Formation of nitrided layer using atmospheric-controlled IH-FPP and its effect on the fatigue properties of Ti-6Al-4V alloy under four-point bending

Kikuchi, Shoichi; Ota, S.; Akebono, Hiroyuki; Omiya, Masaki; Komotori, Jun; Sugeta, Atsushi; Nakai, Yoshikazu

doi:10.1016/j.prostr.2016.06.428

Cited by 16 publications

(4 citation statements)

References 19 publications

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“…Conventional nitriding will cause the crystal grains of the titanium alloy to coarsen and cannot form a good matrix structure [27,28]. Next, we studied the microstructure changes of the matrix after cold rolling and low-temperature nitriding.…”

Section: Characterization Of Microstructure After Deformation and Nitridingmentioning

confidence: 99%

Effect of Deformation on the Microstructure of Cold-Rolled TA2 Alloy after Low-Temperature Nitriding

et al. 2021

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In order to improve the low hardness and poor wear resistance of TA2, this paper proposes a composite process of cold-rolling and low-temperature plasma nitriding with recrystallization. This composite modification process can effectively achieve the dual goals of modifying the matrix structure and surface of TA2 alloy simultaneously. The cold-rolling experimental results indicate that when the deformation rate increases, the small-sized grains in the sample increase significantly, and the grain orientation changes from TD (transverse direction) to RD (rolling direction) and then to TD. The nitriding experimental results indicate that the {0001} basal surface texture deflected from the TD direction to the RD direction, {10-10} cylindrical texture components gradually increased, and the special orientation phenomenon of cylindrical and conical texture disappeared, it can be seen that an increase in the deformation rate promotes recrystallization. The XRD test results indicate that after low-temperature nitriding, metastable nitriding phase TiN0.26 is formed on the surface of TA2. The SEM morphology of the cross-section shows that a relatively special nitrided zone is formed, and mechanical performance test results indicate the wear resistance and hardness of the alloy increased.

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Section: Characterization Of Microstructure After Deformation and Nitridingmentioning

confidence: 99%

Effect of Deformation on the Microstructure of Cold-Rolled TA2 Alloy after Low-Temperature Nitriding

et al. 2021

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“…Plasma nitriding favors the formation of hard and wear-resistant ceramic compound layers of titanium nitrides on titanium and its alloys, as well as a solid-solution sublayer of N-interstitial α-Ti crystals [ 18 ]. High-temperature nitriding with a long time of treatment can significantly improve the hardness and wear performance of titanium alloys [ 18 , 19 , 20 ] but can cause mechanical degradation, unpredictable deformation, and even β phase transformation leading to failure of the industrial components [ 21 ]. As a probable method to overcome these drawbacks, low-temperature plasma nitriding treatment below 700 °C has attracted the attention of many researchers [ 22 , 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Structure and Wear Performance of a Titanium Alloy by Using Low-Temperature Plasma Oxy-Nitriding

Li¹,

Wang

Wang³

et al. 2023

Materials

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To solve the problems of high nitriding temperature and long nitriding time with conventional plasma nitriding technologies, a kind of low-temperature plasma oxy-nitriding technology containing two-stage processes with different ratios of N to O was developed on a TC4 alloy in this paper. A thicker permeation coating can be obtained with this new technology compared to conventional plasma nitriding technology. The reason for this is that the oxygen introduction in the first two-hour oxy-nitriding step can break the continuous TiN layer, which facilitates the quick and deep diffusion of the solution-strengthening elements of O and N into the titanium alloy. Moreover, an inter-connected porous structure was formed under a compact compound layer, which acts as a buffer layer to absorb the external wear force. Therefore, the resultant coating showed the lowest COF values during the initial wear state, and almost no debris and cracks were detected after the wear test. For the treated samples with low hardness and no porous structure, fatigue cracks can easily form on the surface, and bulk peeling-offcan occur during the wear course.

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“…In this process, N2 gas is blown over a material heated by high-frequency induction in a N2 atmosphere. A nitride layer is formed on a titanium alloy within a few minutes using this process [5,6]. It was found that gas blow IH nitrided titanium alloy exhibited the same properties as titanium nitrided using standard processes, in that although the wear resistance was improved, the fatigue strength was reduced due to the formation of a nitrogen compound layer on the top surface [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…A nitride layer is formed on a titanium alloy within a few minutes using this process [5,6]. It was found that gas blow IH nitrided titanium alloy exhibited the same properties as titanium nitrided using standard processes, in that although the wear resistance was improved, the fatigue strength was reduced due to the formation of a nitrogen compound layer on the top surface [5,6]. However, a nitrogen diffusion layer is also present beneath the surface nitrogen compound layer, and this is also expected to possess a high degree of hardness, which may lead to improved wear resistance and fatigue properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Nitrogen Diffusion Layer Formed by Gas Blow Induction Heating Nitriding on Wear Resistance and Fatigue Properties of Titanium Alloy

Takesue

Kikuchi

Akebono

et al. 2018

The 18th International Conference on Experimental Mechanics

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Abstract:The effect of the nitrogen diffusion layer formed by gas blow induction heating nitriding on the wear resistance and the fatigue properties of a titanium alloy was investigated. The nitrogen diffusion layer deteriorated the wear resistance of a titanium alloy. This is probably because hard abrasive particles worn from the diffusion layer accelerates the wear of the material. In contrast, the diffusion layer improved the fatigue properties of a titanium alloy. This is due to the high hardness of the diffusion layer, and because the layer and the substrate share the same elastic modulus, the surface stress concentration is inhibited.

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Formation of nitrided layer using atmospheric-controlled IH-FPP and its effect on the fatigue properties of Ti-6Al-4V alloy under four-point bending

Cited by 16 publications

References 19 publications

Effect of Deformation on the Microstructure of Cold-Rolled TA2 Alloy after Low-Temperature Nitriding

Effect of Deformation on the Microstructure of Cold-Rolled TA2 Alloy after Low-Temperature Nitriding

Structure and Wear Performance of a Titanium Alloy by Using Low-Temperature Plasma Oxy-Nitriding

Effect of the Nitrogen Diffusion Layer Formed by Gas Blow Induction Heating Nitriding on Wear Resistance and Fatigue Properties of Titanium Alloy

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