The Structure and Wear Resistance of the Surface Layers Obtained by the Atmospheric Electron Beam Cladding of TiC on Titanium Substrates

2014 ◽  
Vol 682 ◽  
pp. 14-20 ◽  
Author(s):  
Olga G. Lenivtseva ◽  
Daria V. Lazurenko ◽  
Vitaliy V. Samoylenko
Keyword(s):  
Wear Resistance ◽  
Electron Beam ◽  
Titanium Carbide ◽  
Volume Fraction ◽  
High Strength ◽  
Carbide Powder ◽  
Surface Layers ◽  
Matrix Morphology ◽  
Titanium Substrates ◽  
Carbide Particles

In this study the structure and properties of surface layers obtained on cp-titanium workpieces by non-vacuum electron beam cladding of titanium carbide powder were investigated. The structure of modified materials was examined by optical microscopy and scanning electron microscopy. It was shown that the cladded layer had a high quality and thickness of about 2.3 mm. The cladded layer microstructure consisted of high-strength titanium carbide crystals distributed in titanium matrix. Morphology of titanium carbide particles and their volume fraction changed in the direction from the surface layer to the heat affected zone. The average microhardness value of the cladded layer was ~500 HV. Surface alloyed layers were of higher wear resistance compared to cp-titanium.

Structure and Properties of Surface Layers Obtained by Atmospheric Electron Beam Cladding of Graphite-Titanium Powder Mixture onto Titanium Substrate

2014 ◽  
Vol 1040 ◽  
pp. 784-789 ◽  
Author(s):  
Olga G. Lenivtseva ◽  
Evgeniy Golovin ◽  
Vitaliy V. Samoylenko ◽  
Daria Mul ◽  
Dmitriy Golovin
Keyword(s):  
Wear Resistance ◽  
Electron Beam ◽  
Titanium Substrate ◽  
High Strength ◽  
Hardened Layer ◽  
Beam Current ◽  
Layer Growth ◽  
Electron Beam Current ◽  
Surface Layers ◽  
Resistance Level

The cladding of titanium and graphite powders on the cp-titanium workpieces using the electron beam injected to the atmosphere provided the formation of the surface layers with a high content of high-strength carbide particles. The main structural components in cladded layers are α-Ti (αʹ-Ti), titanium carbide and graphite. Electron beam current is the main technological parameter defining a thickness of the hardened layer. An increasing beam current ranged from 20 to 23 mA leads to the cladded layer growth up to 2.9 mm. However, in this case a significant decrease of the microhardness level and the wear resistance level of the cladded layer is not observed. An average microhardess value of the hardened layer is of 430 HV. Under the conditions of friction against fixed abrasive particles, a wear resistance level of the cladded layers is by 32-45 % larger than that of cp-titanium.

Effect of Titanium Carbide Particles on Mechanical Properties of Aluminum Matrix Composites

2017 ◽  
Vol 5 (2) ◽  
pp. 20-30
Author(s):  
Zaman Khalil Ibrahim
Keyword(s):  
Mechanical Properties ◽  
Titanium Carbide ◽  
Compression Strength ◽  
Volume Fraction ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Powder Metallurgy Technique ◽  
Carbide Particles ◽  
Properties Of Composites

In this research aluminum matrix composites (AMCs) was reinforced by titanium carbide (TiC) particles and was produced. Powder metallurgy technique (PM) has been used to fabricate AMCs reinforced with various amounts (0%, 4%, 8%, 12%, 16% and 20% volume fraction) of TiC particles to study the effect of different volume fractions on mechanical properties of the Al-TiC composites. Measurements of compression strength and hardness showed that mechanical properties of composites increased with an increase in volume fraction of TiC Particles. Al-20 % vol. TiC composites exhibited the best properties with hardness value (97HRB) and compression strength value (275Mpa).

