Vickers diamond hardness test

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• 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 test — ˈvikə(r)z noun Usage: usually capitalized V Etymology: probably from Vickers Armstrong Ltd., British steel manufacturing concern : an indentation hardness test for metals in which a 136 degree diamond pyramid is pressed into the surface of the… …   Useful english dictionary

• Vickers hardness test — a method of determining the hardness of steel whereby a diamond pyramid is pressed into the polished surface of the specimen and the diagonals of the impression are measured with a microscope fitted with a micrometer eye piece. The rate of… …   Mechanics glossary

• Knoop hardness test — The Knoop hardness test is a microhardness test a test for mechanical hardness used particularly for very brittle materials or thin sheets, where only a small indentation may be made for testing purposes. A pyramidal diamond point is pressed into …   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

• Hardness — This article is about mechanical properties of materials. For other uses, see Hard. Hardness is the measure of how resistant solid matter is to various kinds of permanent shape change when a force is applied. Macroscopic hardness is generally… …   Wikipedia

• test — bend test Brinell hardness test Charpy test creep test cup test diamond pyramid hardnesstest elongation test end quench test endurance test impact test Izod impact test Jominy test …   Mechanics glossary

• 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 number — Metall. a numerical expression of the hardness of a metal as determined by a test (Vickers test) in which the sample is indented under a known pressure by the point of a diamond and the surface area of the indentation is divided into the amount… …   Universalium

• Vickers number — Metall. a numerical expression of the hardness of a metal as determined by a test (Vickers test) in which the sample is indented under a known pressure by the point of a diamond and the surface area of the indentation is divided into the amount… …   Useful english dictionary

• 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