Vickers hardness

См. также в других словарях:

• Vickers hardness number — Vickers hardness number. См. Число твердости по Виккерсу. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

• Vickers hardness test — Vickers hardness test. См. Определение твердости по Виккерсу. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

• 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 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 — ▪ 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

• 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 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

• 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

• Vickers (disambiguation) — Vickers may refer to:Organisations*Vickers, a British engineering conglomerate founded in 1828. ** Vickers Limited ** Vickers Armstrongs ** Vickers plc ** Vickers Defence Systems, defence arm of Vickers plc, sold by Rolls Royce plc to Alvis plc… …   Wikipedia

• Vickers-Armstrongs — For other companies using the Vickers name, see Vickers. Vickers Armstrongs Limited Fate Assets split and majority nationalised Successor Vickers plc British Aircraft Corporation (est.1960) …   Wikipedia

• 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