Formation of oxynitrides on titanium alloys by gas diffusion treatment

Yas’kiv, О. І.; Pohrelyuk, І. М.; Fedirko, V. М.; Lee, Dong Bok; Ткачук, О. В.

doi:10.1016/j.tsf.2011.04.219

Cited by 19 publications

(8 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, the third stage is the main treatment, i.e. nowadays thermodiffusion treatments (nitriding, carburizing) or shot peening treatments [3][4][5]. Another simple and cost-effective treatment is anodization, creating either a compact top film or a porous one, including numerous mesopores [6,7].…”

Section: Introductionmentioning

confidence: 99%

Surface integrity after pickling and anodization of Ti–6Al–4V titanium alloy

Vermesse

Mabru

Arurault

2013

Applied Surface Science

View full text Add to dashboard Cite

The surface integrity of Ti-6Al-4V titanium alloy was studied at different stages of surface treatments, especially pickling and compact anodization, through surface characteristics potentially worsening fatigue resistance. No significant changes of the equiaxe microstructure were detected between sample core and surface, or after the pickling and anodization steps. Surface hydrogen and oxygen superficial contents were found to remain unchanged. Roughness characteristics (i.e. R a , R z but also local K t factor) similarly showed only slight modifications, although SPM and SEM revealed certain random local surface defaults, i.e. pits about 400 nm in depth. Finally internal stresses, evaluated using X-ray diffraction, highlighted a significant decrease of the compressive internal stresses, potentially detrimental for fatigue resistance.

show abstract

Section: Introductionmentioning

confidence: 99%

Surface integrity after pickling and anodization of Ti–6Al–4V titanium alloy

Vermesse

Mabru

Arurault

2013

Applied Surface Science

View full text Add to dashboard Cite

show abstract

“…[19]. The formation of oxynitride layers on Ti with gas diffusion treatment has been also reported [20]. On the other hand, the EDS process can modify the original surface of as-received powder from TiO 2 to Ti nitrides in 128 μsec.…”

Section: Resultsmentioning

confidence: 88%

Surface Modification of Self-Consolidated Microporous Ti Implant Compacts Fabricated by Electro-Discharge-Sintering in Air

Yoon

Kim

et al. 2017

Archives of Metallurgy and Materials

View full text Add to dashboard Cite

A single pulse of 0.75-2.0 kJ/0.7g of atomized spherical Ti powders from 300 mF capacitor was applied to produce a microporous Ti implant compact by electro-discharge-sintering (EDS). A solid core in the middle of the compact surrounded by a microporous layer was found. X-ray photoelectron spectroscopy was employed to study the surface characteristics of the EDS Ti compact and it revealed that Ti, C and O were the main constituents on the surface with a smaller amount of N. The surface was lightly oxidized and was primarily in the form of TiO 2 resulting from the air oxidation during EDS processing. The lightly oxidized surface of the EDS compact also exhibited Ti nitrides such as TiN and TiON, which revealed that the reaction between air constituents and the Ti powders even in times as short as 128 msec.

show abstract

“…It should be noted that forming of these nitride layers gives new possibilities in surface engineering of titanium alloys, in particular, at the complex modification of surface layers by the interstitial elements (Pohreliuk et al, 2007;Pohrelyuk et al, 2009Pohrelyuk et al, , 2011Yaskiv et al, 2011;Fedirko et al, 2009). Thus, at thermocycling the nitriding process of titanium is intensified and reaches the maximum during processing in area of  transition.…”

Section: Nitriding Of Titanium Alloys At Thermocyclingmentioning

confidence: 99%