Thermochemical surface treatment of titanium and titanium alloy Ti6Al4V by low energy nitrogen ion bombardment

Rie, K.‐T.; Lampe, Th.

doi:10.1016/0025-5416(85)90349-0

Cited by 101 publications

(25 citation statements)

References 6 publications

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“…High corrosion resistance, excellent wear and friction resistance are desired because the properties must be similar to those of natural bone. To improve the wear resistance of titanium and its alloys, they are subjected to various surface treatments such as thermal spraying, plasma vapour deposition processes, anodic oxidation, ion implantation, glow discharge nitriding and laser treatment [3][4][5]. In the present study, a relatively new method of applying penetrative coatings on Ti-48Al-2Cr-2Nb (at%) substrate, named pulsed plasma electrolysis, was used [6,7].…”

Section: Introductionmentioning

confidence: 99%

Pulsed nanocrystalline plasma electrolytic carburising for corrosion protection of a γ-TiAl alloy

Aliofkhazraee

Rouhaghdam

2008

Journal of Alloys and Compounds

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A number of studies have been reported on the use of plasma electrolytic carburising technology for surface hardening of different metals for higher corrosion and wear resistance resulted from this technique. However, very few have focused on the optimization of the pulsed nanocrystalline plasma electrolytic carburising process parameters. In this study, a design of experiment (DOE) technique, the Taguchi method, has been used to optimize the pulsed nanocrystalline plasma electrolytic carburising, not only for surface hardening but also for the corrosion protection of Ti-48Al-2Cr-2Nb (at%) titanium alloy by controlling the coating process's factors. The experimental design consisted of four factors (glycerol concentration, electrical conductivity of electrolyte, applied voltage and duration of process), each containing three levels. All experiments were done under constant frequency and duty cycle of rectangular shape pulse current method. Pure aluminum and titanium carbides were detected by XRD on the surface of the treated samples. Tafel polarization measurements were carried out to determine the corrosion resistance of the coated samples. The results were analyzed with related software. An analysis of the mean of signal-to-noise (S/N) ratio indicated that the corrosion resistance of pulsed plasma electrolytic carburized Ti-48Al-2Cr-2Nb (at%) alloy was influenced significantly by the levels in the Taguchi orthogonal array. The optimized coating parameters for corrosion resistance are 1200 g/l for glycerol concentration, 360 mS/cm for electrical conductivity of electrolyte, 400 V for applied voltage, 30 min for treatment time. The percentage of contribution for each factor was determined by the analysis of variance (ANOVA). The results showed that the applied voltage is the most significant factor affecting the corrosion resistance of the coatings.

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Section: Introductionmentioning

confidence: 99%

Pulsed nanocrystalline plasma electrolytic carburising for corrosion protection of a γ-TiAl alloy

Aliofkhazraee

Rouhaghdam

2008

Journal of Alloys and Compounds

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“…Similar investigations have been made for pure titanium [12]. Rie and Lampe [13] reported nearly 1500-1700 HV0.025 for titanium and titanium alloys nitrided using a low energy ion bombardment. Czarnowska et al achieved 1700-1900 HV0.05 using glow discharge nitriding and carbonitriding of titanium alloy [14].…”

Section: Microhardness Measurementsmentioning

confidence: 63%

Influence of rf-power on the plasma carbonitriding of titanium

Raaif

El-Hossary

Negm

et al. 2008

Materials Science and Engineering: A

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“…High corrosion resistance, excellent wear and friction resistance are desired because the properties of the metals must be similar to those of natural bone. To improve the wear resistance of titanium and its alloys, they are subjected to various surface treatments, such as thermal spraying, plasma vapour deposition processes, anodic oxidation, ion implantation, glow discharge nitriding and laser treatment [3][4][5]. In the present study, a relatively new method of applying penetrative coatings on Ti-48Al-2Cr-2Nb substrate, named pulsed plasma electrolysis, was used [6,7].…”

Section: Introductionmentioning

confidence: 98%

Study of bipolar pulsed plasma electrolytic carbonitriding on nanostructure of compound layer for a gamma Ti-Al alloy

Mahmood

Rouhaghdam

Roohzendeh

2008

Front. Mater. Sci. China

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The surface hardening of a gamma Ti-Al alloy by using bipolar pulsed nanocrystalline plasma electrolytic carbonitriding has been studied in this investigation. Coating process was performed on a triethanolaminebased electrolyte by a cooling bath. The nanostructure of the obtained compound layer was examined with the figure analysis of the scanning electron microscopy (SEM) nanographs. The effects of the process variables, i.e., frequency, temperature of the electrolyte, applied voltage and treatment time, have been experimentally studied. Statistical methods were used to achieve the optimum size of the nanocrystals. Finally, the contribution percentage of the effective factors of the pulsed current was revealed, and the confirmation run showed the validity of the obtained results.

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Thermochemical surface treatment of titanium and titanium alloy Ti6Al4V by low energy nitrogen ion bombardment

Cited by 101 publications

References 6 publications

Pulsed nanocrystalline plasma electrolytic carburising for corrosion protection of a γ-TiAl alloy

Pulsed nanocrystalline plasma electrolytic carburising for corrosion protection of a γ-TiAl alloy

Influence of rf-power on the plasma carbonitriding of titanium

Study of bipolar pulsed plasma electrolytic carbonitriding on nanostructure of compound layer for a gamma Ti-Al alloy

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