indentation hardness


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indentation hardness

[‚in‚den′tā·shən ¦hard·nəs]
(metallurgy)
The resistance of a metal surface to indention when subjected to pressure by a hard pointed or rounded tool. Also known as penetration hardness.
References in periodicals archive ?
Our paper examined the entire gamut of Flexidone performance specifications, from solubilising temperatures for various alkyl chain lengths to indentation hardness at low temperatures to cold flexibility thresholds.
Also, this results could also explain the many reports of indentation hardness (H = P/A) values being larger at small depths compared to large depths, often referred to as the indentation size effect.
The ball indentation hardness of the same TPU parts was measured conforming to DIN 53 456 with a HPK4/22 device by Kogel.
North America follows American Society for Testing and Materials (ASTM) standards, which are very close to ISO standards, says Samuel Low, chairman of the ASTM subcommittee on indentation hardness testing and a member of the National Institute for Standards and Technology (NIST) technical staff.
Comprehensive mechanical tests revealed that the TiN/TiSiN coatings have higher indentation hardness, higher critical load, and longer wear durability than the CrN/CrSiN coatings.
Loading force at 500 mN was applied in a progressively increasing in 15 seconds; following indices were determined: Martens hardness (HM), Martens hardness from the slope of the increasing force/indentation depth curve (HMs), indentation hardness (HIT), elastic intentation modulus ([E.
06 on Indentation Hardness Testing was in the process of revising E92 to lower the range to 200 g, which would put it well into the traditionally micro range," said Tobolski.
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.
The current study attempts to investigate whether or not the scratch resistance, in terms of scratch depth and scratch visibility, can be correlated with the conventional material characteristics, such as indentation hardness and crystallinity, in TPOs.
In other words, the degree of deformation of the surfaces is determined by the indentation hardness, and disruption of the material at contact points is dependent on the integral of the stress-strain relationship.