Influence of plasma nitriding on fretting wear behaviour of Ti–6Al–4V

Ali, Mubarak; Raman, S. Ganesh Sundara; Pathak, Dev S.; Gnanamoorthy, R.

doi:10.1016/j.triboint.2009.05.020

Cited by 58 publications

(13 citation statements)

References 28 publications

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“…With high strength after annealing among existing titanium alloys, it has excellent long-term work performance below 350°C (B10,000 h) [4]. Apart from their attractive mechanical properties, however, titanium alloys generally suffer from poor wear resistance [5]. As compared to extensive research performed on the microstructure and properties of Ti-5Al-5Mo-5V-1Cr-1Fe alloy, little attention has been paid to the sliding wear behavior of laser melting deposited Ti-5Al-5Mo-5V-1Cr-1Fe alloy.…”

Section: Introductionmentioning

confidence: 99%

Sliding wear behavior of laser-nitrided and thermal oxidation-treated Ti–5Al–5Mo–5V–1Cr–1Fe alloy fabricated by laser melting deposition

Liu

Shangguan

et al. 2016

Appl. Phys. A

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Sliding wear behavior of laser-nitrided and thermal oxidation-treated Ti-5Al-5Mo-5V-1Cr-1Fe (TC18) alloy fabricated by laser melting deposition (LMD) has been investigated to improve on wear resistance of laser melting deposited titanium alloy. The microstructure, wear morphology, hardness and wear rate were examined for the unmodified, laser-nitrided and thermal oxidationtreated LMD Ti-5Al-5Mo-5V-1Cr-1Fe alloy. As compared to a/b basket weave microstructure with fine lamellar a (hcp) observed on the unmodified LMD Ti-5Al-5Mo-5V-1Cr-1Fe alloy, Ti, Ti 2 N and TiN were formed on the LMD specimens after laser nitriding. After thermal oxidation, a surface layer composed of rutile TiO 2 was formed on the LMD specimens along with coarsening of a lath. The increase in hardness and wear resistance of the lasernitrided LMD Ti-5Al-5Mo-5V-1Cr-1Fe alloy is attributed to hard dendritic TiN formed on the specimens. The wear rate of the thermal oxidation-treated LMD specimens was \1 % of that of the unmodified LMD specimens when hardness of the former was twice as much as the latter. The superior sliding wear resistance of the thermal oxidationtreated LMD specimens is attributed to the presence of the lubricious rutile oxide layer and hardened diffusion zone.

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Section: Introductionmentioning

confidence: 99%

Sliding wear behavior of laser-nitrided and thermal oxidation-treated Ti–5Al–5Mo–5V–1Cr–1Fe alloy fabricated by laser melting deposition

Liu

Shangguan

et al. 2016

Appl. Phys. A

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“…14, 15. The volume loss of sample S4 produced at the lowest laser power is just 0.083 mm 3 , while the volume loss of the untreated titanium alloy Ti6Al4V is 1.72 mm 3 . For comparison, the volume loss of the pure titanium is exactly two times greater and equal to 3.44 mm 3 , as shown in Fig.…”

Section: Tribological Characteristicmentioning

confidence: 91%

“…Titanium and titanium alloys are characterized by excellent mechanical properties, high toughness, high strength and relatively low weight [1][2][3][4]. Moreover titanium shows great corrosion resistance in many environments, high biocompatibility, and also some titanium alloys show good heat resistance [2,5].…”

Section: Introductionmentioning

confidence: 99%

Tribological Characteristic of Titanium Alloy Surface Layers Produced by Diode Laser Gas Nitriding

Lisiecki¹,

Piwnik²

2016

Archives of Metallurgy and Materials

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In order to improve the tribological properties of titanium alloy Ti6Al4V composite surface layers Ti/TiN were produced during laser surface gas nitriding by means of a novel high power direct diode laser with unique characteristics of the laser beam and a rectangular beam spot. Microstructure, surface topography and microhardness distribution across the surface layers were analyzed. Ball-on-disk tests were performed to evaluate and compare the wear and friction characteristics of surface layers nitrided at different process parameters, base metal of titanium alloy Ti6Al4V and also the commercially pure titanium. Results showed that under dry sliding condition the commercially pure titanium samples have the highest coefficient of friction about 0.45, compared to 0.36 of titanium alloy Ti6Al4V and 0.1-0.13 in a case of the laser gas nitrided surface layers. The volume loss of Ti6Al4V samples under such conditions is twice lower than in a case of pure titanium. On the other hand the composite surface layer characterized by the highest wear resistance showed almost 21 times lower volume loss during the ball-on-disk test, compared to Ti6Al4V samples.

