Multi-pass scratch test behavior of modified layer formed during plasma nitriding

Yildiz, F.; Alsaran, Akgün

doi:10.1016/j.triboint.2010.02.005

Cited by 22 publications

(14 citation statements)

References 18 publications

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“…It can be seen that the corrosion resistance of untreated pure titanium is higher than that of the samples with plasma nitriding, because the nitrided surfaces have e-Ti 2 N phase. While the corrosion current density of untreated specimen is 414 3 10 29 A cm 22 , it is 450.33 3 10 29 A cm 22 for Ti_Nit.500 specimen, 790.33 3 10 29 A cm 22 for Ti_Nit.600 specimen and 619.5 3 10 29 A cm 22 for Ti_Nit.700 (Table 2). Moreover, when anodic polarization curves are examined, it is understood that nitrided specimens exhibit a better corrosion resistance than the untreated specimen up to average 1-V potential value.…”

Section: Electrochemical Analysismentioning

confidence: 98%

Effect of plasma nitriding treatment on structural, tribological and electrochemical properties of commercially pure titanium

Çelik

Karakan

2015

Proc Inst Mech Eng H

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In this study, plasma nitriding treatment was applied to commercially pure titanium (Grade 2). Structural properties, electrochemical and tribological behaviours of the nitrided pure titanium specimens were comparatively investigated. Microstructure and morphology of the plasma nitrided specimens were analysed by X-ray diffraction and scanning electron microscopy. Furthermore, corrosion tests were conducted in Ringer's solution, which represents a human body environment, to determine electrochemical properties. Then, tribological and frictional properties were investigated using pin-on-disc tribometer, and a micro-hardness tester was used to measure the hardness of the coatings. The results showed that plasma nitrided specimens exhibited higher surface hardness than the untreated specimens did. In addition, the plasma nitrided specimens at 700 °C presented significantly better performance than the other plasma nitrided specimens (at 500 °C and 600 °C) under dry wear conditions. Moreover, corrosion test results showed that corrosion behaviours of untreated and nitrided samples had similar characteristic.

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Section: Electrochemical Analysismentioning

confidence: 98%

Effect of plasma nitriding treatment on structural, tribological and electrochemical properties of commercially pure titanium

Çelik

Karakan

2015

Proc Inst Mech Eng H

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“…6,7 Among the available methods there are also tempering, nitriding, carbonitriding, cementation, and boriding stand out. [8][9][10][11][12][13][14][15] Different studies have demonstrated that plasma nitriding at relatively low temperatures (below 450 • C) can allow obtaining a surface layer of nitrides due to diffusion of nitrogen during this process, which results in an increase of the hardness and wear resistance. [16][17][18][19] Zappelino et al, 20 presented a higher dry sliding wear resistance in samples of cold work tool steel Vanadis 10, with a cryogenic treatment samples followed by plasma nitriding.…”

Section: Introductionmentioning

confidence: 99%

“…Heat treatment and titanium nitride (TiN) coating on AISI‐O1 cold work tool steel presented higher mechanical and wear resistance by Kumar et al 5 This thermal and thermochemical treatments stand out for increased resistance of tool base material 6,7 . Among the available methods there are also tempering, nitriding, carbonitriding, cementation, and boriding stand out 8‐15 …”

Section: Introductionmentioning

confidence: 99%

Effect of plasma nitriding time on the structural and mechanical properties of AISI‐O1 steel

Araújo

Ferreira

et al. 2020

Engineering Reports

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In this paper, the effect of plasma nitriding time on the improvement of surface microhardness of AISI O1 steel as a strategy to increase its wear resistance was addressed. The plasma nitriding was carried out in a controlled atmosphere (80% H 2(g) and 20% N 2(g)), temperature (500 • C), and pressure (6 mbar), during the different amount of time (4, 5, and 6 hours). The material was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and microhardness measurements. Moreover, microhardness measurements were carried out to investigate the mechanical properties. From the results, it was verified that the XRD patterns, SEM images, and EDS spectra confirmed the formation of a layer with ε-Fe 3 N and γ ′-Fe 4 N phases in all nitrided samples. The sample AISI-O1 steel, which was nitrided for 6 hours, exhibited a hardness about 46% higher than the one measured for the untreated sample. This sample also showed the thicker layer, with a mean of 7.22 μm. Therefore, this thermochemical treatment can improve mechanical properties in AISI O1 steel, and suggest its use in compression tools to improve this tools life.

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“…Compared with the laser spallation method (Ref 20) and the indentation test method ( Ref 21,22), the scratch experimental method (Ref [23][24][25] is the most convenient method to study the adhesion strength. Furthermore, the deformation on the surface of layer generated by continuous normal and tangential loads from an indenter can be observed clearly.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Scratch Resistance of TaC Dense Ceramic Layer on an Iron Matrix

Zhao

Zhong

et al. 2016

J. of Materi Eng and Perform

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A tantalum carbide dense ceramic layer with a thickness of $20 lm was produced on the surface of an iron matrix using an in situ technique. The morphology, microstructure, and phase composition of the layer were characterized by means of SEM, TEM, and XRD. The results show fairly agglomerated and uniformly sized ($200 nm) TaC particulates with a face-cantered cubic structure. The values of nano-hardness for the surface and cross section of reinforcing layer can be as high as 29.5 ± 0.6 and 26.7 ± 0.1 GPa, respectively, which were analyzed using a nano-indentation apparatus. Moreover, the scratch resistance of the layer was measured by scratch tests under a progressively increasing load of 0-100 N. A high critical load of 90.4 N is obtained. It is worthy to note that there are only cracking, slight splitting, and small flaking pits (even at the maximum load) all over the whole scratch process, namely the reinforcing layer can protect the iron matrix from serious abrasion effectively. In addition, the excellent scratch resistance and mechanism are discussed in detail.

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Multi-pass scratch test behavior of modified layer formed during plasma nitriding

Cited by 22 publications

References 18 publications

Effect of plasma nitriding treatment on structural, tribological and electrochemical properties of commercially pure titanium

Effect of plasma nitriding treatment on structural, tribological and electrochemical properties of commercially pure titanium

Effect of plasma nitriding time on the structural and mechanical properties of AISI‐O1 steel

Microstructure and Scratch Resistance of TaC Dense Ceramic Layer on an Iron Matrix

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