The Structure, Microhardness and Wear Resistance of Coatings Obtained through Non-Vacuum Electron Beam Cladding of Chromium and Titanium Carbides on Low Carbon Steel

2018 ◽  
Vol 927 ◽  
pp. 13-19 ◽  
Author(s):  
Tatyana A. Krylova ◽  
Konstantin V. Ivanov ◽  
Vladimir E. Ovcharenko
Keyword(s):  
Wear Resistance ◽  
Electron Beam ◽  
Carbon Steel ◽  
Volume Fraction ◽  
Structural Characteristics ◽  
Low Carbon Steel ◽  
Structural Features ◽  
Low Carbon ◽  
Indentation Tests ◽  
Titanium Carbides

An interrelation between structural features, microhardness and wear resistance was studied in the coatings obtained by non-vacuum relativistic electron beam cladding of chromium and titanium carbides powder mixture on low carbon steel. Five coatings differing in the amount of the entered energy were investigated using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), indentation tests and wear resistance measurements. It was found that the concentration of alloying elements both in solid solution and eutectic as well as the volume fraction of eutectic are the main structural characteristics which defines the microhardness of the coatings. The distribution of TiC phase plays a key role in the resistance to wear.

FeNi-TiC Composite Powders Obtained by Electrolytic Co-Deposition

2011 ◽  
Vol 672 ◽  
pp. 133-136
Author(s):  
Nicolaie Jumate ◽  
Ioan Vida-Simiti ◽  
Dorel Nemeş ◽  
György Thalmaier ◽  
Niculina Sechel ◽  
...  
Keyword(s):  
Titanium Carbide ◽  
Nickel Alloy ◽  
Composite Powder ◽  
Carbide Powder ◽  
Metallic Ions ◽  
Composite Powders ◽  
The Matrix ◽  
Iron Nickel ◽  
Powder Particles ◽  
Carbide Particles

The paper presents a preliminary study on the obtaining of a composite powder by an electrolytic method. The composite powder particles are composed of iron nickel alloy that represents the matrix of the composite, and titanium carbide as the reinforcement. The matrix was obtained by electrolytic co-deposition from pure iron and nickel, in form of consumable electrodes. The titanium carbide powder is in suspension in the electrolyte. By the migration of metallic ions towards the cathode, the iron- nickel alloy is formed and, by simultaneously driving the carbide particles found in the electrolyte onto the cathode, the composite powder is obtained. The resulted composite powders were characterized by optical and electron microscopy. The influence of obtaining conditions over the morphology and structure of composite powders is emphased.

scholarly journals Effect of Nb Content on the Microstructure and Wear Resistance of Fe-12Cr-xNb-4C Coatings Prepared by Plasma-Transferred Arc Welding

Coatings ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 585
Author(s):  
Lin Zong ◽  
Yinglong Zhao ◽  
Shiteng Long ◽  
Ning Guo
Keyword(s):  
Wear Resistance ◽  
Volume Fraction ◽  
Eutectic Structure ◽  
Wear Process ◽  
Plasma Transferred Arc ◽  
Transferred Arc ◽  
Nb Content ◽  
Plasma Transferred Arc Welding ◽  
Carbide Particles ◽  
Nb Addition

The Fe-Cr-C coatings with different levels of Nb addition were prepared on carbon steel by a plasma transferred arc (PTA) weld-surfacing process and their microstructure and properties were investigated. As the Nb content increases from 8.96% to 12.55%, the coating gradually changes from a hypereutectic structure (martensite, austenite matrix, primary NbC and eutectic γ+M7C3) to a near eutectic structure (γ+M7C3 and NbC) and finally a hypoeutectic structure (primary γ, γ+M7C3 and NbC). As the Nb content increases, the hardness and wear resistance of the coating first increase and then decrease, which is closely related to the NbC volume fraction first increasing and then the NbC size coarsening. The Fe-Cr-C coating with 11.65% Nb balances the NbC content and size, and has the highest hardness and best wear resistance. As the Nb content increases further, the formation and aggregation of coarse NbC carbides in the coating results in high brittleness of the coating, which may cause the carbide particles to peel off the coating during the wear process, thereby reducing wear resistance.

