Relations of counterface materials with stability of tribo-oxide layer and wear behavior of Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy

Wang, L.; Li, X.X.; Zhou, Yonglin; Zhang, Q.Y.; Chen, K.M.; Wang, S.Q.

doi:10.1016/j.triboint.2015.01.028

Cited by 28 publications

(17 citation statements)

References 27 publications

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“…Wang et al [82] suggested two distinct mechanisms of deformation for CP Ti and Ti64 (at low temperatures), viz., slip and twinning, respectively. The existence of ambiguity in the mechanisms associated with plastic deformation in Ti and its alloys throw light to the fact that in-depth microstructural analysis has to be carried out.…”

Section: Mechanisms Governing Tribo-behaviormentioning

confidence: 99%

Tribology of Ti6Al4V: A review

2019

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The deleterious innate attribute of Ti6Al4V, the workhorse material among the alloy series of titanium is its incompetent tribo-behavior. Infinite surface modification techniques, viz., the accretion of adherent appendage layers, diffusion hardening, infusion of residual stresses, microstructural evolution, and phase transformations were attempted to enhance the wear resistance of the alloy. The need lies to establish a bridge between the indigenous material properties and the tribo-characteristics of Ti6Al4V so that the enforced improvement techniques can raise the barriers of its applicability. A critical review of the microstructural transitions, mechanisms governing tribo-behavior and the parametric conditions leading to material removal at dry sliding conditions of Ti6Al4V, falls under the scope of this manuscript. Hence, the prime focus of the approach is to impart a clear-cut perception of the minute variations in mechanical, metallurgical, and tribological characteristics of the alloy at interactive instances with distinct counter-body surfaces.

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Section: Mechanisms Governing Tribo-behaviormentioning

confidence: 99%

Tribology of Ti6Al4V: A review

2019

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“…Our recent researches demonstrated that as the tribo-layer is a tribo-oxide layer, it is of a protective function. [11][12][13][14][15] However, as for the protective function, the comparison between tribo-oxide layer and the oxide coating has not been reported till now.…”

Section: Characterization Of the Oxide Coating And Various Tribo-oxidmentioning

confidence: 99%

“…The improvement of wear performance of Ti-6Al-4V alloy was proved to be attributed to the existence of tribo-oxide layers in our previous researches. [11][12][13][14][15] It can be considered that the differences of wear loss, as shown in Figure 2(c), were resulted from the respective function of the oxide coating and porous tribo-oxide layers. This result demonstrated that the oxide coating presented slightly better wear resistance than porous tribo-oxide layers.…”

Section: Comparison Of Wear Performance For the Oxide Coating And Varmentioning

confidence: 99%

“…Low protective function of tribo-oxides was considered to be a significant factor resulting in poor tribological performance of titanium alloys, which was confirmed by most researchers. [6][7][8][9][10] However, in our recent works, [11][12][13][14][15] titanium alloys were found not to always possess poor wear resistance. At 400-600 C, titanium alloys presented extremely low wear rates, in which tribo-oxides were considered to provide a full protection.…”

Section: Introductionmentioning

confidence: 99%

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Comparative research on the effect of an oxide coating and a tribo-oxide layer on dry sliding wear of Ti–6Al–4V alloy

Zhou

Wang

Chen

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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The effect of an oxide coating and a tribo-oxide layer on dry sliding wear of Ti-6Al-4V alloy was comparatively studied. The oxide coating was prepared on Ti-6Al-4V alloy by a thermal oxidation/diffusion process; the tribo-layer was an in situ produced mechanically mixed layer during dry sliding. The oxide coating markedly improved the wear performance of Ti-6Al-4V alloy at room and elevated temperatures. Tribo-layers were classified into three types: no-oxide tribo-layer, porous, and dense tribo-oxide layers. Both porous and dense tribo-oxide layer presented protective function, thus significantly improving wear performance of Ti-6Al-4V alloy. However, no other than dense tribo-oxide layer was qualified to be comparable to the oxide coating, which almost possessed the same wear-reduced function as the oxide coating. Even when the oxide coating was severely delaminated, the tribo-oxide layer would replace the oxide coating and took effect to protect from wear.

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“…As can be seen in Figure 7c,d, sample c has greater degree of TiO bonding compared to sample b and therefore, forms a greater TiO tribo-oxide layer which is believed to be the main reason of poorer wear resistance in Ti-based alloys. It is considered that this tribo-oxide is not adherent to the substrate, is also brittle and tends to be fragmented, and therefore does not have any protective role during machining [46,47]. Although, at temperatures above 600 • C tribo-oxides can play a protective role [46], since machining in this study was performed at temparatures below 300 • C, it is most probably the formation of greater amounts of Ti-O tribo-phase in sample c causes a poor wear performance (more intensive sticking of Al on the rake face) than found in sample b.…”

Section: Xps Analysismentioning

confidence: 99%

Hybrid Ti-MoS2 Coatings for Dry Machining of Aluminium Alloys

et al. 2017

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Combinatorial deposition, comprising filtered cathodic vacuum arc (FCVA) and physical vapor deposition (PVD) magnetron sputtering is employed to deposit molybdenum disulphide (MoS 2 ) and titanium (Ti) thin films onto TiB 2 -coated tool inserts specifically designed for the dry machining of aluminium alloys. Titanium is deposited by FCVA while MoS 2 is magnetron sputtered. The deposition set up allows several compositions of Ti-MoS 2 to be deposited simultaneously, with Ti content ranging between 5 and 96 at. %, and their machining performances to be evaluated. Milling took place using a CNC Vertical Machining Center at a 877 mm/min feed rate. The effect of different coating compositional ratios on the degree of aluminium sticking when a milling insert is used to face mill an Al alloy (SAE 6061) was investigated using a combination of energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) analysis. XPS studies suggest that the greater degree of Al sticking on the rake face of the inserts is due to the formation of greater amounts of non-protective Ti-O phases. EDX mapping of the milling inserts after machining reveal that a Ti:MoS 2 ratio of around 0.39 prevents Al from sticking to the tool edges. Since we prevent Al from sticking to the tool surface, the resultant machined surface finish is improved thus validating the machining performance of TiB 2 -coated tools using optimum compositions of Ti:MoS 2 thin film coatings.

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Relations of counterface materials with stability of tribo-oxide layer and wear behavior of Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy

Cited by 28 publications

References 27 publications

Tribology of Ti6Al4V: A review

Tribology of Ti6Al4V: A review

Comparative research on the effect of an oxide coating and a tribo-oxide layer on dry sliding wear of Ti–6Al–4V alloy

Hybrid Ti-MoS2 Coatings for Dry Machining of Aluminium Alloys

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