Surface microstructure of an IN718 3D coating manufactured by Laser Metal Deposition

Effect of the scanning strategy and tribological conditions on the wear resistance of IN718 obtained by Laser Metal Deposition

“…Although the fact that the scanning strategy does not affect the wear behavior, which is contradictory to Onuike et al [47], logical explanations of this result were found in this investigation. Figure 3 a) showed a highly heterogeneous microstructure at the mesoscale which leads to local hardness variation which would lead us to believe that the strategy could impact wear [35]. However, in our case, as the contact chosen is a large surface contact (around 3.14 mm²), it embraces a large number of grains.…”

“…Figure 3 summarizes the analyses performed on one of the LMD samples (LMD-0) and the wrought sample. The surface microstructure has already been studied in detail [35]. However, the most interesting features of this microstructure is described in the following paragraph.…”

Effect of the elevated temperature on the wear behavior of Laser Metal Deposition IN718 repairs

“…These two strategies are summarized in Figure 1b. Both samples have a density around 99.91 ± 0.04% [18].…”

“…The top microstructure of the samples has already been studied in detail in previous works [18]. However, for a proper interpretation of the results, some key characteristics are provided here.…”

“…Overall, the repairs show fine microstructures with a weak texture. The reader is invited to check the following article to learn more about the microstructural differences between the scanning strategies [18]. Furthermore, in this case, the same surface of the samples is loaded (the top surface).…”