![]() Based on the measured values, it is necessary to describe the. Therefore, a large, shallow indentation indicates a softer material, while a small, deep indentation indicates a harder material. The Brinell hardness test is one of the most used mechanical tests in the industry to assure the quality of metallurgical processes. Generally, the harder the material, the smaller the indentation. The Brinell method produces the deepest indentation making this method versatile for measuring the hardness of various materials accurately, taking into account the irregularity of material surface and structure of the material. A tungsten carbide ball is used for harder materials instead of a steel ball. Since a ball of steel with radius “R” is used as an indenter in this method, the Brinell hardness of the material will be directly proportional to its elastic modulus and inversely proportional to Poisson’s ratio. ![]() The indentation depth, “d”, is called Brinell depth and depends upon both applied load and sample hardness. Based on the initial and final diameters of the indentation, the percent of density change can be calculated to determine the material’s hardness value. The smallest indentation made into the material is then measured and recorded. ![]() Principle and Theory of Brinell Hardness Testīrinell hardness testing uses a known-sized ball with a diameter of 10mm and is pressed into the material with a specified amount of force.
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