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“…The surface modification by the plasma nitriding or thermo-diffusion process is applied to improve the wear properties of the manufactured parts. Indeed, plasma nitriding of the Ti based alloys has been widely applied to improve the wear properties [1][2][3][4][5][6], and the achieved positive results lead us to expand its application in the surface treatment by the plasma nitriding of the prefabricated Ti film on the Cu alloys and Al alloys [7][8][9][10]. Unfortunately, the surface modification process by simple plasma nitriding process on the alloy substrate resulted in the weak bonding between the coating and the substrate, especially for the fabrication of thick coatings used in harsh environments.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Prefabricated Cu-Ti Film on the Microstructure and Mechanical Properties of the Multiphase Coating by Thermo Plasma Nitriding on C17200 Cu Alloy

et al. 2019

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To improve the surface wear resistance, plasma nitriding of the prefabricated Cu-Ti films on the C17200 Cu alloy is performed to investigate the effects of the composition of the Cu-Ti films on the microstructure and the mechanical properties of the modified surface. The results firstly showed that obvious microstructure evolution appeared during the thermo-plasma nitriding process, where both the surface morphology of the composed phases and the cross-sectional profiles of the multiphase coatings varied for the three types of films. Small amounts of Ti-N compounds, Be 3 Ti 2 Cu, and different types of Cu-Ti intermetallics formed in the multiphase coating after plasma nitriding, which is dependent on the composition of the prefabricated Cu-Ti film. Correspondingly, the surface hardness and the wear resistance of the C17200 Cu substrates were obviously improved, with the obtained adhesive strength of the substrate reaching a satisfactory range. Coatings 2019, 9, 694 2 of 15where the Cu-Ti intermetallics of varying Cu/Ti ratios and the Ti-N compounds of different Ti content were identified. The simulation results by the first-principle study also indicated the possibility for the formation of these phases and the possible contribution to the improvement of the surface mechanical properties [14,15]. However, the low efficiency of the surface modification process prompts us to propose the novel process by combination of the fabrication of a gradient Cu-Ti film and the plasma nitriding in our recent research, which shows great potentiality to produce the multiphase coating efficiently, with the obtained wear properties at the same level [16], which can also help to solve the problem of weak bonding strength between the single-layered Ti-N coating and the subsurface layer by the formation of Cu-Ti intermetallics between the Cu substrate and the Ti-N surface layer [8]. Actually, the Cu content in the prefabricated film should also contribute to the changing mechanical properties of the coating [17,18]. However, the previous investigations paid little attention to the influence of the initial Cu-Ti film composition on the obtained mechanical properties for the multiphase coating on C17200 Cu alloys.This paper discusses a further study on the effects of the prefabricated Cu-Ti film on the microstructure and mechanical properties of the multiphase coating by thermo plasma nitriding on C17200 Cu alloy. First, the microstructure and the surface characteristic of the prefabricated Cu-Ti film were studied. Then, the microstructure evolution during the plasma nitriding process was explored. Finally, the mechanical properties and the wear performance of the three types of coatings were evaluated. Materials and Methods Experimental Material and MethodThe chemical composition of the C17200 Cu alloy is listed in Table 1. The copper alloy bar was processed into a size of φ20 mm × 4.5 mm, by wire-cutting for the subsequent surface modification treatment, the structure analysis of the modified layer, and the mechanical performance tes...

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Influence of plasma nitriding on fretting wear behaviour of Ti–6Al–4V

Cited by 58 publications

References 28 publications

Sliding wear behavior of laser-nitrided and thermal oxidation-treated Ti–5Al–5Mo–5V–1Cr–1Fe alloy fabricated by laser melting deposition

Sliding wear behavior of laser-nitrided and thermal oxidation-treated Ti–5Al–5Mo–5V–1Cr–1Fe alloy fabricated by laser melting deposition

Tribological Characteristic of Titanium Alloy Surface Layers Produced by Diode Laser Gas Nitriding

Effects of the Prefabricated Cu-Ti Film on the Microstructure and Mechanical Properties of the Multiphase Coating by Thermo Plasma Nitriding on C17200 Cu Alloy

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