Surface engineering of a titanium alloy for tribological applications by nanosecond-pulsed laser

Kümmel, Daniel; Linsler, Dominic; Schneider, Reinhard; Schneider, Johannes

doi:10.1016/j.triboint.2020.106376

Cited by 26 publications

(20 citation statements)

References 43 publications

(50 reference statements)

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“…The increase in surface hardness is attributed to the combined effects of laser-induced thermal ablation and shock wave peening. During thermal ablation, the increased oxygen content in the remelted layer results in the surface hardening due to the oxygen diffusion in the liquid phase [50]. The oxygen distribution in Figure 2k,l also clarified the reconstruction of oxygen content.…”

Section: In-depth Microstructural Changes Of Un-treated and Lsped Sam...mentioning

confidence: 75%

Laser Shock Peening of Ti6Al4V Alloy with Combined Nanosecond and Femtosecond Laser Pulses

Sun¹,

Bai

et al. 2021

Metals

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Laser shock peening (LSP) with nanosecond or femtosecond laser pulses is applied to improve the mechanical properties of metallic materials. Thus, it is necessary to compare the effects of different processing methods on microstructure changes and property improvement. In this study, nanosecond LSP (NLSP), femtosecond LSP (FLSP), and LSP with combined nanosecond and femtosecond laser pulses (F-NLSP) are conducted on Ti6Al4V alloys to compare the surface morphologies, in-depth microstructures, and nanohardness changes. In FLSP, the peened surface is smooth, and the affected depth is limited near the peened surface. NLSPed and F-NLSPed samples present rough surfaces due to the severe ablation process. Small equiaxed grains with no preferred grain orientation are denser in F-NLSPed samples than that in NLSPed samples. Compared with NLSPed samples, the affected depth and amplitude of in-depth nanohardness are larger in F-NLSPed samples. This is attributed to the increased laser absorption of incident laser on the treated surface by femtosecond laser pulses. The results in this study show the effects of different LSP methods and provide chances in engineering potentials for material property improvements.

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Section: In-depth Microstructural Changes Of Un-treated and Lsped Sam...mentioning

confidence: 75%

Laser Shock Peening of Ti6Al4V Alloy with Combined Nanosecond and Femtosecond Laser Pulses

Sun¹,

Bai

et al. 2021

Metals

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“…The work of adhesion also plays a role in the "stickiness" of the two contacting bodies. Speculatively, the chemical bonding characteristics and therefore the intrinsic work of adhesion between the two bodies could be affected by the presence of oxygen just like interface energies [23,24,40]. However, such electronic effects are usually small and certainly not abrupt.…”

Section: Discussionmentioning

confidence: 99%

“…Several methods of introducing interstitial atoms were successful in reducing wear on titanium alloys, such as ion implantation [17][18][19] or thermochemical treatments like nitriding and carburizing [20][21][22]. Also laser-induced chemical changes in Ti6Al4V can lead to significant improvements in its tribological behavior [23,24]. It appears that adhesive wear can be avoided and wear volume reduced by more than two orders of magnitude.…”

Section: Introductionmentioning

confidence: 99%

Influence of Interstitial Oxygen on the Tribology of Ti6Al4V

2020

Self Cite

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Titanium alloys are used for their good mechanical and corrosion properties, but generally experience poor wear behavior. This can effectively be counteracted by a thermal oxidation treatment, reducing wear significantly. Employing a special sample preparation, we study the transition of tribological properties between thermally oxidized and bulk Ti6Al4V on a single sample. While oxygen signal intensity and hardness followed an exponential decay from the surface to bulk material, tribological results showed a step-like transition from low to high friction and wear with increasing distance from the surface. Low wear was associated with minor abrasive marks, whereas high wear showed as severe adhesive material transfer onto the steel counter body. Besides the mechanical property of hardness, also a change in fracture behavior by interstitial oxygen could influence the observed tribological behavior.

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“…Because of its usefulness, titanium and its alloys have been subjected to surface modification through various techniques to change their surface properties [7,8]. Surface structuring through laser irradiation of the titanium substrate modifies surface morphologies by creating multifunctional surfaces and changing a variety of material properties, including wetting [9][10][11], corrosion [4,12,13], tribological [14], antireflective [15], or bacterial adhesion qualities [16,17], among others. It is therefore important to conduct research to establish specific surface modifications of titanium and other materials for a specific application.…”

Section: Introductionmentioning

confidence: 99%

Surface Structuring of the CP Titanium by Ultrafast Laser Pulses

Ronoh,

Novotný,

Mrňa

et al. 2024

Applied Sciences

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Surface structuring by ultrafast lasers is a promising technique to modify surface-related properties of materials to tailor them for specific applications. In the present study, we experimentally investigated the laser structuring of commercially pure titanium (CP Ti) using ultrafast pulses to understand the role of the laser input parameters on the development of surface morphology, optical properties, surface chemistry, and wettability behaviour. The processed surfaces were characterized by a scanning electron microscope, energy-dispersive X-ray spectroscopy (EDX), Raman microscope, optical microscope, and sessile drop method. Laser-induced periodic surface structures decorated with nanodroplets were noted to be formed on the surface of the laser-structured CP Ti. The surface roughness measurements showed that the laser-structured surfaces had nanoscale roughness values. The EDX and the Raman analyses show that laser-structured surfaces of CP Ti have a thin oxide film. Different colours on different surfaces processed by different laser parameters were observed. The wettability assessment shows that CP Ti can transition from hydrophilic–hydrophobic and vice versa depending on the environmental conditions. This study shows that laser structuring can be utilized to modify CP Ti surfaces to obtain desirable surface properties that can find potential applications in different fields.

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Surface engineering of a titanium alloy for tribological applications by nanosecond-pulsed laser

Cited by 26 publications

References 43 publications

Laser Shock Peening of Ti6Al4V Alloy with Combined Nanosecond and Femtosecond Laser Pulses

Laser Shock Peening of Ti6Al4V Alloy with Combined Nanosecond and Femtosecond Laser Pulses

Influence of Interstitial Oxygen on the Tribology of Ti6Al4V

Surface Structuring of the CP Titanium by Ultrafast Laser Pulses

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