Improvement in fretting wear and fatigue resistance of Ti–6Al–4V by application of several surface treatments and coatings

Fu, Yong Qing; Loh, Nee Lam; Batchelor, Andrew W.; Liu, Daoxin; Zhu, Xiaodong; He, Jianyu; Xu, Ke

doi:10.1016/s0257-8972(98)00528-3

Cited by 104 publications

(34 citation statements)

References 17 publications

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“…For several years, attempts have been made to their sequential use, in particular to the connection of nitriding and PVD processes or shot peening and nitriding. Nitriding of steel and PVD coating deposition have been the subject of many publications [6][7][8][9] as shot peening and PVD coating deposition [10,11]. To ensure good adhesion of coatings to the substrate nitrided, the formation of so-called "white layer" of iron nitrides ε-Fe 2-3 N i c′-Fe 4 N [12] on the surface should be reduced or completely eliminated.…”

Section: Introductionmentioning

confidence: 99%

The Adhesion of CrN Thin Films Deposited on Modified 42CrMo4 Steel

Łupicka

Warcholiński

2017

Advances in Materials Science and Engineering

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Here, the e ect of adhesion of CrN hard coatings on modi ed 42CrMo4 steel substrate is presented. Modi cations of the substrate are shot peening, nitriding, shot peening, and nitriding joined process. In the shot peening process, two variable process parameters were used: exposure time (t) and air pressure (p). e nitriding process was conducted in the following parameters: nitriding potential N p � 4.86, nitriding time t n � 3 h, and temperature process T � 530°C. Modi ed substrates were characterized by surface hardness HV5 and hardness pro les on the cross section of samples and by surface roughness parameters. On such prepared substrates, the CrN coating was deposited. e adhesion of CrN coating on modi ed substrates was de ned by the scratch test. Chemical and phase composition of the lms was determined using EDS method and X-ray di raction, respectively. e surface hardness of deposited lms was also de ned. e substrate of 42CrMo4 steel without mechanical and heat treatment coated by hard CrN lm was used as a reference.

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Section: Introductionmentioning

confidence: 99%

The Adhesion of CrN Thin Films Deposited on Modified 42CrMo4 Steel

Łupicka

Warcholiński

2017

Advances in Materials Science and Engineering

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“…However, it is well known that the tribological performance of such materials in contact with counterface materials is extremely poor [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Evaluating the effects of plasma diffusion processing and duplex diffusion/PVD-coating on the fatigue performance of Ti–6Al–4V alloy

Cassar

Wilson²,

Banfield

et al. 2011

International Journal of Fatigue

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a b s t r a c tThe effect of triode-plasma enhanced low-pressure oxygen and/or nitrogen diffusion treatments, either as a single process or in conjunction with plasma-assisted physical vapour deposition (PAPVD) on Ti6Al-4V has been studied under rotating-bending fatigue testing. Following the diffusion treatment, samples exhibit a hardened case, more than 30 lm deep. Semi-logarithmic S-N plots are used to demonstrate and compare the significant changes in fatigue resistance obtained from each process. Fractography and residual stress measurements show that, compared to annealed samples, the fatigue strength of the diffusion-treated samples was superior; although the result changed depending on the processing parameters and microstructure of the substrate material. Also, unsupported and mechanically uncompliant ceramic coatings, such as TiN, promote the initiation of multiple crack sites, which lead to premature failure of the Ti-alloy substrate and a consequent reduction in endurance limit.

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“…Surface contact loads can result in rapid breakdown of the nascent oxide film, with consequent severe surface damage and seizure. Such poor tribological performance is generally attributed to several factors, including high chemical reactivity and a consequent high coefficient of friction [1], which results in seizure [2], galling [3] and fretting [4] damage. Also, the low hardness and shear modulus of (particularly) hcp titanium lead to a higher friction coefficient, metallic wear and adhesive transfer of material when subjected to sliding contact [5,6].…”

Section: Introductionmentioning

confidence: 99%

Tribological properties of duplex plasma oxidised, nitrided and PVD coated Ti–6Al–4V

Cassar

Banfield

Wilson³

et al. 2011

Surface and Coatings Technology

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Sequential triode plasma oxidation and nitriding have been used to provide enhanced load support for physical vapour deposited (PVD) hard coatings. The diffusion process has been designed to maximise process efficiency and coating adhesion, thereby significantly improving the tribological properties of the Ti-6Al-4V alloy -particularly at high contact pressures. This has been demonstrated using unlubricated linear reciprocating-sliding ball-on-plate wear tests and micro-scratch adhesion testing. Also, surface microprofilometry, nano/micro-indentation hardness testing, scanning electron microscopy (SEM), energydispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and glow-discharge optical emission spectroscopy (GDOES) data are presented to corroborate the effect of the several plasma diffusion processes and duplex diffusion/coating combinations discussed here. The results presented show that the novel processing technique developed permits the use of oxygen diffusion in order to obtain relatively large case depths in shorter treatment times without compromising the adhesion strength of subsequently deposited PVD layers.

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Improvement in fretting wear and fatigue resistance of Ti–6Al–4V by application of several surface treatments and coatings

Cited by 104 publications

References 17 publications

The Adhesion of CrN Thin Films Deposited on Modified 42CrMo4 Steel

The Adhesion of CrN Thin Films Deposited on Modified 42CrMo4 Steel

Evaluating the effects of plasma diffusion processing and duplex diffusion/PVD-coating on the fatigue performance of Ti–6Al–4V alloy

Tribological properties of duplex plasma oxidised, nitrided and PVD coated Ti–6Al–4V

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