Alloying element contents, quenching and tempering temperatures were selected as input; hardness, tensile and yield strength were set as output parameters.
The independent factors selected were tablet hardness (X1), disintegrant (X2) and lubricant (X3) levels, and responses chosen were disintegration time (DT, Y1), friability (Y2), T50 (Y3), and T90 (Y4).
For example, if the shaft of water pump is selected of high hardness, low weld ability then when it will be worn out after a long service life then machinability of that shaft to repair it will be difficult and weld ability to fill the cracks will be difficult, so material selection with respect to repair ability is of great importance to designers.
Optimal cutting parameters were selected according to workpiece hardness from reference catalog and kept for all tests.
In order to study the effects of the feedstock powder on the coatings microstructures and hardness, the selected starting powders differed not only in microstructural features such as size and morphology but also in the chemistry and phases.
Berea sandstones were selected due to the hardness of its quartz grains bounded by silica.
This led to similar hardness values for the deposited MMC coatings (400 kg/mm2) despite the difference in hardness of the selected reinforcing carbides.
It was established that glass ceramic coating formed on TIMETAL 834 essentially improves the alloy selected properties, e.g. its hardness and high temperature oxidation resistance.
Furthermore, the deposited metal oxide-phases and selected mechanical properties, like the hardness and elastic-modulus (measured by nanoindentation) will be discussed.
By comparing different models for hardness analysis, we selected the most appropriate one allowing the calculation of the macrohardness taking into account the influence of roughness, porosity and cracks.
