The Surface Texture of Ti6Al4V Titanium Alloy Under Wet and Dry Finish Turning Conditions

The influence of cooling conditions and surface topography after finish turning of Ti6Al4V titanium alloy on corrosion resistance and surface bioactivity was analyzed. The samples were machined under dry and minimum quantity lubrication (MQL) conditions to obtain different surface roughness. The surface topographies of the processed samples were assessed and measured using an optical profilometer. The produced samples were subjected to electrochemical impedance spectroscopy (EIS) and corrosion potential tests (Ecorr) in the presence of simulated body fluid (SBF). The surface bioactivity of the samples was assessed on the basis of images from scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) analysis. The inspection of the surfaces of samples after turning under dry and MQL conditions revealed unevenly distributed precipitation of hydroxyapatite compounds (Ca/P) with a molar ratio in the range of 1.73–1.97. Regardless of the cutting conditions and surface roughness, the highest values of Ecorr ~0 mV were recorded on day 7 of immersion in the SBF solution. The impedance characteristics showed that, compared to the MQL conditions, surfaces machined under dry conditions were characterized by greater resistance and the presence of a passive layer on the processed surface. The main novelty of the paper is the study of the effect of ecological machining conditions, namely, dry and MQL cutting on the corrosion resistance and surface bioactivity of Ti6Al4V titanium alloy after finish turning. The obtained research results have practical significance. They can be used by engineers during the development of technological processes for medical devices made of Ti6Al4V alloy to obtain favorable functional properties of these devices.

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Analysis of flat-end milling forces considering chip formation process in high-speed cutting of Ti6Al4V titanium alloy

Simulation Modelling Practice and Theory ◽

10.1016/j.simpat.2019.102039 ◽

2020 ◽

Vol 100 ◽

pp. 102039 ◽

Cited By ~ 5

Author(s):

Mehmet Aydın ◽

Uğur Köklü

Keyword(s):

Titanium Alloy ◽

Formation Process ◽

Chip Formation ◽

High Speed ◽

End Milling ◽

High Speed Cutting ◽

Ti6al4v Titanium Alloy ◽

Flat End Milling ◽

Milling Forces

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Resistance element welding of 7075 aluminum alloy to Ti6Al4V titanium alloy

Journal of Manufacturing Processes ◽

10.1016/j.jmapro.2021.08.047 ◽

2021 ◽

Vol 70 ◽

pp. 300-306

Author(s):

Shuai Wang ◽

Yang Li ◽

Yue Yang ◽

Sunusi Marwana Manladan ◽

Zhen Luo

Keyword(s):

Titanium Alloy ◽

Aluminum Alloy ◽

7075 Aluminum Alloy ◽

Ti6al4v Titanium Alloy ◽

Resistance Element Welding

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Influence of Milling on the Fatigue Lifetime of a Ti6Al4V Titanium Alloy

Metals ◽

10.3390/met5031148 ◽

2015 ◽

Vol 5 (3) ◽

pp. 1148-1162 ◽

Cited By ~ 18

Author(s):

Kamel Moussaoui ◽

Michel Mousseigne ◽

Johanna Senatore ◽

Remy Chieragatti ◽

Pascal Lamesle

Keyword(s):

Titanium Alloy ◽

Fatigue Lifetime ◽

Ti6al4v Titanium Alloy

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Analysis of Heat Transfer through PVC Window Profile Reinforced with Ti6Al4V Alloy

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.687.236 ◽

2016 ◽

Vol 687 ◽

pp. 236-242 ◽

Cited By ~ 1

Author(s):

Piotr Lacki ◽

Judyta Różycka ◽

Marcin Rogoziński

Keyword(s):

Heat Transfer ◽

Titanium Alloy ◽

Thermal Insulation ◽

Numerical Models ◽

Characteristic Temperature ◽

Permanent Deformation ◽

Transfer Coefficients ◽

Element Analysis ◽

Ti6al4v Titanium Alloy ◽

Characteristic Points

This requires the use of additional reinforcement in order to prevent excessive or permanent deformation of PVC windows. In the paper particular attention was devoted to space located in a corrosive environment exposed to chemical agents. For this purpose, proposed to change the previously used steel profiles reinforcements made of Ti6Al4V titanium alloy corrosion-resistant in the air, at sea and many types of industrial atmosphere. Analysis of the thermal insulation properties of PVC windows with additional reinforcement of profile Ti6Al4V titanium alloy was performed. PVC window set in a layer of thermal insulation was analyzed. Research was conducted using Finite Element Analysis. Numerical models and thermal calculations were made in the program ADINA, assuming appropriate material parameters. The constant internal temperature of 20 ̊ and an outer-20 ̊ was assumed. The course of temperature distribution in baffle in time 24 hours and graphs of characteristic points was obtained. The time of in which followed the steady flow of heat, as well as the course of isotherm of characteristic temperature in the baffle was determined. On the basis of numerical analysis obtained vector distribution of heat flux q [W/m2] and was determined heat transfer coefficients U [W/m2K] for the whole window with titanium reinforcement . All results were compared with the model of PVC windows reinforced with steel profile.

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Influence of micro-nano surface texture on the hydrophobicity and corrosion resistance of a Ti6Al4V alloy surface

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-05-2021-2488 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Bochun Xu ◽

Nan Zou ◽

Yunhao Jia ◽

Chao Feng ◽

Jiajia Bu ◽

...

