Nanodurezza e analisi chimica di un composito metal matrix con e senza trattamento termico processato mediante AM = Nanohardness and chemical analysis of a metal matrix composite with and without heat treatment processed by AM

The paper examines the performance characteristics of a material by analyzing hardness test data more especially the effect of different test parameters including, maximum load and penetration depth. Severity, which is another significant property defining materials’ ability to resist deformation, was quantified as GPa (GigaPascals) and HV (Vickers hardness). All the tests were performed with different samples, and the maximum applied loads ranged from 24. 49mN to 24. 81mN, and the depth of penetration from 0. 50µm to 0. 86µm. These conditions influenced the hardness readings from 82. 37 GPa to 195. 87 GPa depending on the carbon nanotube attributes – in particular, diameter. The investigation also showed that higher maximum loads were associated with increased values of hardness as with the speculation that optimization of the loads increases material deformation and apparent hardness. Likewise, samples with greater penetration depths showed higher hardness values, It could be that increased interaction between the indenter and the sample could lead to precise measurements. It is clearly seen that there was a significant variance in the data; manually calculating the average hardness resulted in a figure of 140. 57 GPa with a standard deviation of 19. 38. Such variation increases the visibility of the non-uniform nature of materials’ hardness and the impact of testing environments on outcomes. Further analysis of the results of individual tests extended the correlation between the test conditions and hardness and the possibility to determine the behavior of the material under constant loading and different levels of penetration. The outcomes of the investigation demonstrate how the values of the maximum load and penetration depths impact the hardness measurements and, therefore, should be determined with the proper degree of caution. Thus, the present paper advances knowledge of mechanical properties of materials as well as offering data helpful to select materials for applications where certain hardness classes are necessary.