Macroindentation Tests
The term "macroindentation" is applied to tests with a larger test load, such as 1 kgf or more. There are various macroindentation tests, including:
- Vickers hardness test (HV), which has one of the widest scales
- Brinell hardness test (HB)
- Knoop hardness test (HK), for measurement over small areas
- Janka hardness test, for wood
- Meyer hardness test
- Rockwell hardness test (HR), principally used in the USA
- Shore hardness test, for polymers
- Barcol hardness test, for composite materials.
There is, in general, no simple relationship between the results of different hardness tests. Though there are practical conversion tables for hard steels, for example, some materials show qualitatively different behaviors under the various measurement methods. The Vickers and Brinell hardness scales correlate well over a wide range, however, with Brinell only producing overestimated values at high loads.
Read more about this topic: Indentation Hardness
Famous quotes containing the word tests:
“What is a novel? I say: an invented story. At the same time a story which, though invented has the power to ring true. True to what? True to life as the reader knows life to be or, it may be, feels life to be. And I mean the adult, the grown-up reader. Such a reader has outgrown fairy tales, and we do not want the fantastic and the impossible. So I say to you that a novel must stand up to the adult tests of reality.”
—Elizabeth Bowen (1899–1973)