Fatigue crack initiation and propagation in a PM-gear tooth root

Ignatijev, Aljaž; Nečemer, Branko; Kramberger, Janez; Glodež, Srečko

doi:10.1016/j.engfailanal.2022.106355

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…For instance, for a titanium gear, only the tooth surfaces need to be hardened and the rest of the surface should be free from oxygen to maintain its toughness and fatigue strength. This can maximize the performance of the titanium gear in terms of high hardness and wear resistance of the articulating tooth surfaces together with high fatigue properties and high specific strength. , Therefore, how to achieve selective deep-case hardening of titanium alloys is an important task from both scientific and technological points of view. This work aims at developing a novel selective deep-case hardening technique for titanium alloys via nanoparticle prepainting and vacuum diffusion.…”

Section: Introductionmentioning

confidence: 99%

A Novel Treatment to Selectively Harden Ti6Al4V Surfaces

Wei

Zhang

2023

ACS Omega

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Various surface treatments have been developed on titanium and its alloy to improve their tribological properties. However, for some components, only specific surfaces need to be hardened rather than the whole surfaces. This study develops a duplex heat treatment including selective surface hardening by prepainting TiO2 powders and thermal oxidation. It is found that the TiO2 powder layer can be used as an oxygen reservoir for boosting diffusion treatment at temperatures of 800–900 °C. The abundance of oxygen provides high potential and accelerates the diffusion process, deeply hardening the surface case. Moreover, the duplex treatment is optimal for selectively hardened surfaces with high load-bearing capacity and much improved tribological properties. Prepainting the surfaces that need to be hardened is easy to operate and has good potential to be applied in industry.

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Section: Introductionmentioning

confidence: 99%

A Novel Treatment to Selectively Harden Ti6Al4V Surfaces

Wei

Zhang

2023

ACS Omega

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“…For instance, for a titanium gear, only the tooth surfaces need to be hardened and the rest of the surface should be free from oxygen to maintain its toughness and fatigue strength. This can maximize the performance of the titanium gear in terms of high hardness and wear resistance of the articulating tooth surfaces together with high fatigue properties and high specific strength 17,18 . Therefore, how to achieve selective deep-case hardening of titanium alloys is an important task from both a scientific and technological point of view.…”

Section: Introductionmentioning

confidence: 99%

A Novel Surface Treatment to Selectively Harden TI6AL4V Surfaces

Wei

et al. 2023

Preprint

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Various surface treatments have been developed on Ti and its alloy to improve their tribological properties. However, for some components, only specific surfaces need to be hardened rather than the whole surfaces. This study develops a duplex heat treatment including selective surface hardening by pre-painting TiO2 powder and thermal oxidation. It is found TiO2 powdered layer can be used as an oxygen reservoir for boost diffusion treatment at a temperature of 800–900°C. The abundance of oxygen provides high potential and accelerates the diffusion process, deeply hardening the surface case. Moreover, the duplex treatment is optimal for selectively hardened surfaces with high load-bearing capacity and much improved tribological properties. Pre-painting the surfaces that need to be hardened is easily operated and has good potential to be applied in industry.

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“…Ongoing efforts are mainly devoted to the reliability of engineering systems [6][7][8] and improvements in materials' properties [9][10][11]. For instance, in the case of machinery operating with contaminated fluids, erosion and deposition phenomena [12][13][14] induce long-term alterations in the material's structure, resulting in performance deterioration, heightened noise and vibration, and ultimately, premature and unforeseen component failure [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Microstructural Investigation and Impact Strength of Sinter-Hardened PM Steels: Influence of Ni Content and Tempering Temperature

Suman,

Fortini,

Vezzani

et al. 2023

Metals

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This study analyzed the influence of tempering treatment temperature on the microstructural and mechanical behavior of two different powder metallurgy steels containing 0 wt. % Ni and 4 wt. % Ni. The evolution of the microstructure and the macro- and microhardness of the microstructural constituents resulting from tempering treatments conducted on the sinter-hardened materials at temperatures ranging from 160 °C to 300 °C were investigated. The role of the tempering conditions in the impact behavior was assessed using Charpy tests on V-notched and unnotched samples, tempered at 180 °C, 220 °C and 280 °C. The observed macrohardness reduction with increasing tempering temperature was related to martensite transformations. At high tempering temperatures, the remarkable loss in impact energy values was attributed to microfracture modes. The contribution of Ni-rich austenite areas in enhancing impact strength was detected.

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Fatigue crack initiation and propagation in a PM-gear tooth root

Cited by 8 publications

References 23 publications

A Novel Treatment to Selectively Harden Ti6Al4V Surfaces

A Novel Treatment to Selectively Harden Ti6Al4V Surfaces

A Novel Surface Treatment to Selectively Harden TI6AL4V Surfaces

Microstructural Investigation and Impact Strength of Sinter-Hardened PM Steels: Influence of Ni Content and Tempering Temperature

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