Influence of Grain Orientation on Friction and Wear Behavior in Quasicrystalline Alloys

2000 ◽  
Vol 643 ◽  
Author(s):  
Alan Duckham ◽  
Dan Shechtman ◽  
Benjamin Grushko
Keyword(s):  
Grain Orientation ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Icosahedral Phase ◽  
Friction And Wear Behavior ◽  
Decagonal Phase ◽  
Pin On Disc ◽  
Alnico Alloy ◽  
Electron Back Scattered Diffraction ◽  
Wear Tests

AbstractThe influence of grain orientation on the friction and wear behavior of single-phase quasicrystalline alloys is investigated. Pin-on-disc wear tests and friction coefficient measurements have been performed on bulk samples of icosahedral phase AlPdMn and decagonal phase AlNiCo alloys. Wear behavior has been evaluated by optical microscopy, scanning electron microscopy (SEM) and electron back-scattered diffraction (EBSD). Coefficient of friction values of the decagonal AlNiCo alloy are found to be widely scattered (between 0.03 and 0.55) compared to the far more consistent values of the icosahedral alloys. This is explained by considering the significant variation in wear behavior that is observed between different – sometimes adjacent – oriented grains in the decagonal specimens.

On the Lubrication Mechanism of SbSbS4

1982 ◽  
Vol 40 ◽  
pp. 530-531
Author(s):  
J. S. Harris ◽  
L.K. Ives ◽  
M. B. Peterson
Keyword(s):  
Laboratory Test ◽  
Friction And Wear ◽  
Solid Lubricant ◽  
Wear Behavior ◽  
Powder Form ◽  
Extreme Pressure ◽  
Lubrication Mechanism ◽  
Friction And Wear Behavior ◽  
Test Conditions ◽  
Wear Tests

Recent investigations have shown that SbSbS4 is a promising solid lubricant. It exhibits outstanding extreme pressure (EP) performance, and good antiwear behavior under laboratory test conditions. An investigation was undertaken to identify the mechanism by which SbSbS4 functioned when used as a lubricant in the dry powder form and as an additive to oils and greases. Friction and wear behavior of SbSbS^ was investigated using several different wear tests carried out in air at temperatures ranging from 20°C to 500°C.

Study on the Friction and Wear Behavior of PEEK Composites Filled With Nanometer Compounds and PTFE

2007 ◽  
Author(s):  
Xu-Dong Peng ◽  
Ji-Yun Li ◽  
Qun-Feng Zeng
Keyword(s):  
Friction And Wear ◽  
Wear Behavior ◽  
Weight Fraction ◽  
Compression Moulding ◽  
Friction Behavior ◽  
Friction And Wear Behavior ◽  
Fixed Weight ◽  
Peek Composite ◽  
Pin On Disc ◽  
Worn Surfaces

The friction and wear behavior of polyetheretherketone (PEEK) composites was investigated, which are reinforced with nanometer Al2O3 or nanometer TiO2 and blended with polytetrafluoroethylene (PTFE) in a fixed weight fraction of 10% and are prepared by heat compression moulding. The studies emphasized particularly on the nanometer Al2O3 filled PEEK composites. The tests were performed on a pin-on-disc test apparatus with a PEEK composite pin sliding against AISI 1020 carbon steel disc under dry friction conditions and were all carried out at room temperature. The worn surfaces of the PEEK composites were examined by scanning electron microscopy (SEM). Results indicated that the above PEEK composites exhibited lower friction coefficient and wear rate in comparison with the mixture of PEEK with PTFE. The SEM micrographs of the worn surfaces indicated that the scratched and ploughed marks appeared on the wear scar of PEEK filled with PTFE, while the scuffing on the worn surfaces of nanometer Al2O3/PTFE/PEEK was obviously abated. The optimal content of nanometer Al2O3 in the filled PEEK composite should be recommended as 6.5 wt %. The friction behavior of the nanometer TiO2/PTFE/PEEK composites was far better than that of the nanometer Al2O3/PTFE/PEEK composites under the same test conditions and with the same content of nanometer compounds, which was perhaps due to much more strong synergistic effect between nanometer TiO2 and PTFE than that between nanometer Al2O3 and PTFE.

