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.

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.

EXPERIMENTAL STUDIES ON THE INFLUENCE OF ABRASIVE MATERIALS ON THE WEAR OF HARD-WEARING STEELS

Tribologia ◽  
2018 ◽  
Vol 281 (5) ◽  
pp. 133-141 ◽  
Author(s):  
Andrzej N. WIECZOREK
Keyword(s):  
Experimental Studies ◽  
Structural Steels ◽  
Operating Conditions ◽  
Ring Test ◽  
Test Rig ◽  
Wear Properties ◽  
Aggressive Action ◽  
Low Wear ◽  
Loss Of Mass ◽  
Wear Tests

The paper presents the wear properties of hard-wearing steels and structural steels used in mining and transport machines exposed to the aggressive action of the environment, which have been determined experimentally in the presence of diverse abrasive materials. The wear tests were carried out on a ring-on-ring test rig simulating the operating conditions of elements exposed to abrasive wear. The samples were subjected to tests in conditions of sliding contact, and the main destructive process was micro-cutting of the surface with loose corundum or quartz grain. In the case of the coal abrasive, only slight grinding in of the mating surfaces was observed. The loss of mass in the samples was measured as the parameter characterizing the wear. It was then used to determine the volume loss. Based on the results obtained, it was found that the wear resistance of hard-wearing steels was approximately four times higher as compared to S355J2 structural steel for the corundum and quartz abrasives. In the case of the coal abrasive, there was a relatively low wear for all of the materials examined.

Deep Cryogenic Treatment and CrN Coating Effects on Micro-Scale Abrasion of Aluminum Alloy AA 6101-T4

2014 ◽  
Vol 936 ◽  
pp. 1047-1055 ◽  
Author(s):  
Edgar S. Ashiuchi ◽  
Volker F. Steier ◽  
Cosme R.M. Silva ◽  
Tales D. Barbosa ◽  
Tiago F.O. Melo ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Wear Rate ◽  
Cryogenic Treatment ◽  
Deep Cryogenic Treatment ◽  
Low Wear ◽  
The Impact ◽  
Improve Wear Resistance ◽  
Wear Tests

The endurance of components made of aluminum and aluminum alloys is often limited by their low yield strength and by their low wear resistance. The aim of this paper is to investigate the effect of different methods that can improve wear resistance of aluminum alloys. As a first approach, a highly wear resistant chromium nitrite layer was deposited by plasma vapor deposition on the surface of the aluminum alloy AA 6101-T4. In the second method, an ultra-deep cryogenic treatment was selected. Both methods have been previously used to improve the wear resistance of other harder substrate materials, like tool steel. To investigate the impact of the two methods on the wear resistance of such alloy, micro abrasive wear tests were carried out and an analysis based on the Archard’s law was considered. The results showed a decrease of the wear rate by 29% and 26% for the coated and for the cryogenically treated specimens, respectively, when compared to the as received material. The work also investigated the performance of three different methods (Allsopp, Double Intercept and Polynomial AT) usually considered to calculate the wear rate of coated samples. The three methods presented similar measures of wear rate for the substrate and for the coating

Wear Properties and Surface Structure of Ion Implanted Glassy Carbon

1988 ◽  
Vol 100 ◽  
Author(s):  
Kazuo Yoshida ◽  
Kazuhiko Okuno ◽  
Gen Katagiri ◽  
Akira Ishitani ◽  
Katsuo Takahashi ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Wear Resistance ◽  
Mass Spectroscopy ◽  
Concentration Distribution ◽  
Amorphous Structure ◽  
Wear Properties ◽  
Depth Profiles ◽  
Secondary Ion ◽  
Wear Tests ◽  
Abrasive Paper

ABSTRACTWear properties of Li+, K+, C+, Cl+, and Ti+ implanted glassy carbons (GC) have been studied by wear tests using silicon carbide abrasive paper. It has been found that ion implantation is effective for improving wear resistance of GC. The measurements of Raman spectra revealed formation of an amorphous structure on the surface. Anomalous depth profiles with flat concentration distribution of Li and K atoms were observed by a secondary ion mass spectroscopy (SIMS). In conclusion. the formation of an amorphous structure seems to explain the improvement in wear resistance.

Microstructure and Wear Properties of Laser Clad TiN/Co-Based Composite Coating

2010 ◽  
Vol 97-101 ◽  
pp. 1510-1513
Author(s):  
Jun Zhou ◽  
Fa Qin Xie ◽  
Yong Quan Li ◽  
Xiang Qing Wu
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Composite Coatings ◽  
Solidification Rate ◽  
Optical Microscope ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
Wear Tests ◽  
Friction And Wear Tests ◽  
Metal Melting

Co-based composite coatings reinforced by TiN particles were fabricated on Ni-based superalloy substrate by using a 5 kW CO2 laser. The microstructures and phases constitution of the composite coating were studied by means of optical microscope (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The microhardness and wear resistance of the coating were also examined. The results showed that the composite coating was mainly composed of γ-Co, TiN, TiC, (Cr, W)23C6 and Co3Ti. And different solidification morphologies, such as planar, cellular and dendrite, were obtained. Structural transformations were attributed to the temperature gradient and solidification rate in metal-melting region. It was found that the microhardness of the composite coating was enhanced prominently as compared to the substrate region, which should be due to the undissolved TiN and other new complicated phase. Friction and wear tests without lubrication showed that the addition of TiN particles into Co-based coating can improve its wear resistance significantly without evidently increasing the friction coefficient of coating.

