Characterization of Surfaces in Wear Tests

2009 ◽  
pp. 18-18-14
Author(s):  
NS Eiss
Keyword(s):  
Wear Tests

Wear Behavior and Structural Characterization of a Nitrogen Implanted Ti6Al4V Alloy at Different Temperatures

1983 ◽  
Vol 27 ◽  
Author(s):  
R. Martinella ◽  
G. Chevallard ◽  
C. Tosello
Keyword(s):  
Wear Resistance ◽  
Structural Characterization ◽  
Wear Behavior ◽  
Hardened Layer ◽  
Structural Modifications ◽  
Theory Comparison ◽  
Different Temperatures ◽  
Nitrogen Ions ◽  
Wear Tests

ABSTRACTMechanically polished Ti6Al4V samples were implanted with 100 key nitrogen ions to a fluence of 5.1017 ions/cm2 at two different bulk tenneratures: 370°C and 470°C. Wear tests were carried out with a reciprocating slidina tribotester. Structural modifications and wear morphologies were studied by TEM and SEM. 370°C implanted sample showed the same wear behavior as unimplanted ones, while 470°C implanted sample showed better wear resistance because of a TiN hardened layer. Correlations- between microstructural modifications, wear behavior and mechanisms are reported: results agree with the delamination theory. Comparison with ion- and gas-nitrided samples are presented.

Synthesis and Characterization of CrXN Nano-Multilayer Coatings

2008 ◽  
Vol 373-374 ◽  
pp. 126-129
Author(s):  
H.Q. Li ◽  
X.Y. Li ◽  
Hai Lin Sun ◽  
Dennis Teer ◽  
Han Shan Dong
Keyword(s):  
Synthesis And Characterization ◽  
Multilayer Coatings ◽  
Closed Field ◽  
Wear Properties ◽  
Ion Plating ◽  
Unbalanced Magnetron ◽  
Magnetron Sputter ◽  
Crn Coatings ◽  
Wear Tests

Three types of nano-multilayer coatings, CrSiN, CrAlN and CrMoN, with different Si, Al and Mo contents were deposited on M42 substrates using a closed field unbalanced magnetron sputter ion plating (CFUMSIP) technique. Systematic characterization on the chemical composition, microstructure, hardness and wear properties of these multilayer coatings has been investigated using GDOES, low angle XRD, SEM, TEM, nanoindentation and wear tests. Experimental results revealed that all these three types of Cr, XN ternary coatings (X=Al, Si and Mo) are nano-multilayer structured. The CrAlN multilayer coatings showed the highest hardness and oxidation resistance among these three multilayer coatings. The CrMoN multilayer coatings exhibited the lowest friction coefficient although no appreciable improvements in wear resistance were observed as compared with the optimized CrN coatings.

Titanium-Based Sintered Alloy with Improved Wear Resistance

2020 ◽  
Vol 896 ◽  
pp. 270-275
Author(s):  
Stefan Gheorghe ◽  
Cristina Ileana Pascu ◽  
Claudiu Nicolicescu
Keyword(s):  
Wear Resistance ◽  
Sintered Alloy ◽  
Wear Properties ◽  
Friction Behavior ◽  
Low Wear ◽  
Sintered Alloys ◽  
Tribological Characterization ◽  
Alumina Ball ◽  
Wear Tests

Titanium sintered alloys have a special use in the technique because they have multiple advantages. Titanium and its alloys are characterized by remarkable physic-chemical, mechanical and technological properties. However, there are several such properties that have a lower value, such as friction behavior. Titanium and its alloys are recognized as having low wear resistance. Titanium alloyed with certain elements, such as tin or graphite, can lead to alloys with improved wear properties, with the specification that graphite does not exceed 1%. The technology of manufacturing titanium-based alloys is specific to powder metallurgy, but it also has some originality by choosing special sintering cycles. The paper aims to present a tribological characterization of the sintered TiAl alloy; the method uses the disc of the alloy that has been researched in contact with an alumina ball. The paper presents a detailed analysis of the wear tests carried out for four types of specimens obtained by different methods.

scholarly journals Mechanical characterization of the AISI 316L alloy exposed to boriding process

DYNA ◽  
2020 ◽  
Vol 87 (213) ◽  
pp. 34-41 ◽  
Author(s):  
Ricardo Andrés García-León ◽  
Jose Martinez-Trinidad ◽  
Ivan Campos-Silva ◽  
Wilbert Wong-Angel
Keyword(s):  
Sliding Wear ◽  
Standard Procedure ◽  
Indentation Test ◽  
Boride Layer ◽  
Aisi 316L ◽  
Low Carbon ◽  
X Ray Diffraction ◽  
Boriding Process ◽  
Wear Tests

In this study, the powder-pack boriding process on low-carbon stainless steel was carried out at 1273 K for 4 h of exposure to obtain a layer around ~57 μm conformed by FeB, Fe2B, and others alloying elements. Firstly, the presence of iron borides formed on the surface of borided AISI 316L alloy was confirmed by optical microscopy combined with the X-ray diffraction analysis. After, the sensed Vickers indentation test was performed on the iron boride layer to estimate the behavior of hardness and Young’s modulus. Sliding wear tests on the borided AISI 316L alloy were performed according to the ASTM G133-05 standard procedure, with the following conditions: distances of 50 and 150 m, normal loads of 5 and 20 N, and a sliding speed of 30 mm/s. Finally, the results showed that the presence of FeB-Fe2B improves the resistance to wear around 41 times compared to the untreated material.

