Later, in 1939, Fredrick Knoop introduced an alternative to the micro Vickers
hardness test, signified as the Knoop
hardness test.
The principle of the
hardness test is that the depth of indentation depends on the hardness of the material.
In achieving this goal, Nanovea has also brought full automation to this type of mechanical
hardness test for the first time.
These tests differ from impact and
hardness tests in that applied force is absorbed slowly.
The pendulum
hardness test of a coating applied to a test panel can be carried out in accordance with the test methods using either the Persoz or Konig pendulums as described in ASTM D 4366, BS 3900 E5, DIN 53157, ISO 1522 or NF T30-016.
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hardness test.
Pencil hardness is a very common
hardness test for organic coatings (ASTM D 3363).
However, for an HRC
hardness test, the indentation process includes plastic deformation.
The WJN-HCU software offers unrestricted test parameter definition, and any measurement application can be defined in Excel, resulting in significantly more information about a material than can be obtained using a conventional
hardness test instrument.
One of the most common causes of test variation results from the Brinell
Hardness Test technique employed by the operator.
This method, which is only used nowadays for very large specimens such as steel forgings or rolls, is considered an indentation
hardness test since the hammer penetrates the specimen, albeit with both elastic and plastic deformation components.
Thus, a
hardness test on carbide basically establishes the depth of penetration of the indentor into the softer binder material containing the distributed, suspended hard grains.
