Boundary Lubrication Properties of Surface Modified Material Produced by Laser and Electron Beam Surface Alloying

1993 ◽  
Vol 36 (4) ◽  
pp. 633-638
Author(s):  
Akihiko Yano ◽  
Yoshimi Kagimoto ◽  
Kunio Saki ◽  
Yasuyuki Yoshida ◽  
Tsuneto Hirozane ◽  
...  
Keyword(s):  
Electron Beam ◽  
Boundary Lubrication ◽  
Surface Alloying ◽  
Beam Surface ◽  
Surface Modified ◽  
Lubrication Properties

scholarly journals Influence of Beam Power on Young’s Modulus and Friction Coefficient of Ti–Ta Alloys Formed by Electron-Beam Surface Alloying

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1246
Author(s):  
Stefan Valkov ◽  
Dimitar Dechev ◽  
Nikolay Ivanov ◽  
Ruslan Bezdushnyi ◽  
Maria Ormanova ◽  
...  
Keyword(s):  
Electron Beam ◽  
Young’S Modulus ◽  
Coefficient Of Friction ◽  
Young's Modulus ◽  
Beam Power ◽  
Surface Alloying ◽  
Surface Alloys ◽  
X Ray ◽  
The Coefficient Of Friction ◽  
Beam Surface

In this study, we present the results of Young’s modulus and coefficient of friction (COF) of Ti–Ta surface alloys formed by electron-beam surface alloying by a scanning electron beam. Ta films were deposited on the top of Ti substrates, and the specimens were then electron-beam surface alloyed, where the beam power was varied from 750 to 1750 W. The structure of the samples was characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). Young’s modulus was studied by a nanoindentation test. The coefficient of friction was studied by a micromechanical wear experiment. It was found that at 750 W, the Ta film remained undissolved on the top of the Ti, and no alloyed zone was observed. By an increase in the beam power to 1250 and 1750 W, a distinguished alloyed zone is formed, where it is much thicker in the case of 1750 W. The structure of the obtained surface alloys is in the form of double-phase α’and β. In both surface alloys formed by a beam power of 1250 and 1750 W, respectively, Young’s modulus decreases about two times due to different reasons: in the case of alloying by 1250 W, the observed drop is attributed to the larger amount of the β phase, while at 1750 W is it due to the weaker binding forces between the atoms. The results obtained for the COF show that the formation of the Ti–Ta surface alloy on the top of Ti substrate leads to a decrease in the coefficient of friction, where the effect is more pronounced in the case of the formation of Ti–Ta surface alloys by a beam power of 1250 W.

Properties of Mold Steel 3Cr2W8V by Electron Beam Surface Alloying

2012 ◽  
Vol 6 (21) ◽  
pp. 635-343
Author(s):  
Yuanfang Chen ◽  
Xiaodong Peng ◽  
Hongbin Xu ◽  
Jianjun Hu ◽  
liu chun
Keyword(s):  
Electron Beam ◽  
Surface Alloying ◽  
Beam Surface

scholarly journals Control of the surface electron-beam alloying process by vibration monitoring

2018 ◽  
Vol 19 (7) ◽  
pp. 702 ◽  
Author(s):  
Sergey V. Fedorov ◽  
Mikhail P. Kozochkin ◽  
Mikhail M. Stebulyanin
Keyword(s):  
Electron Beam ◽  
Vibration Monitoring ◽  
Surface Alloying ◽  
Surface Electron ◽  
Near Surface ◽  
Vibroacoustic Signal ◽  
Processed Material ◽  
Electronic Pulse ◽  
Beam Surface ◽  
Current Electron

The experimental results prove the ability to realize technology of chemical heat treatment of some materials by surface alloying using a wide-aperture low-energy high-current electron beam. Doped hardened layers were produced due to initiating exothermic chemical reactions between the base and the thin film covered on it. Nevertheless, it is quite difficult to control the process of surface electron-beam alloying due to the significant variation in the parameters of the microsecond electron beam pulse and the instability of its interaction with the processed material. It leads to significant random changes that occur spontaneously, regardless of the control system. In this situation, it is proposed to use the method based on monitoring of oscillations and acoustic emission, which has long proved to be an effective tool in the study of phase transformations and plastic deformation. The appearance of a process with high vibroacoustic activity under irradiation of plates made of pre-nitrated steel 08Cr17Ti with a deposited film Nb70Hf22Ti8 in the range of 11–22 kHz 10 ms after the electronic pulse was experimentally shown on this background. The source of this vibroacoustic signal is a change in the microstructure of the alloy, including the appearance of a martensitic component in the near-surface layer of the sample caused by the formation of nitride based on niobium. Tracking changes in the effective value of the vibroacoustic signal allow choosing the rational modes of irradiation with electron-beam surface alloying, involving the supply of maximum power, limited by the possibility of evaporation of the film with alloying components.

