Parametric Evaluation of Medical Grade Titanium Alloy in MWCNTs Mixed Dielectric Using Graphite Electrode

2019 ◽  
pp. 1-14 ◽  
Author(s):  
Preetkanwal Singh Bains ◽  
Gurpreet Singh ◽  
Amandeep Singh Bhui ◽  
Sarabjeet Singh Sidhu
Keyword(s):  
Titanium Alloy ◽  
Graphite Electrode ◽  
Medical Grade

INCREASING THE RELIABILITY OF FRICTION UNITS MADE OF TITANIUM ALLOYS

2021 ◽  
Vol 1 (142) ◽  
pp. 100-106
Author(s):  
Egor O. Reshchikov ◽  
◽  
Il’ya V. Romanov ◽  
Roman N. Zadorozhniy ◽  
Keyword(s):  
Wear Resistance ◽  
Titanium Alloy ◽  
Titanium Alloys ◽  
Graphite Electrode ◽  
Research Purpose ◽  
High Wear Resistance ◽  
Specific Strength ◽  
Friction Units ◽  
Fluorescence Spectrometer

The most important advantages of titanium alloys over other structural materials are their high specific strength and heat resistance, combined with high corrosion resistance and low density. Despite all the positive characteristics of titanium alloys, their tribotechnical properties are very poor, which limits the use of these materials in moving joints. (Research purpose) The research purpose is in increasing the wear resistance and reliability of friction units made of titanium alloys by means of electric spark processing. (Materials and methods) For the study there was used samples of disks with a diameter of 60 and a thickness of 5 millimeters made of a hard alloy of the VT20 brand, an EIO "BIG-1M" installation, a Niton XL3t X-ray fluorescence spectrometer, a Surtronic profilometer, a TRB-S-DE-0000 tribometer, and an OLYMPUS GX51 microscope. (Results and discussion) Coatings were applied to samples made of titanium alloy by electric spark treatment with electrodes made of different materials. The tribotechnical characteristics of such coatings were studied in accordance with the ASTM G99 standard. It was found that the roughness of the samples after electric spark treatment significantly exceeds the roughness of the untreated sample. According to the results of the experiments, the most optimal electrode material was selected to increase the wear resistance of the surfaces of titanium alloys. The titanium alloy after electric spark treatment with a graphite electrode has a high wear resistance and a low coefficient of friction; graphite deposited on the surface of the sample does not form a strong coating, but plays the role of a solid lubricant that is gradually consumed during wear. (Conclusions) The surfaces obtained with the graphite electrode have the best wear resistance and the lowest friction coefficient.

Study on TiCN/Ti Based Composite Coating Fabricated by Reactive Electric Spark Deposition

2012 ◽  
Vol 190-191 ◽  
pp. 567-570
Author(s):  
Jian Jun Hao ◽  
Liang Gao ◽  
Shu Hua Yang ◽  
Xiong Zhuang Li ◽  
Yue Jin Ma
Keyword(s):  
Titanium Alloy ◽  
Composite Coating ◽  
Graphite Electrode ◽  
Substrate Surface ◽  
Alloy Surface ◽  
Interfacial Behavior ◽  
Nitrogen Gas ◽  
Hardness Tester ◽  
Tc4 Titanium Alloy ◽  
Microhardness Profile

In order to improve the wear-resisting properties of titanium alloy surface, reactive electric spark deposition was carried out using a graphite electrode in a nitrogen gas atmosphere, and TiCN/Ti based composite coating was fabricated on TC4 titanium alloy surface. The surface morphology, microstructure, interfacial behavior between the coatings and substrate, phase and element composition of the coatings were investigated by scanning electron microscope（SEM), X-ray diffraction (XRD) and Auger electron spectroscopy (AES). The microhardness hardness distributions as a function of depth were measured by a micro-hardness tester. The results show that the coating about 20μm thick is continuous, close, and completely covering the substrate surface and mainly composed of the TiCN phase which is in-situ synthesized by the reaction among titanium from the substrate, carbon from the graphite electrode and nitrogen from the shielding nitrogen gas. The coating has a strong metallurgical bonding and adhesion to the substrate. Microhardness profile falls off with the coatings thickness increasing and the highest microhardness values of the superficial coating could be up to 1496HV, which is six times more than that of the substrate.

