Micro hardness
The micro hardness is a material parameter for different materials.
In the case of metals , the micro- hardness system is used to examine hardness values for individual structural components, in contrast to the macro-hardness, with which a hardness value is determined over the entire metallic matrix of a material. The Vickers hardness test method is mostly used for this.
In the case of elastomers , a needle with a point of 0.4 mm is pressed into the surface of the body and loaded with a force of 153.3 ± 1 mN, whereby only the hardness of the cover layer is determined. In this way it can be determined whether the surface has aged due to the action of chemicals or has been softened by detergents . The unit of microhardness is IRHD.
Web links
Individual evidence
- ↑ a b Foundry Lexicon: Micro Hardness ( Memento of the original from December 26, 2013 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. .
- ↑ Standard DIN EN ISO 4516 "Metallic and other inorganic coatings - micro hardness tests according to Vickers and Knoop.
- ^ O-ring test laboratory Richter: hardness test. May 1, 2014, accessed June 20, 2016 .