Characterization of ion-beam-induced carbon deposition on WCCo hard metal by microhardness, scratch and abrasive wear tests

1987 ◽  
Vol 90 ◽  
pp. 343-347 ◽  
Author(s):  
J.-P. Hirvonen ◽  
J. Koskinen ◽  
A. Anttila ◽  
D. Stone ◽  
C. Paszkiet
Keyword(s):  
Abrasive Wear ◽  
Carbon Deposition ◽  
Ion Beam ◽  
Hard Metal ◽  
Wear Tests

scholarly journals ENERGY-BASED CHARACTERIZATION OF PRECISION HARD MACHINING USING PARTIALLY WORN CBN CUTTING TOOLS

2019 ◽  
Vol 19 (2) ◽  
pp. 55-62 ◽  
Author(s):  
Wit GRZESIK ◽  
Berend DENKENA ◽  
Krzysztof ZAK
Keyword(s):  
Tool Wear ◽  
Cutting Tools ◽  
Cutting Parameters ◽  
Point Of View ◽  
Depth Of Cut ◽  
Nose Radius ◽  
Additional Tool ◽  
Variable Feed Rate ◽  
Wear Tests

This paper highlights the performance of precision hard turning with CBN cutting tools from energy point- of-view with additional tool wear effect. For this purpose several wear tests were performed during which the tool nose wear VBC and the corresponding changes of component forces Fc, Ff and Fp were continuously measured. Based on the measured forces and geometrical characteristic of the uncut layer, specific cutting and ploughing energy were determined for several combinations of cutting parameters. Consequently, changes of energy consumption resulting from tool wear evolution for variable feed rate, depth of cut and tool nose radius were presented.

scholarly journals TRIBOLOGICAL PROPERTIES OF Ti-6Al-7Nb ALLOY AFTER ISOTHERMAL OXIDATION

Tribologia ◽  
2019 ◽  
Vol 285 (3) ◽  
pp. 5-12
Author(s):  
Krzysztof ANIOŁEK ◽  
Adrian BARYLSKI ◽  
Denis OSIOR
Keyword(s):  
Friction Coefficient ◽  
Tribological Properties ◽  
Isothermal Oxidation ◽  
Bearing Steel ◽  
Oxide Layers ◽  
Resistance To Sliding ◽  
Before And After ◽  
Wear Products ◽  
Wear Tests

The paper presents the characterization of tribological properties of the Ti-6Al-7Nb alloy before and after isothermal oxidation in different friction couples. Microscopic observations have shown that uniform oxide layers were obtained, which evenly covered the entire surface of the investigated samples. It was found that oxide layers deposited on the Ti-6Al-7Nb alloy substrate contribute to a considerable improvement of the tribological properties. The best resistance to sliding wear was shown by the layer obtained at a temperature of 600°C. It was also shown that presence of oxide layers on the surface of the Ti-6Al-7Nb alloy leads to an increase in the friction coefficient. The highest increase in the value of the friction coefficient was observed for a surface oxidized at 650°C during interaction with an Al2O3 ball. SEM observations of traces of the tribological interaction showed the presence of numerous scratches and fine wear products on the friction surface. For the non-oxidized condition, after interaction with a ball made of bearing steel 100Cr6, the presence was found of alternating, morphologically varied areas which had formed as a result of corrugation wear. Tests have shown that isothermal oxidation eliminates this disadvantageous phenomenon.

Wear Characterization of Thermal Sprayed and Fused Fe-Ni-Cr Alloy Coatings with the Addition of CeO2

2011 ◽  
Vol 239-242 ◽  
pp. 35-38
Author(s):  
Zhen Yu Zhang ◽  
Biao Chen ◽  
Bu Nv Liang ◽  
Peng Lin Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Steel Substrate ◽  
Sliding Speed ◽  
Worn Surface ◽  
Oxidation Wear ◽  
Wear Tests ◽  
Oxide Debris ◽  
Scanning Electron

Fe-Ni-Cr alloy powders with CeO2 were flame sprayed and fused on the surface of 1045 carbon steel substrate. The effect of CeO2 on microstructure and tribological behavior of coatings were studied experimentally by means of scanning electron microscopy (SEM), field emission gun scanning electron microscopy (FEGSEM), energy dispersive spectroscopy (EDS) and wear tests. The results show that an adhered oxide debris layer was formed on the worn surface in friction which contributed to decreased wear. Wear rate of the material increased with the load, but dramatically decreased at first and then slightly decreased the sliding speed. The friction coefficient of the material decreased slightly with the load, but increased with sliding speed at first, and then tended to be a constant value. Wear mechanism of the coatings was oxidation wear and a large amount of counterpart material was transferred to the coatings, the RE oxide in the debris layer contributes to the improvement in wear resistance.

Characterization of NiTi SMA in its unusual behaviour in wear tests

2019 ◽  
Vol 137 ◽  
pp. 313-323 ◽  
Author(s):  
Neonila Levintant-Zayonts ◽  
Grzegorz Starzynski ◽  
Mateusz Kopec ◽  
Stanislaw Kucharski
Keyword(s):  
Unusual Behaviour ◽  
Niti Sma ◽  
Wear Tests
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