Zhu, "Influence of
indentation on the fatigue strength of carbonitrided plain steel," Advances in Materials Science and Engineering, vol.
* Measuring the mathematical correlation between durometer hardness at 23[degrees]C and DMA
indentation at 23[degrees]C (we measured a strong [0.91] correlation between the two data sets, leading to the conclusion that the
indentation test simulated well durometer hardness, and could be used to simulate hardness readings at 70[degrees]C);
Based on this method, Lee and Kwon [10] developed a new method to estimate residual stress by analysing the surface stress effect on contact pressure in terms of shear plasticity during depth-controlled
indentation. Comparison with the results of conventional saw-cutting tests showed that the
indentation test could be effectively and easily used for the assessment of residual stress.
The average of 20 indents produced a modulus of 2.28 GPa (SD = 0.005 GPa), adequately representing that of the material at 200 nm AFM
indentation given the low standard deviation.
A universal testing machine with 3 metric ton capacity servo controlled has been utilized for
indentation purpose.
Another category is to determine the material parameters from spherical
indentation by defining the representative strain and stress.
Thus, in the present article, a series of
indentation tests on sandstone specimens, using half-sized indenters with various spacings, was performed to investigate the dynamic
indentation characteristics for various s/p ratios.
In this work, we use linear theory of elasticity to develop a new correction to Sneddon's solutions [17] for a conical tip
indentation on thin layer, which could be used to improve the evaluation of the viscoelastic properties of flattened cell by nanoindentation.
On the other hand, fracture resistant coatings such as copper are easy to prepare (Figure 1(d); the applied load was lowered to obtain similar
indentation depth as in Figures 1(a)-1(c)), but such ductile materials are generally soft--3 GPa in the presented case--and offer limited wear protection.
Left:
indentation edge on sample with laser surface treatment using low density input energy (Ev).
Hardness is gauged using an optical microscope by measuring the average of two readings of the
indentation diameters at right angles.6
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).