Keyword(s):

Corrosion Resistance ◽

Titanium Alloy ◽

Surface Texture ◽

Surface Hydrophobicity ◽

Contact Angle Measurement ◽

Angle Measurement ◽

Alloy Surface ◽

Measurement Instruments ◽

Content Type

Purpose The purpose of this paper is to study the effect of micro-nano surface texture on the corrosion resistance of a titanium alloy and investigate the correlation between corrosion resistance and hydrophobicity. Design/methodology/approach The surface of the Ti6Al4V alloy was modified by laser processing and anodizing to fabricate micro-pits, nanotubes and micro-nano surface textures. Afterward, the surface morphology, hydrophobicity and polarization curve of the samples were analyzed by cold field scanning electron microscopy, contact angle measurement instruments and a multi-channel electrochemical workstation. Findings The micro-nano surface texture can enhance the hydrophobicity of the Ti6Al4V surface, which may lead to better drag reduction to ease the friction of implants in vivo. Nevertheless, no correlation existed between surface hydrophobicity and corrosion resistance; the corrosion resistance of samples with nanotubes and high-density samples with micro-nano surface texture was extremely enhanced, indicating the similar corrosion resistance of the two. Research limitations/implications The mechanism of micro-dimples on the corrosion resistance of the micro-nano surface texture was not studied. Practical implications The density of micro-pits needs to be optimized to guarantee excellent corrosion resistance in the design of the micro-nano surface texture; otherwise, it will not fulfill the requirement of surface modification. Originality/value The influence of the micro-nano surface texture on the corrosion resistance, as well as the relationship between hydrophobicity and corrosion resistance of the titanium alloy surface, were systematically investigated for the first time. These conclusions offer new knowledge.

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Influence of Selective Laser Melting on the Microporosity of Cellular Materials Based on Ti6Al4V Titanium Alloy

Russian Engineering Research ◽

10.3103/s1068798x21090148 ◽

2021 ◽

Vol 41 (9) ◽

pp. 871-873

Author(s):

P. N. Kilina ◽

L. D. Sirotenko ◽

K. R. Muratov ◽

T. R. Ablyaz

Keyword(s):

Titanium Alloy ◽

Selective Laser Melting ◽

Cellular Materials ◽

Laser Melting ◽

Ti6al4v Titanium Alloy

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Fretting wear behavior of thermal-oxidation on titanium alloy in air and vacuum atmosphere

International Journal of Modern Physics B ◽

10.1142/s0217979221501356 ◽

2021 ◽

pp. 2150135

Author(s):

Liangliang Sheng ◽

Xiangtao Deng ◽

Hao Li ◽

Yuxuan Ren ◽

Guoqing Gou ◽

...

Keyword(s):

Wear Resistance ◽

Titanium Alloy ◽

Thermal Oxidation ◽

Wear Behavior ◽

Fretting Wear ◽

Partial Slip ◽

Ti6al4v Titanium Alloy ◽

Slip Regime ◽

Air Atmosphere ◽

Vacuum Atmosphere

In this work, an in-situ XPS analysis test combined self-designed high precision fretting wear tester was carried out to study the fretting wear behavior and the resulting tribo-oxidation of thermal-oxidation film on Ti6Al4V titanium alloy under the varied working atmosphere. The fretting-induced tribo-oxidation under the air and vacuum ([Formula: see text] Pa) environment was analyzed and its response on the resulting fretting wear resistance and damage mechanism was discussed. Results show that the working environment plays a significant role in the formation of tribo-oxidation and then determining the fretting wear resistance. Thermal-oxidation film in the vacuum atmosphere shows a better fretting wear resistance than that in the air atmosphere for all fretting regimes, except for partial slip regime (PSR) where there is an equivalent fretting wear resistance. Compared with the substrate Ti6Al4V titanium alloy, the thermal-oxidation film in the vacuum atmosphere performs a good protection for titanium alloy, especially for slip regime (SR), but not applied for air atmosphere.

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Investigation on the microstructure and mechanical properties of Ti6Al4V titanium alloy electron beam welding joint

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/09544062211032988 ◽

2022 ◽

pp. 095440622110329

Author(s):

Xilong Zhao ◽

Xinhong Lu ◽

Kun Wang ◽

Feng He

Keyword(s):

Mechanical Properties ◽

Titanium Alloy ◽

Electron Beam ◽

Penetration Depth ◽

Welding Speed ◽

Welded Joints ◽

Electron Beam Welding ◽

Martensite Phase ◽

Ti6al4v Titanium Alloy ◽

Microstructure And Mechanical Properties

Electron beam welding (EBW) is a fusion joining process particularly suitable for welding titanium plates. In the present work, 2.5 mm thickness Ti6Al4V titanium alloy plates were butt-welded together with backing plates by EBW. The detailed procedures of experiments were used to investigate the microstructure and mechanical properties of welded joints. The optimum welding speed was determined by microstructure examinations, microhardness tests, X-Ray diffraction tests, shear punch tests (SPT) and stress simulation calculations. The results showed that all microstructure of welded metal (WM) was martensite phase under the different welding speeds. In the heat-affected zone (HAZ), the martensite phase gradually evolved to be small and equiaxed. It can be seen that the microstructure of each region in welded joints did not change significantly. When the welding speed is between 8 mm/s and 14 mm/s, it can be seen from the macroscopic appearance of the joints that there was no utterly fused penetration between the butt plate and substrate. Finite element simulation was carried out for the no-penetration depth under different welding conditions, and it was found that the stress suffered by the small no-penetration depth was the smallest. Using different welding parameters shows that the engineering stress in WM was higher than other areas, and BM was the lowest. As welding speed increases from 8 mm/s to 14 mm/s, the variation of microhardness distribution was not evident.

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