Friction and Wear Behavior of Boronized Chromium for Biological Applications

2005 ◽  
Author(s):  
R. Ribeiro ◽  
S. Ingole ◽  
O. Juan ◽  
H. Liang ◽  
M. Usta ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Surface Characterization ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Work Piece ◽  
X Ray Diffraction ◽  
Friction And Wear Behavior ◽  
Pin On Disc ◽  
Dry Conditions ◽  
Wear Mode

Enhanced corrosion and wear resistance are crucially important to prolong the service life of biomaterials. Boronizing has been reported to enhance the wear resistance of pure chromium. In this research, we investigate friction and wear behavior of boronized chromium. Pin-on-disc tribometer was used to conduct the wear and friction tests. Experiments were conducted in dry conditions as well as in simulated body fluid (SBF). Fundamental aspects of wear mode and lubrication behavior were studied using surface characterization techniques such as TEM, and X-ray diffraction. Results showed evidence of tribo-chemical interactions between SBF and work piece materials.

Friction and Wear Behavior of Thermally Sprayed Al-Cu-Fe Quasicrystal Coatings

1997 ◽  
Author(s):  
S. De Palo ◽  
S. Usmani ◽  
S. Sampath ◽  
D.J. Sordelet ◽  
M. Besser
Keyword(s):  
Sliding Wear ◽  
Friction And Wear ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Friction And Wear Behavior ◽  
Coating Microstructure ◽  
Plasma Sprayed ◽  
Thermally Sprayed ◽  
Sprayed Coatings ◽  
Wear Tests

Abstract Gas atomized Al63Cu25Fe12 powders of varying size fractions were plasma sprayed to study the relationships between coating microstructure and tribological behavior. After spraying, annealing was performed on one of the coatings. Abrasion and sliding wear tests were performed on the coatings. The results indicate a correlation between the abrasion resistance and hardness of the coatings. Furthermore, sliding wear tests reveal lower coefficients of friction for the as-sprayed coatings compared to the annealed coatings.

scholarly journals Tribological behavior of Ti-6Al-4V and Ti-6Al-7Nb Alloys for Total Hip Prosthesis

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Mamoun Fellah ◽  
Mohamed Labaïz ◽  
Omar Assala ◽  
Leila Dekhil ◽  
Ahlem Taleb ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Hip Prosthesis ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Femoral Stem ◽  
High Strength ◽  
Wear Performance ◽  
Grain Structures ◽  
Pin On Disc ◽  
Wear Tests

The aim of the study is to evaluate the friction and wear behavior of high-strength alloys Ti-6Al-7Nb used in femoral stem and compare it with a Ti-6Al-4V alloy cylindrical bar corresponding to ISO 5832-3 part 3/01-07-199 standard. The tribological behavior was investigated by wear tests, using ball-on-disc and pin-on-disc tribometers. These tests consisted of measuring the weight loss and the friction coefficient of samples. The oscillating friction and wear tests have been carried out in ambient with oscillating tribotester in accordance with standards ISO 7148, ASTM G99-95a, and ASTM G133-95 under different conditions of normal loads (3, 6, and 10 N) and sliding speeds (1, 15, and 25 mm·s−1). As counter pairs, a 100Cr6 steel ball with 10 mm in diameter was used. Results show that the two alloys had similar friction and wear performance, although their grain structures and compositions are different. Occurrence of large frictional occurred, is probably caused by formation and periodic, localized fracture of a transfer layer. Higher friction with larger fluctuation and higher wear rate was observed at the higher siding speed. The Ti-6Al-4V wear mechanism transforms from ploughing and peeling off wear at low sliding speed to plastic deformation and adhesive wear.

Friction and Wear Behavior of Copper‐graphite Composites with Different Compositions in Water Environments

2021 ◽  
Vol 6 (6) ◽  
pp. 1288-1296
Author(s):  
Hongming Wie ◽  
Jianpeng Zou ◽  
Xiaoya Li ◽  
Cong Xiao
Keyword(s):  
Friction And Wear ◽  
Wear Behavior ◽  
Friction And Wear Behavior ◽  
Graphite Composites
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