“…This is followed closely by alloys such as Ti 86 Mo 8 Ta 6 and Ti 84.5 Mo 8 Zr 7.5 with values of 0.461 and 0.447, respectively. The result is in line with the results of Injeti et al [59,60] for the Ti–Nb–Zr alloy system with Nb/Zr 1 and Majumdar, P. et al [61] for heat-treated Ti-13Zr-13Nb alloys under similar stresses and conditions. Figure 4 (a) Friction coefficient and (b) wear rate of the binary Ti 92 Mo 8 , Ti 88 Mo 8 Nb 4 .…”
Section: Resultssupporting
confidence: 91%
“…This is followed closely by alloys such as Ti 86-Mo 8 Ta 6 and Ti 84.5 Mo 8 Zr 7.5 with values of 0.461 and 0.447, respectively. The result is in line with the results of Injeti et al [59,60] for the Ti-Nb-Zr alloy system with Nb/Zr 1 and Majumdar, P. et al [61] for heattreated Ti-13Zr-13Nb alloys under similar stresses and conditions. Thus, the higher volume of β phase as listed in Table 1, and compared in Table 2 resulted in rest of the alloys' apparent high serrated oscillation of COF, whereas the high volume of the soft martensitic α ′′ phase, which is more prone to shear under applied pressures may have operated as 'soft-shearing regime' may have been responsible for the low COF value [31,32].…”
Section: Friction Coefficient and Wear Resistant Ratesupporting
The tribological characteristics of Ti alloys containing beta stabilisers such as Mo, Nb, Ta, Zr, and Sn have seldom been explored despite their applicability for metallic biomaterials requiring good wear and surface degradation resistance. Using sliding wear contact, the influence of these alloying components on Ti-Mo biomedical alloys in simulated physiological fluid was examined. Microalloying influences microstructure, hardness, and wear. Nb-microalloyed samples with metastable -phase increased anti-wear and frictional resistance while keeping frictional resistance. Orthorhombic α ′′ phase-rich samples were the least wear resistance. The findings contribute to a better understanding of the interaction between Ti-based biomaterials' micro-alloying and their tribological properties. The stabilised TiMo (Nb,Ta, Zr, or Sn) alloys outperformed CP-Ti, the original Ti92Mo8, and the regularly used biomedical Ti6Al-4V alloys in terms of corrosion resistance. This indicates that alloying tuning may be used to enhance biomedical prosthesis and increase the service life of bio-implants and components.
“…This is followed closely by alloys such as Ti 86 Mo 8 Ta 6 and Ti 84.5 Mo 8 Zr 7.5 with values of 0.461 and 0.447, respectively. The result is in line with the results of Injeti et al [59,60] for the Ti–Nb–Zr alloy system with Nb/Zr 1 and Majumdar, P. et al [61] for heat-treated Ti-13Zr-13Nb alloys under similar stresses and conditions. Figure 4 (a) Friction coefficient and (b) wear rate of the binary Ti 92 Mo 8 , Ti 88 Mo 8 Nb 4 .…”
Section: Resultssupporting
confidence: 91%
“…This is followed closely by alloys such as Ti 86-Mo 8 Ta 6 and Ti 84.5 Mo 8 Zr 7.5 with values of 0.461 and 0.447, respectively. The result is in line with the results of Injeti et al [59,60] for the Ti-Nb-Zr alloy system with Nb/Zr 1 and Majumdar, P. et al [61] for heattreated Ti-13Zr-13Nb alloys under similar stresses and conditions. Thus, the higher volume of β phase as listed in Table 1, and compared in Table 2 resulted in rest of the alloys' apparent high serrated oscillation of COF, whereas the high volume of the soft martensitic α ′′ phase, which is more prone to shear under applied pressures may have operated as 'soft-shearing regime' may have been responsible for the low COF value [31,32].…”
Section: Friction Coefficient and Wear Resistant Ratesupporting
The tribological characteristics of Ti alloys containing beta stabilisers such as Mo, Nb, Ta, Zr, and Sn have seldom been explored despite their applicability for metallic biomaterials requiring good wear and surface degradation resistance. Using sliding wear contact, the influence of these alloying components on Ti-Mo biomedical alloys in simulated physiological fluid was examined. Microalloying influences microstructure, hardness, and wear. Nb-microalloyed samples with metastable -phase increased anti-wear and frictional resistance while keeping frictional resistance. Orthorhombic α ′′ phase-rich samples were the least wear resistance. The findings contribute to a better understanding of the interaction between Ti-based biomaterials' micro-alloying and their tribological properties. The stabilised TiMo (Nb,Ta, Zr, or Sn) alloys outperformed CP-Ti, the original Ti92Mo8, and the regularly used biomedical Ti6Al-4V alloys in terms of corrosion resistance. This indicates that alloying tuning may be used to enhance biomedical prosthesis and increase the service life of bio-implants and components.
“…Simulated Body Fluid (SBF) was used as the test solution. The detailed composition of SBF could be seen in reference [35]. After obtaining the open circuit potential (OCP), the potentiodynamic polarization curves were adopted within a potential window of OCP±200 mV.…”
Iron metal possesses good biocompatibility and excellent mechanical strength, though it degrades too slowly. In this work, selective laser melting (SLM) was applied to fabricate iron-manganese (Fe-Mn) biodegradable scaffold. Results shown Fe-Mn scaffold exhibited a uniform pore structure with a porosity of 66.72±2.3%, which highly matched with as-designed model. Phase analysis revealed Fe-Mn scaffold mainly contained α-Fe, martensitic and austenitic phases. Due to the potential difference among these different phases, galvanic corrosion occurred in Fe matrix. In addition, a small amount of Mn distributed at grain boundaries also contributed to the formation of galvanic corrosion. Thus, the corrosion rate increased from 0.09±0.02 mm/year to 0.23±0.05 mm/year. The scaffold exhibited suitable mechanical properties with a yield strength of 137±8.4 MPa, an ultimate strength of 221.7±10.9 MPa. Moreover, cell assays demonstrated its good cytocompatibility. Taking these positive results into consideration, SLM processed Fe-Mn scaffold was a promising material for bone repair application.
“…However, the major disadvantage of the Ti6Al4V alloy is its elastic modulus (~ 120 GPa), which is much higher than that of human bone . Also, the stress-shielding effect of Ti-6Al-4V titanium alloy due to the mismatch of the elastic modulus between live bone causes bone resorption [5]. Moreover, some studies noted that aluminium and vanadium ions released from the Ti6Al4V alloy causes damage to the nervous system [6][7].…”
The aim of this in-vitro study was to evaluate the influence of Ag[Formula: see text]-ion-coated conditions on the corrosion, tribocorrosion and antibacterial properties of Ti15Mo alloy. The mean wear volume losses of all test specimens after tribocorrosion test procedures were determined using a noncontact 3D profilometer. The specimens’ hardness, roughness values and microstructures were measured using the microhardness tester, surface profilometer, scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. The mean wear volume loss of 30-min Ag[Formula: see text]-ion-coated Ti15Mo alloy was lower than the other specimens. In this study, correlations between the hardness, surface roughness and wear volume loss were found to be significant. The PVD coating process enhanced the antibacterial activity of Ti15Mo alloy owing mainly to the formation of silver film on the substrates.
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