Optimization of duplex coatings built from nitriding and ion plating with continuous and discontinuous operation for construction and hot working steels

Dingremont, N.; Bergmann, E.; Collignon, P.; Michel, H.

doi:10.1016/0257-8972(94)02350-6

Cited by 48 publications

(12 citation statements)

References 10 publications

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“…As with most surface treatment techniques, the thin layer of nitride rich layers are not free of pores or cracks that provide avenues of attack on the substrate and lead to pitting and finally delamination. Comparison of the corrosion resistance of different steel grades nitrided, coated, and given duplex treatment was carried out by Dingrement et al [12]. They showed that the duplex treatments improved the corrosion resistance of construction and hot working steel impressively when compared with nitriding or PVD coating.…”

Section: Introductionmentioning

confidence: 99%

Laser Assisted Nitriding of Ti-6Al-4V Alloy: Metallurgical and Electrochemical Properties

Yilbaş

Khalid

Shuja³

1999

Chem. Eng. Technol.

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The surface properties of Ti-6Al-4Valloy, such as wear resistance, are inadequate for many applications. To improve the surface properties of the alloy, many techniques have been considered. One of the promising techniques is to form a nitride layer on the surface of the workpiece by a laser beam. In the present study, laser assisted nitriding of the Ti-6Al-4Valloy surface is carried out under a nitrogen gas flow environment. A CO 2 laser is used to irradiate the Ti-6Al-4Valloy surface while nitrogen is introduced co-axially with the laser beam onto the workpiece surface. The resulting surface cross section is examined metallurgically. SEM and XRD were carried out for material characterization. The study is extended to include the electrochemical response of the resulting surfaces. The surface morphology of the electrochemically treated workpieces are examined. It is found that in the laser treated region dendritic structures occur and TiN forms in the surface vicinity. The density of pit formation at the surface of the treated region reduces considerably.

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Section: Introductionmentioning

confidence: 99%

Laser Assisted Nitriding of Ti-6Al-4V Alloy: Metallurgical and Electrochemical Properties

Yilbaş

Khalid

Shuja³

1999

Chem. Eng. Technol.

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“…This phenomenon has given rise to development of duplex coatings. Nitriding to get hardened layer followed by PVD coating on steel and titanium alloy has given better results [34][35][36] Nanocrystalline materials are well known for improved hardness, yield strength and toughness. In recent times enhanced tribological performances of nano crystalline thin and thick coatings are reported [37,38].…”

Section: Plasticity Dominated Wearmentioning

confidence: 99%

Use of wear mechanism map to engineer surfaces for enhanced wear resistance

Roy

2009

Trans Indian Inst Met

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Material degradation due to unidirectional sliding wear can be found in wide range of engineering applications. Depending on the applied load and sliding velocity, several material removal mechanisms will be operative during sliding. Lim and Ashby compile these mechanisms in the form of wear mechanism map. They have also been able to estimate the wear rate in each mechanism quantitatively. However, no effort has hitherto been made to use these expressions and concepts to alter or modify the surfaces of various materials for improved wear performances. The objective of the present work is to address this issue. In this work, the expression for wear rate in various regimes will be examined critically. The important parameters that governs wear rate will be identified. An approach to improve wear rate in each regime will be suggested on the basis of identified parameters. Suggestions will be substantiated with large database and published work.

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“…Various factors that influence the functioning of this type of coating system have been suggested, such as an unfavorable stress state with the nitrided layer [10,11], extra precipitations along the hard coating-prenitriding layer [12][13][14], or black layer formation by denitriding [1,15,16]. It has recently been reported by the authors that substrate softening induced at higher treatment temperatures is as significant, if not more so, than the aforementioned factors to the overall mechanical performance of this type of duplex system [17].…”

Section: Introductionmentioning

confidence: 99%

“…Duplex coatings, consisting of a nitrided load support layer and a hard coating top layer, are now available on a mass production scale [1,2], and are in use, or being considered for use, in a wide range of applications [3][4][5][6][7][8][9]. Various factors that influence the functioning of this type of coating system have been suggested, such as an unfavorable stress state with the nitrided layer [10,11], extra precipitations along the hard coating-prenitriding layer [12][13][14], or black layer formation by denitriding [1,15,16].…”

Section: Introductionmentioning

confidence: 99%

In-service performance of components treated with plasma nitriding and arc ion plating duplex coatings

Lien

Wang

Chang

et al. 2007

Journal of Materials Processing Technology

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Optimization of duplex coatings built from nitriding and ion plating with continuous and discontinuous operation for construction and hot working steels

Cited by 48 publications

References 10 publications

Laser Assisted Nitriding of Ti-6Al-4V Alloy: Metallurgical and Electrochemical Properties

Laser Assisted Nitriding of Ti-6Al-4V Alloy: Metallurgical and Electrochemical Properties

Use of wear mechanism map to engineer surfaces for enhanced wear resistance

In-service performance of components treated with plasma nitriding and arc ion plating duplex coatings

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