Mechanical performance of thermally post-treated ion-nitrided steels

Rosales, I.; Martı́nez, H.; Guardián, R.

doi:10.1016/j.apsusc.2016.03.048

Cited by 11 publications

(13 citation statements)

References 8 publications

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“…XRD pattern of as-O1 steel, Figure 1, confirms the Martensite phase from the structural transformation during tempering step of the material. 5,18,[24][25][26] The Martensite is a solid phase at a very hard form of the steel crystalline structure formed by an interstitial supersaturated solution of carbon (C) in alpha (α ′ ) iron, with a BCT structure, 24 in which iron (Fe) atoms are at the vertices, and C atoms at faces and at edges. Thus, it was determined that the materials have a highly distorted lattice.…”

Section: Xrd Analysismentioning

confidence: 99%

“…It is established that nitrogen reacts with the elements present in steel, generating new nitrides with the alloying elements. 18 This way, ε-Fe 3 N, γ ′ -Fe 4 N, Fe 24 N 10 and NW phases were identified, according to ICSD#163929, ICSD#79980, ICSD#24652 and ICSD#257079, respectively. The last one start to appear just in N6h-O1, at peak at 35.…”

Section: Xrd Analysismentioning

confidence: 99%

“…[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. In addition, this process allows to reduce the treatment time, obtain minimal distortions, low gas consumption, energy and no harm to the environment when compared with other surface modification techniques.…”

Section: Introductionmentioning

confidence: 99%

“…21,22 Plasma nitriding process was used in this work to increase the tool live of AISI-O1 steel punches of tablet machines from the Laboratory of Development of Solid Pharmaceutical Forms at Federal University of Piauí (UFPI). For Rosales et al, 18 the plasma nitriding process is a technic that enhances properties of tools made of AISI-O1 steel, showing a microhardness of 1326 HV and a good result of wear.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Xrd Analysismentioning

confidence: 99%

Section: Xrd Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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“…For steel's superficial modification, one of the most applied techniques is plasma-assisted nitriding. With this modification process, it is possible to harden and improve the mechanical properties in the first superficial atomic layers of the steel by the process of nitrogen diffusion into the inner alloy, resulting in the formation of multilayers with properties other than the metal matrix [5,10]. The layer known as a nitrided layer is thin and consists of iron nitrides in different phases.…”

Section: Introductionmentioning

confidence: 99%

Implementation of a Low Cost For Internal Dosimetry Radiological Survey of Ionization Radiation Exposed Workers In Nuclear Medicine Services

Valle

Angeles

Garcia

2017

JNP

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In the present work, we analyzed the effect of the plasma treatment of 80% H 2 /20% N 2 mixture plasma over the AISI 1045 steel. To produce the plasma, an AC discharge of 0.1 A at 350 V was produced at a total pressure of 3.0 Torr. The mixture plasma was analyzed using optical emission spectroscopy (OES), in the wavelength range of 200 to 1100 nm. The principal species observed in the plasma were NH, N 2 , N 2 + , H 2 , and Hα. The electron temperature and ion density have been measured using a double Langmuir probe. The samples of steel were treated by plasma at different discharge times, between 3 and 12 h, at the same pressure and AC parameters (0.1 A and 350 V). The treated samples were characterized using X-ray analysis, finding the phases gamma and epsilon of iron nitride. The thickness of the nitrided layers was measured using a scanning electron microscope (SEM). From the images obtained, it is possible to appreciate the interphase between the nitrided layer and the steel matrix. The relationship between the morphology of the surface of nitrided steel and the wetting was analyzed by measuring the contact angle between the surface and a drop of 5 µL of distilled water. The contact angle of the drop increased with the increase of plasma treatment time. The control sample without treatment presented a smaller angle, and after the treatment the surfaces of the steel became hydrophobic. This may be related to the morphology change of the steel surface produced by plasma treatment.

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Development of Nitriding to Reduce Consumption of Process Factors

Wołowiec-Korecka

2024

Physical Chemistry in Action

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Mechanical performance of thermally post-treated ion-nitrided steels

Cited by 11 publications

References 8 publications

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

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

Implementation of a Low Cost For Internal Dosimetry Radiological Survey of Ionization Radiation Exposed Workers In Nuclear Medicine Services

Development of Nitriding to Reduce Consumption of Process Factors

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