Microstructure and micro-abrasive wear of sintered yttria-containing 316L stainless steel treated by plasma nitriding

Ordoñez, M.F.C.; Amorim, Cintia L.G.; Krindges, Israel; Aguzzoli, César; Baumvol, Israel Jacob Rabin; Figueroa, Carlos A.; Sinatora, Amilton; Souza, R.M.; Farias, M.C.M.

doi:10.1016/j.surfcoat.2019.06.002

Cited by 22 publications

(18 citation statements)

References 75 publications

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“…All of the diffraction patterns consist of two relatively low peaks at 50.6° and 74.7°. These peak positions are close to the (200) and (220) diffraction of the austenite phase in the substrate[24]. The broader peaks indicate the existence of additional phase with finer grain size.…”

supporting

confidence: 61%

Effect of surface adsorption on icing behaviour of metallic coating

Wang

Memon

Liu

et al. 2019

Surface and Coatings Technology

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Icephobicity of materials has received intensive attention in recent years due to the increasing requirement of ice protection in aerospace, wind energy and power lines. However, the influencing factors of material icephobicity have not been well identified. In this work, the effect of surface gaseous adsorption on icing behaviour of materials was investigated for the first time.Ni-Cu-P coatings with different surface morphologies were fabricated and used as the objects of the study. Environmental scanning electron microscopy (ESEM) was utilized to observe the water condensation and ice formation on the coatings. X-ray photoelectron spectroscopy (XPS) was employed to analyse the variations of surface adsorption. Droplets icing time and ice adhesion strength of the coatings were also studied. The results showed that the icing time of water droplets on the Ni-Cu-P coatings increased significantly, and the ice adhesion strength decreased sharply with the spontaneous surface adsorption of gaseous species (mainly hydrocarbon groups) in air. The adsorbed hydrocarbon species would promote the formation of air pockets between the ice-coating interface, which could effectively reduce the interfacial contact of the formed ice with the coating. When the adsorbed hydrocarbon species were removed by plasma cleaning, water droplets tended to have more direct contacts with the coatings prior to icing, leading to the formation of interlocked ice and significantly increased the ice adhesion on the surface. The variation of surface icephobicity can also be attributed to the changes of surface energy due to the surface adsorption. The results indicated that the surface gaseous adsorption in air played an important role in determining the surface icing behaviour and the icephobicity of the materials.

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supporting

confidence: 61%

Effect of surface adsorption on icing behaviour of metallic coating

Wang

Memon

Liu

et al. 2019

Surface and Coatings Technology

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“…The crystal structure of the S-phase also has a face-centered cubic structure, the S-phase was formed due to the incorporation of the nitrogen atoms in the interstitial positions and gaps of the austenite structure. Overall these findings are following results reported by many studies [55,56].…”

Section: Surface Microstructure Analysessupporting

confidence: 90%

“…It can be considered a nitrocarburizing treatment since the salts used often typically contribute carbon to the surface of the workpiece, and the two elements generally permeate into the surface of the industrial parts [48]. There have been researched studies of the effects of nitriding treatments on the behavior of surface microstructure and characteristics of austenitic stainless steel such as AISI 304 [49,50], AISI 304L [51], AISI 321 [52], AISI 201 [53], AISI 316 [54], AISI 316L [55,56], AISI 202 [57], AISI 316LN [58] and AISI 316LVM [59], AISI 310[60], AISI 303 [61], AISI 204 [62]. However, there is a lack of research about the surface microstructural and tribological behavior of AISI 316L stainless steel during salt bath nitriding by the Tenifer process (TF1) at 580 °C.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Mechanical and Tribological Behaviour of Aisi 316l Stainless Steel During Salt Bath Nitriding

Ghelloudj

2021

Acta Metall Slovaca

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The aim of the current work was to analyse the impact of salt bath nitriding on the behavior of the tribological characteristics and surface microstructures of AISI 316L stainless steels. Nitriding was carried out at 580°C for 10 h. The tribological, structural behavior of the AISI 316L before and after salt bath nitriding was compared. The surface microstructures, tribological characteristics, as well as its surface hardness, were investigated using optical microscopy (OM), X-ray diffractometer (XRD), surface profilometer, pin-on-disk wear tester and microhardness tester. In the current work the experimental results showed that a great surface hardness could be achievable through salt bath nitriding technique because of the formation of the so-called expanded Austenite (S-phase), the nitrogen diffusion region. The surface hardness of AISI 316 stainless steel after nitriding process reached 1100 HV0.025 which was six times the untreated sample hardness. The S-phase is additionally expected to the improvement of wear resistance and decrease the friction coefficient.

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“…Additionally, the microhardness of the specimen material at 0.1 mm depth is higher than 1000 HV 0.2 . According to previous research [6,17,30,34], the specimen with the higher hardness exhibits the better wear properties in plasma nitriding treatment. Hence, the plasma-nitrided specimen under 783 K is selected as the specimen in the wear properties experiment.…”

Section: Microhardnessmentioning

confidence: 82%

Investigation of the Surface Properties and Wear Properties of AISI H11 Steel Treated by Auxiliary Heating Plasma Nitriding

et al. 2020

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This paper presents an auxiliary heating method to maintain a uniform specimen temperature and precisely control nitriding temperature during plasma nitriding. The surface properties and wear properties of AISI H11 steel treated by auxiliary heating plasma nitriding are investigated. Firstly, the specimens with different diffusion layers and different hardness levels are fabricated through changing the plasma nitriding temperature. Secondly, the surface properties of the plasma-nitrided H11 steel specimens are characterized by a scanning electron microscope (SEM), X-ray diffractometer, metallographic microscope and microhardness tester. The results show that the surface hardness of the plasma-nitrided specimen is almost twice as high as that of the untreated specimen. The thickness of diffusion layer increases with the increase of nitriding temperature. However, the surface hardness firstly increases and then decreases with the increase of the nitriding temperature. Finally, the wear properties of untreated and plasma-nitrided H11 steel specimens are investigated under different friction conditions. The results show that the plasma-nitriding method can significantly improve the wear resistance of AISI H11 steel. The friction coefficient fluctuations of the plasma-nitrided specimens are all lower than those of the untreated specimens. In addition, the wear rates of the plasma-nitrided specimens rise along with load, and reduce along with the sliding speed and friction temperature.

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Microstructure and micro-abrasive wear of sintered yttria-containing 316L stainless steel treated by plasma nitriding

Cited by 22 publications

References 75 publications

Effect of surface adsorption on icing behaviour of metallic coating

Effect of surface adsorption on icing behaviour of metallic coating

Microstructure, Mechanical and Tribological Behaviour of Aisi 316l Stainless Steel During Salt Bath Nitriding

Investigation of the Surface Properties and Wear Properties of AISI H11 Steel Treated by Auxiliary Heating Plasma Nitriding

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