scholarly journals Role of titanium carbide and alumina on the friction increment for Cu-based metallic brake pads under different initial braking speeds

Friction ◽  
2020 ◽  
Author(s):  
Tao Peng ◽  
Qingzhi Yan ◽  
Xiaolu Zhang ◽  
Yan Zhuang
Keyword(s):  
Wear Resistance ◽  
Titanium Carbide ◽  
Volume Fraction ◽  
Coefficient Of Thermal Expansion ◽  
Interface Bonding ◽  
Brake Pads ◽  
Reinforced Composite ◽  
The Poor ◽  
The Matrix

AbstractTo understand the effect of abrasives on increasing friction in Cu-based metallic pads under different braking speeds, pad materials with two typical abrasives, titanium carbide (TiC) and alumina (Al2O3), were produced and tested using a scale dynamometer under various initial braking speeds (IBS). The results showed that at IBS lower than 250 km/h, both TiC and Al2O3 particles acted as hard points and exhibited similar friction-increasing behavior, where the increase in friction was not only enhanced as IBS increased, but also enhanced by increasing the volume fraction of the abrasives. However, at higher IBS, the friction increase was limited by the bonding behavior between the matrix and abrasives. Under these conditions, the composite containing TiC showed a better friction-increasing effect and wear resistance than the composite containing Al2O3 because of its superior particle-matrix bonding and coefficient of thermal expansion (CTE) compatibility. Because of the poor interface bonding between the matrix and Al2O3, a transition phenomenon exists in the Al2O3-reinforced composite, in which the friction-increasing effect diminished when IBS exceeded a certain value.

The effect of the modification by ultrafine silicon carbide powder on the structure and properties of the Al-Si alloy

2020 ◽  
Vol 2 (101) ◽  
pp. 57-62
Author(s):  
T.M. Kovbasiuk ◽  
V.Yu. Selivorstov ◽  
Yu.V. Dotsenko ◽  
Z.A. Duriagina ◽  
V.V. Kulyk ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Particle Size ◽  
Volume Fraction ◽  
Cast Alloy ◽  
Metallographic Analysis ◽  
Carbide Powder ◽  
Surface Layers ◽  
First Time ◽  
Alloys Of The Al ◽  
Practical Implications

Purpose: Determine the possibility of modifying aluminium alloys of the Al-Si system with an ultrafine SiC modifier with a particle size of 3-5 μm. Design/methodology/approach: Processing of the Al-Si alloy was carried out by introducing an ultrafine modifier in the amount of 0.1, 0.2, or 0.3 wt.%. Silicon carbide (SiC) with a particle size in the range of 3-5 μm was used as a modifier. To study the microstructure of the formed surface layers, a metallographic analysis was performed according to the standard method on a microscope MIKPOTEX® MMT-14C using TopView software. Microhardness studies of the samples were carried out on a Vickers microhardness tester NOVOTEST TC-MKV1. The microstructure of castings of the AlSi12 grade was studied at magnification from 100 to 400 times on the horizontal and vertical surfaces of the samples after etching with a 2% NaOH aqueous solution. Findings: Aluminium cast alloy of Al-Si system has been synthesized with the addition of 0.1, 0.2, and 0.3 wt.% ultrafine SiC modifier. It was found that the modification of the AlSi12 alloy by SiC particles of 3-5 μm in size led to an improvement of its microstructure due to the reduction of the volume fraction of micropores and primary Si crystals. It was shown that the AlSi12 aluminium alloy due to the modification by 0.2 wt.% SiC has the best micromechanical properties and macrostructure density. Research limitations/implications: The obtained research results are relevant for cast specimens of the indicated sizes and shapes. The studies did not take into account the influence of the scale factor of the castings. Practical implications: The developed modification technology was recommended for use in the conditions of the foundry "Dnipropetrovsk Aggregate Plant" (Dnipro, Ukraine). Originality/value: The technology of AlSi12 alloy modification of ultrafine SIC modifier with a particle size of 3-5 μm was used for the first time.

