The phrase "average hardness of the" is correct and usable in written English.
It can be used in contexts where you are discussing the typical hardness measurement of a material or substance.
Example: "The average hardness of the mineral samples was determined using a standardized testing method."
Alternatives: "mean hardness of the" or "typical hardness of the".
Average hardness of the Co-based alloy/20% TiC/10% CaF2 (vol).
The average hardness of the a-C H is 13 GPa-C Hhout statistical significance of substrate influences.
The average hardness of the coating significantly increased with increasing loading rate, in contrast, it slightly decreased with holding time.
The average hardness of the coating was about HV0.1 360, which was about 5 times that of the pure copper.
The average hardness of the surface composite is about HV97, higher than the base metal is about HV80.
The average hardness of the foam cell wall was found to increase with the increase of foaming time regardless of the foaming temperatures and the alloy compositions.
The fatigue life was predicted with the model considering the characteristic geometry of inclusions, the average hardness of coating, and the effect of external stress.
The surface layer of single-pass-heated specimen has an average hardness of about 900 HV0.1, while the specimen treated with multipass shows an average hardness of about 700 HV0.1, because of the heat effect from the neighboring pass treating, compared with the substrate hardness of about 300 HV0.1.
Similar values of wall macrohardness and phase microhardnesses indicated that the amorphous phase is the main contributor to the average hardness of laser deposited metallic glass.
Before conducting experimental runs, the workpiece material was applied to heat treatment (quenching at 920 °C and tempering at 400 °C) to obtain an average hardness of 49 HRC, and later the exterior surface of the specimen was turned to remove the burr, oxide layers and other defaults.
The layer exhibited average hardness of about 883 HV with lesser variations in the hardness distribution and also higher wear resistance compared to the substrate.
