Laser surface treatment of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si7.svg"><mml:mtext>α</mml:mtext><mml:mo>-</mml:mo><mml:mtext>β</mml:mtext></mml:math> titanium alloy to develop a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si8.svg"><mml:mtext>β</mml:mtext></mml:math> -rich phase with very high hardness

Chauhan, Alok Singh; Jha, Jyoti S.; Telrandhe, Sagar V.; Srinivas,; Gokhale, A.M.; Mishra, Sushil

doi:10.1016/j.jmatprotec.2020.116873

Cited by 21 publications

(12 citation statements)

References 34 publications

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“…Improvements in the properties of Ti-and TiAl-based alloys can be obtained by subsequent post-processing methods. For example, in a recent paper by A.S. Chauhan et al [86], laser surface heat treatment was tuned on a VT3-1 (α+β) titanium alloy to favor the formation of a microstructure surface gradient with a β-reach phase with high hardness. In another recent work by A. Bhardwaj et al [87], high-temperature constrained groove pressing (CGP) was applied on Ti-6Al-4V alloy, providing an increase in a yield strength, tensile strength and microhardness.…”

Section: Ti-based Alloysmentioning

confidence: 99%

Critical Raw Materials Saving by Protective Coatings under Extreme Conditions: A Review of Last Trends in Alloys and Coatings for Aerospace Engine Applications

et al. 2021

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Several applications where extreme conditions occur require the use of alloys often containing many critical elements. Due to the ever increasing prices of critical raw materials (CRMs) linked to their high supply risk, and because of their fundamental and large utilization in high tech products and applications, it is extremely important to find viable solutions to save CRMs usage. Apart from increasing processes’ efficiency, substitution, and recycling, one of the alternatives to preserve an alloy and increase its operating lifetime, thus saving the CRMs needed for its manufacturing, is to protect it by a suitable coating or a surface treatment. This review presents the most recent trends in coatings for application in high temperature alloys for aerospace engines. CRMs’ current and future saving scenarios in the alloys and coatings for the aerospace engine are also discussed. The overarching aim of this paper is to raise awareness on the CRMs issue related to the alloys and coating for aerospace, suggesting some mitigation measures without having the ambition nor to give a complete overview of the topic nor a turnkey solution.

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Section: Ti-based Alloysmentioning

confidence: 99%

Critical Raw Materials Saving by Protective Coatings under Extreme Conditions: A Review of Last Trends in Alloys and Coatings for Aerospace Engine Applications

et al. 2021

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“…Chauhan et al [69] used laser surface heat treatment (LST) to modify the surface microstructure of VT3-1 α-β-Ti alloy. LST was carried out at various laser powers (100-250 W) and scanning speeds of 150-500 mm/min.…”

Section: Hardnessmentioning

confidence: 99%

β-Ti Alloys for Orthopedic and Dental Applications: A Review of Progress on Improvement of Properties through Surface Modification

Shao

Dai

et al. 2021

Coatings

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Ti and Ti alloys have charming comprehensive properties (high specific strength, strong corrosion resistance, and excellent biocompatibility) that make them the ideal choice in orthopedic and dental applications, especially in the particular fabrication of orthopedic and dental implants. However, these alloys present some shortcomings, specifically elastic modulus, wear, corrosion, and biological performance. Beta-titanium (β-Ti) alloys have been studied as low elastic modulus and low toxic or non-toxic elements. The present work summarizes the improvements of the properties systematically (elastic modulus, hardness, wear resistance, corrosion resistance, antibacterial property, and bone regeneration) for β-Ti alloys via surface modification to address these shortcomings. Additionally, the shortcomings and prospects of the present research are put forward. β-Ti alloys have potential regarding implants in biomedical fields.

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“…Despite all this, Ti6Al4V alloy is still utilized to make wear components in chemical, aviation and automotive sectors, such as gear, spherical plain bearing, engine valve, and engine connection rod and turbine disk [4]. In recent years, a number of surface coating and modification techniques, including laser surface treatment, carburizing, nitriding, ion implantation and so on, have been employed to improve its wear properties, and some of them have achieved good results [5][6][7][8][9]. These achievements provide Ti6Al4V alloy with a great prospect for wider tribological applications.…”

Section: Introductionmentioning

confidence: 99%

Elevated-temperature wear behavior of Ti6Al4V alloy: microstructural evolution and properties change in subsurfaces and mild-severe wear transition

An¹,

Zhang²,

Du³

et al. 2023

Surf. Topogr.: Metrol. Prop.

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Dry sliding wear behavior of Ti6Al4V alloy were studied at elevated temperatures of 50-400oC. The constituent phases and morphologies of worn surfaces were examined to evaluate the roles of oxide layers and wear mechanisms in mild-severe wear transition (M-SWT). Microstructural evolution and hardness change in subsurfaces were also investigated to reveal the most fundamental reason for M-SWT. The results showed that M-SWT happened via severe plastic deformation (SPD) within 20-350oC, while mild wear prevailed via a protective mechanically mixed layer (MML) containing multiple oxide phases at 400oC. Large surface plastic deformation and frictional heat activated dynamic recrystallization (DRX) softening in subsurface, which resulted in M-SWT. The critical load for M-SWT presented an approximate linear relationship with testing temperature within 20-250oC, from which a critical temperature of 555.8oC for M-SWT was obtained by linearly fitting method. It was thought as the critical temperature for DRX realization in surface layer, and it was utilized to calculate the transition loads at 300oC and 350oC.

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Laser surface treatment of α-β titanium alloy to develop a β -rich phase with very high hardness

Cited by 21 publications

References 34 publications

Critical Raw Materials Saving by Protective Coatings under Extreme Conditions: A Review of Last Trends in Alloys and Coatings for Aerospace Engine Applications

Critical Raw Materials Saving by Protective Coatings under Extreme Conditions: A Review of Last Trends in Alloys and Coatings for Aerospace Engine Applications

β-Ti Alloys for Orthopedic and Dental Applications: A Review of Progress on Improvement of Properties through Surface Modification

Elevated-temperature wear behavior of Ti6Al4V alloy: microstructural evolution and properties change in subsurfaces and mild-severe wear transition

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