Surface characterization and diffusion model of pack borided TB2 titanium alloy

Li, Ping; Liú, Dan; Bao, Weizong; Ma, Lishi; Duan, Yonghua

doi:10.1016/j.ceramint.2018.07.060

Cited by 47 publications

(7 citation statements)

References 42 publications

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“…Yong et al (2020) carried out a boronizing treatment of Ti alloy for 5–20 h at 860°C–920°C, and the boride layer consisting of outer layer TiB 2 and inner layer TiB was obtained. Li et al (2018) fabricated TiB 2 and TiB borides on TB 2 alloy at the temperature range of 950°C–1100°C for 5, 10, 20 and 30 h, and two diffusion models were established to predict the boride layer thickness. Duan et al (2018) fabricated a boride layer on Ti6A14V at 950°C–1100°C for 5–30 h. It was found that the boride layer obtained the highest hardness and optimal tribological properties at 1100°C for 10 h. However, the effect of applied load and test temperature on the tribological behaviors of boride layers was not clearly understood.…”

Section: Introductionmentioning

confidence: 99%

Tribological investigations of boride layers on Ti6Al4V at room and elevated temperatures

Zhang

Bai

et al. 2023

ILT

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Purpose This paper aims to improve the wear resistance of titanium alloy using a high-hardness boride layer, which was fabricated on Ti6Al4V by a high-temperature boronizing process. Design/methodology/approach The boride layers on Ti6Al4V were obtained at 1000°C for 5–15 h. Scanning electron microscopy, energy dispersive analysis and X-ray diffractometer were used to characterize the properties of the boride layer. The tribological performance of the boride layer at room and elevated temperatures was investigated. Findings The X-ray diffraction analysis showed that the boride layers were a dual-phase structure of TiB and TiB2. When the boronizing time increased from 5 h to 15 h, the microhardness increased from 1192 HV0.5 to 1619.8 HV0.5. At 25°C and elevated temperatures, the friction coefficients of the boride layers were higher than that of Ti6Al4V. The wear track areas of T-5 at 200°C and 400°C were 2.5 × 10–3 and 1.1 × 10–3 mm2, respectively, which were 6.1% and 2.6% of that of Ti6Al4V, indicating boride layer exhibited a significant wear resistance. The wear mechanisms of the boride layer transformed from slight peeling to oxidative wear and abrasive wear as the temperature was raised. Originality/value The findings provide an effective strategy for improving the wear resistance of Ti6Al4V and have important implications for the application of titanium alloy in a high-temperature field.

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Section: Introductionmentioning

confidence: 99%

Tribological investigations of boride layers on Ti6Al4V at room and elevated temperatures

Zhang

Bai

et al. 2023

ILT

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“…Pack boriding methods present the simplest experimental setup, compared to the other boriding methods, but higher temperatures and longer treatment times are required [14]. Pack boriding has been recently studied in the boriding of titanium-based alloys [14][15][16][17][18][19], steel alloys [6-8, 10, 20-26], cobalt-base alloys [9,[27][28][29][30][31], and nickel-base alloys [32][33][34], and is usually performed using commercial powder mixtures, however, the pack boriding of steel and iron with different powder compositions was previously investigated [2,10,17,19,26,35,36]. The borided layers in carbon and alloyed steels usually have the Fe 2 B single-phase or a two-phase morphology: FeB and Fe 2 B.…”

Section: Introductionmentioning

confidence: 99%

Effects of boron concentration on the microstructure, mechanical and tribological properties of powder-pack borided AISI 4140 steel

Silveira

Pukasiewicz²,

Souza³

et al. 2022

Preprint

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Three different boron amounts were used in this study to control the microstructure, mechanical, and tribological properties of borided cases on AISI 4140 steel. A single Fe2B phase was observed for the lowest boron amount, while both Fe2B and FeB phases were present on the other two boron compositions. The highest surface hardness was observed in the highest boron amount. The scratch tests revealed different cohesive failure mechanisms on the samples, such as arc and chevron tensile cracks, and even chipping was observed for all three-studied boron amounts; it appeared at lower applied loads for the highest boron amount, indicating a likely detachment of the fragile FeB layer. The borided layers presented abrasive wear during the ball-on-flat wear tests. Despite the lower specific wear rate, the surface damage was more severe in the sample with the highest boron amount, due to its brittleness, resulting in lower resistance to surface fatigue.

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“…Many dual process treatments were also attempted like plasma nitriding, nitroboronizing, alumina boronizing and boronitrocarburizing [17]. Campos Silva et al [18] studied the scratch and adhesion properties of the nickel boride layer on Inconel 718 super alloy formed by the powder-pack boriding process carried out at 900 o C for 2 to 6 h. The same process was applied in another study on a TB2 alloy and a diffusion model was proposed for the growth of the boride layer thickness [19]. A boronizing process was applied on the materials AISI 420 and 5120 resulting in approximately 5-fold lower wear rate as compared to that for theun-borided materials [20].…”

Section: Introductionmentioning

confidence: 99%

Surface modification method of duplex type stainless steels by the pack boriding process

Hariharan¹,

Rathinam²,

Beemaraj³

et al. 2021

Hem Ind

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This work presents the investigation of a boriding process on two grades of stainless steel namely UNS32750 super duplex stainless steel and UNSS31803 duplex stainless steel in order to improve material properties and possibly to reduce catastrophic failure of industrial components. Usage of duplex stainless steels has become customary in the fields of oil and refinery, marine and pipeline applications due to increased corrosion resistance; however, these materials exhibit low wear characteristics. To overcome this problem, in this work the pack boriding process was employed. Evaluation of effects of the boriding process on the microstructure and mechanical properties was performed using scanning electron and optical microscopy, Vickers hardness tests and wear tests. It was shown that the 4 h process resulted in the greatest boriding layer thickness yielding the maximum surface hardness of 1407 HV in the super duplex stainless steel UNS32750 while this value was 1201 HV in the duplex stainless steel UNSS31803. Wear resistance of borided materials were up to 6-fold greater than those of non - treated materials. Also, the borided duplex materials were shown to be more suitable for industrial applications for valve and shaft components as compared to the boronized super duplex stainless steel.

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Surface characterization and diffusion model of pack borided TB2 titanium alloy

Cited by 47 publications

References 42 publications

Tribological investigations of boride layers on Ti6Al4V at room and elevated temperatures

Tribological investigations of boride layers on Ti6Al4V at room and elevated temperatures

Effects of boron concentration on the microstructure, mechanical and tribological properties of powder-pack borided AISI 4140 steel

Surface modification method of duplex type stainless steels by the pack boriding process

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