Selective electron beam surface alloying of aluminum with TiCN nanoparticles

2019 ◽  
Vol 440 ◽  
pp. 88-94 ◽  
Author(s):  
V. Angelov ◽  
M. Ormanova ◽  
D. Kaisheva ◽  
R. Lazarova ◽  
R. Dimitrova ◽  
...  
Keyword(s):  
Electron Beam ◽  
Surface Alloying ◽  
Beam Surface

scholarly journals Electron beam surface alloying of carbon steel by aluminium followed by micro-arc oxidation

2018 ◽  
Vol 1115 ◽  
pp. 042065
Author(s):  
E V Yakovlev ◽  
A B Markov ◽  
P I Butaygin ◽  
S S Arbuzova ◽  
V I Petrov ◽  
...  
Keyword(s):  
Electron Beam ◽  
Carbon Steel ◽  
Surface Alloying ◽  
Micro Arc Oxidation ◽  
Beam Surface

Study on Electron Beam Alloying Micro-Structure and Wear Performance of 3Cr2W8V

2011 ◽  
Vol 189-193 ◽  
pp. 1316-1320
Author(s):  
Yuan Fang Chen ◽  
Chao Han ◽  
Kang Chen ◽  
Hong Bin Xu ◽  
Chun Huan Wang
Keyword(s):  
Electron Beam ◽  
Friction Factor ◽  
Surface Alloying ◽  
Micro Structure ◽  
Wear Performance ◽  
Abrasion Loss ◽  
Beam Surface ◽  
Modified Layer ◽  
The Times

Ti and TiN were deposited on mold steel 3Cr2W8V by PVD, then processed with the technology of electron beam surface alloying. The microstructure of modified and the influence of modified layer on wear performance of 3Cr2W8V were studied. The result shows that the section hardness of coating Ti material has increased by 35% at most when the times of treatment reach 25, the distribution of the section hardness is waved, the pick point of section hardness is at depth of 100μm to 200μm, The friction of coating Ti layer is decrease by 50% at most when the times of treatment reach 20, and the abrasion loss is totality descend by about 80%;the section hardness of coating TiN material has increased by 35% at most also when the times of treatment reach 25, the pick point of section hardness is at depth of 150μm to 250μm, the friction factor of material is waving with descend while the times of bombardment increased; the abrasion loss is totality descend by about 90%.

Formation and characterization of Al–Ti–Nb alloys by electron-beam surface alloying

2016 ◽  
Vol 389 ◽  
pp. 768-774 ◽  
Author(s):  
S. Valkov ◽  
P. Petrov ◽  
R. Lazarova ◽  
R. Bezdushnyi ◽  
D. Dechev
Keyword(s):  
Electron Beam ◽  
Surface Alloying ◽  
Beam Surface

Properties of TiN Coating Prepared on 3Cr2W8V by Electron Beam Surface Alloying Process

2011 ◽  
Vol 230-232 ◽  
pp. 698-703 ◽  
Author(s):  
Yuan Fang Chen ◽  
Xiao Dong Peng ◽  
Kang Chen ◽  
Jian Jun Hu ◽  
Hong Bin Xu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Electron Beam ◽  
Friction Coefficient ◽  
Corrosion Potential ◽  
Corrosion Current ◽  
Surface Alloying ◽  
Tin Coating ◽  
Wear And Corrosion ◽  
Beam Surface ◽  
Wear And Corrosion Resistance

TiN coating was deposited on 3Cr2W8V alloy by PVD and then processed with electron beam surface alloying process. The microstructure, microhardness, friction coefficient, amount of wear and corrosion resistance of electron beam treated specimens were investigated. It is shown that the electron beam treated specimens can improve the properties of material. The coating has an average microhardness of approximately HV800, the friction coefficient of electron beam irradiation treated specimens is considerably lower than that of TiN coating. When the electron beam irradiate times is appropriate, the roughness of surface will much lower, and it will achieve polishing effects. The corrosion behavior of the composite coating in 3.5% Nacl solution at room temperature was also determined using a potentiont state system. In comparion with the corrosion potential for 3Cr2W8V alloy, the corrosion potentials of TiN coating and electron beam treated specimen are increased respectively. The electron beam treated specimen has the lowest corrosion current density as well as the highest corrosion potential showing an improved corrosion resistance compared with 3Cr2W8V alloy.

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