scholarly journals Multi-cycle of AISI 5135 steel modification by irradiation of the “film (Si (0.2 μm) + Nb (0.2 μm))/(AISI 5135 steel) substrate” system with an intense pulsed electron beam

2021 ◽  
Vol 2064 (1) ◽  
pp. 012041
Author(s):  
N N Koval ◽  
Yu F Ivanov ◽  
V V Shugurov ◽  
A D Teresov ◽  
E A Petrikova
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Electron Beam ◽  
High Speed ◽  
Steel Substrate ◽  
High Hardness ◽  
High Strength ◽  
Pulsed Electron Beam ◽  
Impact Area ◽  
Steel Aisi

Abstract Steel AISI 5135 surface layer modification carried out by high-cycle high-speed melting of the “film (Si + Nb)/(steel AISI 5135) substrate” system with an intense pulsed electron beam with an impact area of several square centimeters, have been implemented in a single vacuum cycle on the “COMPLEX” setup. The regime of the system “film (Si (0.2 μm) + Nb (0.2 μm))/(steel AISI 5135) substrate” irradiation with an intense pulsed electron beam (20 J/cm2, 200 μs, 3 pulses, 3 cycles) which makes it possible to form a surface layer with high thermal stability have been revealed. This layer is characterized by high hardness, more than 3 times higher than the hardness of AISI 5135 steel in the original (ferrite-pearlite structure) and wear resistance, more than 90 times higher than the wear resistance of the initial AISI 5135 steel. It is shown that the high strength and tribological properties of steel are due to the formation of the hardening phase particles (niobium silicide of Nb5Si3 composition).

The study of the wear resistance of the surface layers silumin after electron beam treatment

2018 ◽  
pp. 23-27 ◽  
Author(s):  
D.V. Zagulyaev ◽  
◽  
V.E. Gromov ◽  
S.V. Konovalov ◽  
A.M. Glezer ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Electron Beam ◽  
Electron Beam Treatment ◽  
Surface Layers

Wear and corrosion behavior of Mg-based alloy reinforced with TiC and ZrC particles

2020 ◽  
Vol 62 (12) ◽  
pp. 1161-1172
Author(s):  
Hülya Kaftelen Odabasi ◽  
Akın Odabasi
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Volume Fraction ◽  
Matrix Alloy ◽  
Az91 Alloy ◽  
Corrosion Properties ◽  
Wear Performance ◽  
Wear And Corrosion ◽  
Corrosion Mechanisms ◽  
Carbide Particles

Abstract In this contribution, particle sizes of TiC (13 and 93 μm) and volume fractions of ZrC (5 and 10 vol.-%) with respect to reinforcement particles were varied to investigate the effects on the microstructure, hardness, density, wear and corrosion properties of AZ91 Mg matrix alloy. Experimental results revealed that the hardness, density and sliding wear performance of AZ91 alloy were markedly improved by the addition of carbide particles. Predominant wear and corrosion mechanisms were identified considering the size and volume fraction of the carbides. The composite sample comprising fine TiC particles (13 μm) exhibited the highest wear resistance at the same volume fraction as the coarse particles. Moreover, coarse ZrC particles with a low volume fraction (5 vol.-%) provided an enhanced wear resistance beyond that of the 10 vol.-% ZrC particles. Considering all the investigated composites, the corrosion resistance of the composites deteriorated with the increasing volume fraction and size of the carbide particles. Electrochemical measurements of the 0,5M NaCl solution revealed that increasing carbide particle size and volume fraction leads to lower corrosion resistance due to the formation of more cathodic areas which are preferred sites for the initiation of pitting corrosion.

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