Plasma-assisted boriding of pure titanium and TiAl6V4

Characteristics and wear performance of borided Ti6Al4V alloy

“…3, Ti 3 B 4 was not detected by the XRD analysis in accordance with the results of previous studies [11][12][13][14][15][16][17][18][19][20]. The peaks of α and β titanium also appeared on the XRD pattern.…”

“…It should be noted that the main alloying elements (Al and V) of the examined alloy were not detected up to depths of about 12 μm towards the interior. Previously Kaestner et al [12] attributed this observation to the displacement of Al and V beyond boride layer. As can be seen in Fig.…”

“…The cross-section SEM micrographs along with the results of EDX analysis and XRD pattern of the borided alloy are given in Table 1 The characteristics of Ti and Ti6Al4V alloy surfaces after diffusional boriding techniques Authors Boriding technique Base Metal Surface Layer Hardness Brandstötter and Lengauer [11] Pack Ti TiB and TiB 2 Kaestner et al [12] Plasma-assisted Ti and Ti6Al4V TiB and TiB 2 2800 HK Anthymidis et al [13] Fluidized bed Ti6Al4V TiB and TiB 2 Aich and Ravichandran [14] Pack Ti TiB whiskers 550 HV Anthymidis et al [15] Fluidized bed Ti and Ti6Al4V TiB and TiB 2 Tsipas et al [16] Fluidized bed Ti and Ti6Al4V TiB and TiB 2 1925 HV Prytula et al [17] Pack Ti TiB and TiB 2 1440 HV He et al [18] Pack Ti TiB, TiB 2 and TiC 820 HV Tikekar et al [19] Pack Ti6Al4V TiB 2 3200 HV Lee et al [20] Pack Ti6Al4V TiB 2 3300 HV Figs. 1 and 2, respectively.…”

“…Even though titanium borides exhibit excellent combination of hardness and wear resistance in many tribological systems, only a few publications exist on boriding of titanium and titanium alloys as an alternative diffusion technique [11][12][13][14][15][16][17][18][19][20]. Table 1 presents the characteristics of Ti and Ti6Al4V alloy surfaces after diffusional boriding.…”

Improving the Adhesion Resistance of the Boride Coatings to AISI 316L Steel Substrate by Diffusion Annealing

“…Poor adhesion leads to flaking (adhesive failure), whereas poor cohesion causes chipping (cohesive failure) ( Ref 9). Based on the aforementioned, the scratch test has been used to assess the practical adhesion resistance of different types of boride coating/substrate systems such as TiB 2 /Ti, TiB-TiB 2 /TiAl 6 V 4 , and FeBFe 2 B/low-carbon steel for quality assurance (Ref [10][11][12]. A first attempt to estimate the practical adhesion resistance of the FeBFe 2 B/low-carbon steel system was proposed by Allaoui et al…”