Nitriding of titanium alloys at the atmospheric pressure of nitrogen

Maksimovich, G. G.; Fedirko, V. М.; Pogrelyuk, I. N.

doi:10.1007/bf01151889

Cited by 7 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, the kinetics of the diffusion process of nitriding have been studied by several research groups [46][47][48][49]. The high nitriding rate, in this work, can be explained according to Raaif et al conception [50] which combines the diffusion mechanism reported by Malinov et al [51] with the microcrack mechanism reported by El-Hossary [52].…”

Section: Microstructure Analysismentioning

confidence: 89%

Tribo-mechanical and electrochemical properties of plasma nitriding titanium

El-Hossary

Negm

El-Rahman

et al. 2015

Surface and Coatings Technology

View full text Add to dashboard Cite

Section: Microstructure Analysismentioning

confidence: 89%

Tribo-mechanical and electrochemical properties of plasma nitriding titanium

El-Hossary

Negm

El-Rahman

et al. 2015

Surface and Coatings Technology

View full text Add to dashboard Cite

“…The formation of nitrided layers in titanium alloys is a complicated process and involves several reactions taking place simultaneously at the boundary between the gas and the metal. The kinetics of the diffusion process has been studied by several research groups [14][15][16][17]. A simplified physical model for the formation and growth of nitrided layers during gas nitriding in titanium has been suggested by [18].…”

Section: Microstructure Of the Nitrided Layers Of Ti-6al-4v Alloymentioning

confidence: 99%

Surface treatment of Ti–6Al–4V alloy by rf plasma nitriding

Raaif

El-Hossary

Negm

et al. 2007

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

The Ti–6Al–4V alloy was treated by inductively coupled rf plasma nitriding. The effects of plasma-processing time in the range of 5–35 min on the microstructure and the mechanical properties of the plasma-nitrided Ti–6Al–4V samples were studied. The plasma power input was adjusted at 450 W and pure N2 gas was introduced to establish a treatment pressure of 8.0–8.4 × 10−2 mbar. The characteristics of the nitrided layers have been investigated by microhardness testing, surface roughness measurements, optical microscopy, and x-ray diffraction. The results show that the surface microhardness increases as the plasma-processing time increases to reach 2000 HV0.1 at a plasma-processing time of 35 min. A high nitriding rate of 2.81 µm2 s−1 at a plasma-processing time of 25 min was achieved. The formation of the hard phases TiN, Ti2N, and Ti(N) in the Ti–6Al–4V surfaces are found to be the reason for the increased microhardness. Surface energy, yield strength and Young’s modulus for the nitrided Ti–6Al–4V alloy were calculated from the Vickers microhardness data.

show abstract

“…The mechanisms and kinetics of the formation and growth of laser surface nitrided layers in titanium alloys have been studied by several research groups (Fedirko and Pogrelyuk, 1984; Maksimovich et al , 1987a, b, 1989; Metin and Inal, 1989; Bars et al , 1983; Malinov et al , 2002). TiN formation due to the reaction between nitrogen and laser melted titanium was described in all of these research studies.…”

Section: Microstructure Of the Laser Nitrided Layers Of Titanium Alloysmentioning

confidence: 99%

A review of the corrosion of laser nitrided Ti‐6Al‐4V

Razavi

Gordani

Man

2011

Anti-Corrosion Methods and Materials

View full text Add to dashboard Cite

PurposeThe purpose of this paper is to consider the corrosion properties of laser nitrided Ti‐6Al‐4V alloys that have been reported previously by several researchers.Design/methodology/approachDifferent kinds of surface nitriding methods of titanium alloys, such as plasma nitriding, ion nitriding, gas and laser nitriding, are introduced. Microstructure changes, such as phase formation and the influence of laser processing parameters in laser nitriding layers of Ti‐6Al‐4V alloys, were investigated using scanning electron microscope, transmission electron microscope, X‐ray photo‐electron spectroscopy, and X‐ray diffraction. Based on investigations presented in the literature, the effect of laser nitriding on the corrosion behavior of Ti‐6Al‐4V alloy was reviewed.FindingsBy regulating the laser processing parameter, the microstructure of the nitrided layer can be controlled to optimize corrosion properties. This layer improves corrosion behavior in most environments, due to the formation of a continuous TiNxOy passive film, which can retard the ingress of corrosive ions into the substrate and can maintain a constant value of a current density. Therefore, the laser gas nitrided specimens have a relatively noble corrosion potential and a very small corrosion current, as compared to untreated specimens.Originality/valueThis paper comprises a critical review, and its collection of references is useful. It summarizes current knowledge in laser surface treatment research.

show abstract

Nitriding of titanium alloys at the atmospheric pressure of nitrogen

Cited by 7 publications

References 2 publications

Tribo-mechanical and electrochemical properties of plasma nitriding titanium

Tribo-mechanical and electrochemical properties of plasma nitriding titanium

Surface treatment of Ti–6Al–4V alloy by rf plasma nitriding

A review of the corrosion of laser nitrided Ti‐6Al‐4V

Contact Info

Product

Resources

About