Klecka, "Material-dependent representative plastic strain for the prediction of indentation hardness
," Acta Materialia, vol.
The resulting depth profiles of the indentation hardness
are presented in Figure 4.
In 1859, earliest forms of static indentation tests were introduced.4 Indentation tests are generally based on the formation of indentation on the surface of a metal or ceramic and hardness is established by gauging the perpetual depth of the indentation and the applied load.5 Generally, the indentation hardness
may be described in terms of plastic and, to a lesser extent, the elastic properties of the metal or ceramic concerned.
Figure 2a/b shows the Vickers Hardness HV (calculated from the indentation hardness
HIT) and the indentation modulus EIT of two coatings--a hard anodised coating (480 HV) of 11 [micro]m thickness (shown in red) and a soft anodised coating of 14 [micro]m thickness (shown in blue).
Both the modulus and indentation hardness
are highly dependent on the stiffness of contact, the contact area and the precision with which they are attached.
The resultant plots of indentation versus temperature or time can be used to measure indentation hardness
, elastic modulus, and creep as well as softening points and thermal expansion coefficients.
The hardness of PLLA/NA(A) was measured using plastic ball indentation hardness
If the filler is less resistant to penetration than the thermoset matrix, the filler will lower the indentation hardness
of the composite .
The indentation hardness
represents a measure of the average pressure under the indenter tip and is calculated from the force necessary to push a rigid indenter into the material.
"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.
1, micro indentation hardness
experiments of $355JR steel have shown the increase of indentation hardness
with the decrease of depth.