined by its resistance to deformation, scratching, or abrasion. SEE ALSO: h. scale, number. 2. The relative penetrating power of a beam of x rays, used both within the diagnostic range of …   Medical dictionary

• Vickers hardness test — A Vickers hardness tester The Vickers hardness test was developed in 1924 by Smith and Sandland at Vickers Ltd as an alternative to the Brinell method to measure the hardness of materials.[1] The Vickers test is often easier to use than other… …   Wikipedia

• Vickers hardness — ▪ mineralogy       a measure of the hardness of a material, calculated from the size of an impression produced under load by a pyramid shaped diamond indenter. Devised in the 1920s by engineers at Vickers, Ltd., in the United Kingdom, the diamond …   Universalium

• brinell hardness — brə̇ˈnel , ˈbriˌn noun Usage: usually capitalized B Etymology: after Johann A. Brinell died 1925 Swedish engineer : the hardness of a metal or alloy measured by a manually operated vertical hydraulic press in which a hard steel or carbide ball of …   Useful english dictionary

• Rockwell number — Metall. a numerical expression of the hardness of a metal as determined by a test (Rockwell test) made by indenting a test piece with a Brale, or with a steel ball of specific diameter, under two successive loads and measuring the resulting… …   Universalium