Wear behavior of Ti6Al4V biomedical alloys processed by selective laser melting, hot pressing and conventional casting

Bartolomeu, F.; Buciumeanu, M.; Pinto, E.; Alves, Nuno; Silva, Filipe; Carvalho, Ó.; Miranda, G.

doi:10.1016/s1003-6326(17)60060-8

Cited by 118 publications

(51 citation statements)

References 36 publications

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“…Gu et al [30] enhanced the hardness and wear performance of LAM-fabricated commercially pure Ti by obtaining fine α phases. Bartolomeu et al [31] obtained high hardness and wear resistance of Ti6Al4V using the selective laser melting process to achieve a refined microstructure. Nassar et al [32] reduced the width of α lath and improved the hardness of LAM-fabricated Ti6Al4V, using a pulsing laser beam.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Hardness and Wear Performance of Laser Additive Manufactured Ti6Al4V Alloy Through Achieving Ultrafine Microstructure

Song

Xie

et al. 2020

Materials

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Refining microstructure is an important issue for laser additive manufacturing (LAM) of titanium alloy. In the present work, the microstructures of LAM-fabricated Ti6Al4V alloy were refined using a low energy density with the combination of a small spot diameter, a low laser power, and a high scanning speed. The microstructure, hardness, wear performance, and molten pool thermal behavior of LAM-fabricated Ti6Al4V coatings were studied. The results show that the grain sizes of both prior β and α phases are strongly dependent on the cooling rate of the molten pool. The fine prior β grains and submicron-scale acicular α phases were obtained under a low energy density of 75 J mm−2 due to the high cooling rate of the molten pool. In addition, the as-fabricated Ti6Al4V sample with submicron-scale acicular α phase showed a very high hardness of 7.43 GPa, a high elastic modulus of 133.6 GPa, and a low coefficient of friction of 0.48. This work provides a good method for improving the microstructure and mechanical performance of LAM-fabricated Ti6Al4V alloy.

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Section: Introductionmentioning

confidence: 99%

Enhancing Hardness and Wear Performance of Laser Additive Manufactured Ti6Al4V Alloy Through Achieving Ultrafine Microstructure

Song

Xie

et al. 2020

Materials

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“…Due to this last change in the friction coe cient, and its constant behavior until the end of the analysis time, the rupture of the two coatings deposited is expected. Based on this rupture, the friction coe cient could be veri ed as similar to that mentioned in the literature for the Ti6Al4V substrate (μ 0.4) [53,54]. Figure 10(b) shows the images obtained in the SEM/FEG of the tracks on the coatings on which the wear tests were carried out and the YSZ balls used as a counterbody.…”

Section: Wear Resistancementioning

confidence: 65%

Effect of Sterilization on the Properties of a Bioactive Hybrid Coating Containing Hydroxyapatite

Baldin

Malfatti

Rodói

et al. 2019

Advances in Materials Science and Engineering

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The objective of this study was to evaluate the influence of sterilization on a hybrid coating obtained from a sol composed of alkoxysilane tetraethoxysilane (TEOS) and organoalkoxysilane methyltriethoxysilane (MTES) containing 10% (mass) of hydroxyapatite particles. The coating was obtained by dip coating, by applying two layers (protective/bioactive), which were cured at different temperatures (450°C and 60°C). The effects of sterilization on the superficial, electrochemical, bioactive, and mechanical properties of the coating were evaluated by performing different sterilization processes, namely, steam autoclave, hydrogen peroxide plasma, and ethylene oxide. Subsequently, the coating was characterized by using scanning electron microscopy (SEM/FEG), and FTIR measurements were performed to characterize the chemical structure. The bioactivity and degradability of the coating were analyzed by mass variation after immersion in SBF and X-ray diffraction (XRD) analysis. The electrochemical behavior was assessed by open circuit potential (OCP) and potentiodynamic polarization curves and the mechanical behavior by wear resistance. Results showed that all sterilization processes caused significant morphological changes in the hybrid coating. The autoclaved sample presented the highest structural chemical changes, and, consequently, the highest degradability, even though it had a superior bioactive behavior in relation to the other samples. In addition, the sterilization processes influenced the electrochemical behavior of the hybrid coating and altered the mechanical resistance to abrasion, thus presenting lower wear performance in relation to the nonsterilized sample.

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“…During sliding against WC, the Ti6Al4V alloy undergoes plastic deformation and the release of wear debris of Ti, Al, and V at the interface between the two materials causes severe abrasive wear, increasing the COF 2,19 . The oscillation between the minimum and maximum COF values is a typical third body effect 20 . The low COF for the DLC coating in dry sliding systems can be attributed to the transformation of the DLC into a graphite-like state, which is a lubricant material, as a result of the sliding action.…”

Section: Resultsmentioning

confidence: 99%

Wear behavior of Diamond-like Carbon Deposited on Ti6Al4V Prepared with Surface Mechanical Attrition Treatment

et al. 2019

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Surface modification by deposition of hard coatings is a way to overpass the poor wear resistance of some metallic materials and one potential material is the Diamond-Like Carbon (DLC). We investigated the wear behavior, and the adhesion of the DLC deposited on a Ti6Al4V (Ti64) alloy after Surface Mechanical Attrition Treatment (SMAT). The SMAT was applied using 100Cr6 steel balls, and the DLC was deposited through the sputtering method. The nano-hardness was evaluated using a MTS Nano Indenter XP. The adhesion of the DLC was evaluated using a CSM Revetest, and the wear tests were performed in a reciprocating linear tribometer from CSM Instruments. The mean wear rate for the Ti64 was 437x10-6 mm 3 /N/m against 5x10-6 mm 3 /N/m for the Ti64+SMAT+DLC. The SMAT reduced the wear rate of the DLC coating, showing that the SMAT might be a viable treatment with promising results regarding the DLC wear resistance.

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Wear behavior of Ti6Al4V biomedical alloys processed by selective laser melting, hot pressing and conventional casting

Cited by 118 publications

References 36 publications

Enhancing Hardness and Wear Performance of Laser Additive Manufactured Ti6Al4V Alloy Through Achieving Ultrafine Microstructure

Enhancing Hardness and Wear Performance of Laser Additive Manufactured Ti6Al4V Alloy Through Achieving Ultrafine Microstructure

Effect of Sterilization on the Properties of a Bioactive Hybrid Coating Containing Hydroxyapatite

Wear behavior of Diamond-like Carbon Deposited on Ti6Al4V Prepared with Surface Mechanical Attrition Treatment

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