Micro/nanoscale structural, mechanical and tribological characterization of ZA-27/SiC nanocomposites

2019 ◽  
Vol 54 (16) ◽  
pp. 2113-2129
Author(s):  
Miroslav Babic ◽  
Blaza Stojanovic ◽  
Dragan Dzunic ◽  
Marko Pantic
Keyword(s):  
Matrix Material ◽  
Matrix Alloy ◽  
Density Level ◽  
Friction Behavior ◽  
Sic Nanoparticles ◽  
Mechanical And Tribological Properties ◽  
Wear And Friction ◽  
Nanoparticle Content ◽  
Tribological Characterization

The structural, mechanical and tribological properties of ZA-27/SiC nanocomposites were investigated at micro/nanoscale. The nanocomposites with different volume fractions of nano-sized SiC particles were produced using the compocasting technique. The microstructure of nanocomposites was characterized with formation of SiC nano agglomerates, which were relatively uniformly distributed. The increase in SiC content contributed to the uniformity of their distribution. Also, the phenomenon of particle segregation in the form of particle-rich clusters, as well as particle-porosity clusters, was identified. The density level of composites decreased with the increase of the SiC content. The porosity followed a reverse trend. The tendency for formation of local particle-porosity clusters was the highest in ZA-27/1% SiC nanocomposite, causing the highest level of porosity. Increasing percentage of SiC content was followed by the increase in micro/nanohardness of the composites. The results of micro/nanoscale tribotests revealed that the reinforcing with SiC nanoparticles significantly improved wear and friction behavior of ZA-27 matrix alloy. The rate of improvement increased with the increase of SiC nanoparticle content, load, and sliding speed. The highest degree of changes corresponded to the change of the SiC nanoparticle content from 0 to 1 wt%. The further decrease of wear with SiC content (from 1 to 5 wt%) was almost linear. The different tribological behavior of tested ZA-27 matrix and ZA-27/SiC nanocomposites was influenced by differences of intensity of adhesion resulted in transferred layers of matrix material onto worn surfaces of Al2O3 ball counterpart. The intensity of adhesion significantly decreased with the increase of SiC nanoparticle content.

WEAR PROPERTIES AND CHARACTERIZATION OF LASER-DEPOSITED NI-BASE COMPOSITES ON 304 STAINLESS STEEL

2020 ◽  
Vol 27 (10) ◽  
pp. 1950219
Author(s):  
ZHIYUAN LIU ◽  
GUANCHAO LI ◽  
JIANING LI ◽  
MENGZHEN WANG ◽  
HUIJUN YU ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Composite Coating ◽  
304 Stainless Steel ◽  
Test Results ◽  
Wear Properties ◽  
Properties And Characterization ◽  
Reinforced Composite ◽  
Nanocrystalline Particle

The amorphous phase (AP) and nanocrystalline particle (NP)-reinforced composite coating was fabricated by laser cladding (LC) of the Ni45-WC mixed powders on the 304 stainless steel. An LC technique favored APs as well as NPs to be formed due to their rapid cooling and solidification characteristics, so the wear resistance of the Ni-base coating was improved. Microstructures and wear resistance of the fabricated composite coating were studied extensively. The test results showed that the microhardness and wear resistance of this LC coating were enhanced under the actions of NPs, APs and the ceramics. The study of the laser synthesis of NPs provided a theoretical basis for improving the LC technique.

Micro/nanomechanical and tribological characterization of ultrathin amorphous carbon coatings

1999 ◽  
Vol 14 (6) ◽  
pp. 2328-2337 ◽  
Author(s):  
Xiaodong Li ◽  
Bharat Bhushan
Keyword(s):  
Wear Resistance ◽  
Amorphous Carbon ◽  
Carrying Capacity ◽  
Load Carrying Capacity ◽  
Carbon Coatings ◽  
Load Carrying ◽  
Tribological Characterization ◽  
Thick Coatings ◽  
Amorphous Carbon Coatings

Micro/nanomechanical and tribological characterization of ultrathin amorphous carbon coatings, deposited by filtered cathodic arc (FCA), direct ion beam (IB), electron cyclotron resonance plasma chemical vapor deposition (ECR-CVD), and sputter (SP) deposition processes on Si substrate have been conducted using a nanoindenter with a nanoscratch attachment and an accelerated ball-on-flat tribometer. Coating thicknesses of 20, 10, 5 nm and, for the first time, 3.5 nm coatings have been investigated. It was found the FCA coating exhibits the highest hardness and elastic modulus, followed by the ECR-CVD, IB, and SP coatings. In general, the thicker coatings exhibited better scratch/wear performance than the thinner coatings due to their better load-carrying capacity as compared to the thinner coatings. At 20 nm, the FCA and ECR-CVD coatings show the best scratch and wear resistance, while the IB and ECR-CVD coatings show the best scratch and wear resistance at 10 nm. Five nanometer thick coatings show reasonable scratch and wear resistance, while 3.5 nm thick coatings show extremely low load-carrying capacity and poor scratch and wear resistance. It appears that the 3.5 nm coatings studied are unfeasible for scratch and wear resistance applications as of now.

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