Plasma assisted nitridation of Ti-6Al-4V

Fouquet, V.; Pichon, L.; Drouet, M.; Straboni, A.

doi:10.1016/s0169-4332(03)00889-4

Cited by 106 publications

(56 citation statements)

References 16 publications

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“…At these treatment conditions, the Ti 2 N(101) and Ti 2 N(200) planes are of lower intensity but still mostly favoured by these processing conditions, indicating that, following this treatment, the surface is mostly composed of ε-Ti 2 N. One would expect the high temperature treatment to exhibit the largest concentrations of TiN and Ti 2 N. However the 900 1C, 2 h processing conditions are compromised by the short exposure time such that nitrogen diffusion treatments at 700 1C, 48 h followed by 800 1C, 4 h exhibit the next largest peaks. Similar observations have been reported by Fouquet et al [22] for plasma nitriding processes.…”

Section: Resultssupporting

confidence: 91%

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Evaluating the effects of PIRAC nitrogen-diffusion treatments on the mechanical performance of Ti–6Al–4V alloy

Bonello

Wilson

Housden

et al. 2014

Materials Science and Engineering: A

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a b s t r a c tPowder Immersion Reaction Assisted Coating (PIRAC) is a relatively simple nitrogen diffusion based process which has been proposed as a technique capable of considerable improvements in the tribological performance of ceramics and metals alike; however, the necessary exposure of the substrate material to high temperatures for several hours may have an adverse effect on the bulk properties of materials such as titanium alloys. The effect of PIRAC treatments on the bulk metallography and mechanical properties of Ti-6Al-4V has been studied. Following PIRAC nitrogen-diffusion treatment, studies using X-ray diffraction and cross-sectional microscopy have shown evidence of the formation of a thin ( $ 1.4 mm) TiN/Ti 2 N layer, together with the presence of some Ti 3 Al intermetallic phase. Semilogarithmic S-N plots show a deleterious effect after PIRAC treatment in terms of material cyclic fatigue strength, particularly at higher treatment temperatures. Samples processed at 800 1C for 4 h however exhibit better fatigue performance than others treated at lower temperatures for longer nitriding times. Fractographic inspection has shown that fatigue cracks originate at (or near) the surface for the untreated Ti-alloy and from the subsurface regions following diffusion treatment, owing to the build-up of compressive stresses in the latter, which hinder crack propagation.

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Section: Resultssupporting

confidence: 91%

“…Table 3 shows that the material hardness increases with treatment temperature and duration. This is in accordance with the study carried out in [22] for a similar nitriding process. Measured hardness values depend on the compound layer characteristics, including thickness and phase composition.…”

Section: Hardness Testingsupporting

confidence: 93%

Evaluating the effects of PIRAC nitrogen-diffusion treatments on the mechanical performance of Ti–6Al–4V alloy

Bonello

Wilson

Housden

et al. 2014

Materials Science and Engineering: A

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“…Plasma nitriding by glow discharge is an important process to improve surface properties of these alloys [1][2][3][4][5][6]. Some questions remain about the dependence of surface properties on nitriding parameters.…”

Section: Introductionmentioning

confidence: 99%

Hardness evaluation, stoichiometry and grain size of titanium nitride films obtained with plasma nitriding on Ti-6Al-4V samples

2010

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Titanium nitride films were formed on the surface of Ti-6Al-4V discs by plasma nitriding (glow discharge) in different N 2 :H 2 atmospheres at several substrate temperatures. In this study the influence of the process parameters on dynamic micro-hardness were investigated. Grain sizes of the nitride films, determined with X-Ray Diffraction, were related to the nitriding parameters. TiNx stoichiometry was determined with Nuclear Reaction Analysis and showed a correlation to substrate temperature during the nitriding process. Micro-hardness measurements were taken on the nitrided surfaces. Grain sizes increased for a particular gas composition of 60%N 2 +40%H 2 where hardness was lowest.

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“…The phase ( P and S ) has a hcp structure while the phase is bcc. The nitridation of the surface has been performed at 600°C during 6 hours in a plasma-4 base ion implantation system described in previous papers [28,29]. The final microstructure is illustrated with the TEM cross-sectional micrograph in Fig.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…The compound layer is about 500 nm thick and the diffusion layer a few micrometers thick (the penetration of nitrogen depends on the crystallographic orientation of -titanium grains [29]). Note that an additional layer of amorphous Si 3 N 4 lies above the compound layer.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

Preparation of H-bar cross-sectional specimen for in situ TEM straining experiments: A FIB-based method applied to a nitrided Ti–6Al–4V alloy

Castany

Legros

2011

Materials Science and Engineering: A

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To cite this version:P. Castany, Marc Legros. Preparation of H-bar cross-sectional specimen for in situ TEM straining experiments: a FIB-based method applied to a nitrided Ti-6Al-4V alloy. AbstractThe in situ tensile straining of cross-sectional specimens inside a TEM is intrinsically very difficult to perform despite its obvious interest to study interfaces of surface treated materials.We have combined a FIB-based method to produce H-bar specimens of a nitrided Ti-6Al-4V alloy and in situ TEM straining stage, to successfully study the plastic deformation mechanisms that are activated close to the nitrided surface in the Ti-based alloy.

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Plasma assisted nitridation of Ti-6Al-4V

Cited by 106 publications

References 16 publications

Evaluating the effects of PIRAC nitrogen-diffusion treatments on the mechanical performance of Ti–6Al–4V alloy

Evaluating the effects of PIRAC nitrogen-diffusion treatments on the mechanical performance of Ti–6Al–4V alloy

Hardness evaluation, stoichiometry and grain size of titanium nitride films obtained with plasma nitriding on Ti-6Al-4V samples

Preparation of H-bar cross-sectional specimen for in situ TEM straining experiments: A FIB-based method applied to a nitrided Ti–6Al–4V alloy

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