INCREASING THE RELIABILITY OF FRICTION UNITS MADE OF TITANIUM ALLOYS

2021 ◽  
Vol 1 (142) ◽  
pp. 100-106
Author(s):  
Egor Reshchikov ◽  
◽  
Il’ya Romanov ◽  
Roman Zadorozhniy ◽  
Keyword(s):  
Wear Resistance ◽  
Titanium Alloy ◽  
Titanium Alloys ◽  
Graphite Electrode ◽  
Research Purpose ◽  
High Wear Resistance ◽  
Specific Strength ◽  
Friction Units ◽  
Fluorescence Spectrometer

The most important advantages of titanium alloys over other structural materials are their high specific strength and heat resistance, combined with high corrosion resistance and low density. Despite all the positive characteristics of titanium alloys, their tribotechnical properties are very poor, which limits the use of these materials in moving joints. (Research purpose) The research purpose is in increasing the wear resistance and reliability of friction units made of titanium alloys by means of electric spark processing. (Materials and methods) For the study there was used samples of disks with a diameter of 60 and a thickness of 5 millimeters made of a hard alloy of the VT20 brand, an EIO "BIG-1M" installation, a Niton XL3t X-ray fluorescence spectrometer, a Surtronic profilometer, a TRB-S-DE-0000 tribometer, and an OLYMPUS GX51 microscope. (Results and discussion) Coatings were applied to samples made of titanium alloy by electric spark treatment with electrodes made of different materials. The tribotechnical characteristics of such coatings were studied in accordance with the ASTM G99 standard. It was found that the roughness of the samples after electric spark treatment significantly exceeds the roughness of the untreated sample. According to the results of the experiments, the most optimal electrode material was selected to increase the wear resistance of the surfaces of titanium alloys. The titanium alloy after electric spark treatment with a graphite electrode has a high wear resistance and a low coefficient of friction; graphite deposited on the surface of the sample does not form a strong coating, but plays the role of a solid lubricant that is gradually consumed during wear. (Conclusions) The surfaces obtained with the graphite electrode have the best wear resistance and the lowest friction coefficient.

Wear and corrosion behaviour of various surface treated medical grade titanium alloy in bio-simulated environment

Wear ◽  
2009 ◽  
Vol 267 (5-8) ◽  
pp. 695-701 ◽  
Author(s):  
F. Yildiz ◽  
A.F. Yetim ◽  
A. Alsaran ◽  
I. Efeoglu
Keyword(s):  
Titanium Alloy ◽  
Corrosion Behaviour ◽  
Simulated Environment ◽  
Wear And Corrosion ◽  
Medical Grade

Electro-spark alloying using graphite electrode on titanium alloy surface for biomedical applications

2011 ◽  
Vol 257 (15) ◽  
pp. 6364-6371 ◽  
Author(s):  
Tang Chang-bin ◽  
Liu Dao-xin ◽  
Wang Zhan ◽  
Gao Yang
Keyword(s):  
Titanium Alloy ◽  
Biomedical Applications ◽  
Graphite Electrode ◽  
Alloy Surface

Reactive Electric Spark Deposition of Ti(CN)–Based Ceramics Coating on Titanium Alloy Substrate

2008 ◽  
Vol 368-372 ◽  
pp. 1313-1315 ◽  
Author(s):  
Jian Jun Hao ◽  
Zhi Guo Pu ◽  
Hong Jie Liu ◽  
Jian Guo Zhao
Keyword(s):  
Titanium Alloy ◽  
Graphite Electrode ◽  
Single Pulse ◽  
Ceramic Particle ◽  
Dendritic Crystal ◽  
Alloy Substrate ◽  
Tc4 Titanium Alloy ◽  
Average Grain Size ◽  
Titanium Alloy Substrate ◽  
Pulse Deposition

Ti(CN) -based ceramics coating was deposited on TC4 titanium alloy substrate using the home- made reactive electric spark deposition system, which is under nitrogen-sealed atmosphere and using the graphite electrode. It was showed that: (1) the single-pulse deposition zone presents irregular spattering shape and the phase of coatings was made up of TiC0.51N0.12 spherocrystal and dendritic crystal, Ti0.80V0.20 and C, (2) metallurgical bond between coating and substrate is realized, (3) the Ti(CN) ceramic particle, whose average grain size is 626nm, distributes dispersively among the coating and is in-situ synthesized by the reaction among titanium from the substrate, carbon from the graphite electrode and nitrogen from the shielding nitrogen gas.

Anisotropic ductile failure in titanium alloy at quasi-static and high strain rates

2003 ◽  
Vol 110 ◽  
pp. 571-576 ◽  
Author(s):  
A. A. Mir ◽  
D. C. Barton ◽  
T. D. Andrews ◽  
P. Church
Keyword(s):  
Titanium Alloy ◽  
High Strain ◽  
Ductile Failure ◽  
Strain Rates ◽  
High Strain Rates
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