- brinell-hardness tests
- • определяне на твърдостта по Бринел
English-Bulgarian polytechnical dictionary . 2013.
brinell-hardness tests
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Brinell scale — The Brinell scale characterizes the indentation hardness of materials through the scale of penetration of an indenter, loaded on a material test piece. It is one of several definitions of hardness in materials science.Proposed by Swedish engineer … 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
hardness — a measure of the hardness of a metal or mineral. Hardness is a property easy to appreciate but difficult to quantify and measure. The Mohs hardness scale is used in geology to give a rough estimate of hardness by testing which minerals are… … Dictionary of units of measurement
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
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
Meyer hardness test — This graph shows the differences between the Brinell hardness test and the Meyer hardness test. Notice that the Brinell test can report the same hardness value for a given specimen twice depending on the load. The Meyer hardness test is a rarely… … Wikipedia
Mohs scale of mineral hardness — The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German geologist and mineralogist Friedrich Mohs and… … Wikipedia
Твердость — Hardness Твердость. Критерий противодействия материала поверхностному вдавливанию или шлифованию; можно определить как функцию напряжения, требуемого, чтобы произвести некоторый, точно установленный тип поверхностной деформации. Не имеется… … Словарь металлургических терминов
Iron — Fe redirects here. For other uses, see Fe (disambiguation). This article is about the chemical element. For other uses, see Iron (disambiguation). manganese … Wikipedia
materials testing — Introduction measurement of the characteristics and behaviour of such substances as metals, ceramics, or plastics under various conditions. The data thus obtained can be used in specifying the suitability of materials for various… … Universalium
Operational definition — The operational definition of a peanut butter sandwich might be simply the result of putting peanut butter on a slice of bread with a butter knife and laying a second equally sized slice of bread on top An operational definition defines something … Wikipedia
