High-Temperature Erosive Wear Behavior of High-Velocity Oxy-Fuel Sprayed Cr3C225 (Ni20Cr) Coating on (AISI 316) Austenitic Steel

2020 ◽  
Vol 142 (7) ◽  
Author(s):  
Hemant Nautiyal ◽  
Pankaj Kumar Sharma ◽  
Rajnesh Tyagi
Keyword(s):  
High Temperature ◽  
Fly Ash ◽  
Wear Rate ◽  
Austenitic Steel ◽  
High Velocity ◽  
Wear Behavior ◽  
Air Jet ◽  
Coated Surface ◽  
Aisi 316 ◽  
Impact Angles

Abstract AISI 316 austenitic steel is extensively used in various components of power plants like boilers, boiler tubes and pipes, which suffer severe air jet erosion. Fly ash is a major erodent in that case. Present study is conducted to study the effect of Cr3C225 (Ni20Cr) coating on 316 substrates, when it is exposed to thermal power plant erosive conditions. High-velocity oxy-fuel deposition technique is used for coating. Major constituent of Indian fly ash is alumina, so alumina particles are taken as erodent. Erosion wear behavior is investigated for coated and uncoated conditions using an air jet erosion tester at 100 m/s impact velocity. Three impact angles, i.e., 30 deg, 60 deg, and 90 deg, and four working temperatures, room temperature, 200 °C, 400 °C, and 600 °C, were chosen to identify wear mechanism. Scanning electron microscopy and energy dispersive X-ray spectroscopy (EDX) were utilized to characterize the coated, uncoated, and eroded surface. Erosion behavior is correlated with micro hardness, roughness, and microstructure. Results reveal that the coated surface offers better erosion resistance than the uncoated surface. Substrate exhibits ductile wear behavior as it shows higher wear rate at low angle and decreases on increasing the impact angle, while coating offers good wear characteristics at 30 deg and 90 deg impact angles. An increase in working temperature favors wear rate increment for both coated and uncoated samples. However, coated samples exhibit ductile erosive behavior at high temperatures. Uncoated surfaces have micro-cutting and deformation as major erosive mechanisms. Whereas for coated samples at high temperature, oxide layer formation takes place and erosion takes place due to spalling of the oxides from the coated surface.

Effect of High Temperature on Wear Behavior of Stir Cast Aluminium/Boron Carbide Composites

2020 ◽  
Vol 22 (4) ◽  
pp. 1031-1046
Author(s):  
X. Canute ◽  
M. C. Majumder
Keyword(s):  
High Temperature ◽  
Wear Rate ◽  
Boron Carbide ◽  
Wear Behavior ◽  
Base Alloy ◽  
Weight Fraction ◽  
Sliding Velocity ◽  
Wear Properties ◽  
High Temperature Wear ◽  
The Matrix

AbstractThe need for development of high temperature wear resistant composite materials with superior mechanical properties and tribological properties is increasing significantly. The high temperature wear properties of aluminium boron carbide composites was evaluated in this investigation. The effect of load, sliding velocity, temperature and reinforcement percentage on wear rate was determined by the pin heating method using pin heating arrangement. The size and structure of base alloy particles change considerably with an increase of boron carbide particles. The wettability and interface bonding between the matrix and reinforcement enhanced by the addition of potassium flurotitanate. ANOVA technique was used to study the effect of input parameters on wear rate. The investigation reveals that the load had higher significance than sliding velocity, temperature and weight fraction. The pin surface was studied with a high-resolution scanning electron microscope. Regression analysis revealed an extensive association between control parameters and response. The developed composites can be used in the production of automobile parts requiring high wear, frictional and thermal resistance.

Effect Multiple Addition (TiO2 and Fly Ash) on Wear Behavior and Hardness of 2024 Al Alloy

2021 ◽  
Vol 1039 ◽  
pp. 201-208
Author(s):  
Ruaa A. Salman ◽  
Naser K. Zedin
Keyword(s):  
Wear Resistance ◽  
Fly Ash ◽  
Wear Rate ◽  
Wear Behavior ◽  
Weight Percent ◽  
Al Alloy ◽  
Sliding Speed ◽  
Multiple Addition

This research is devoted to study the effect of addition (2%) TiO2 with different weight percent of fly ash particulate (0, 2, 4, 6%) to 2024 Al alloy on the wear behavior and hardness. The alloy was fabricated by the liquid metallurgy method. The results founds that the wear rate decreased from 0.55 with 0% fly ash to 0.18 at addition percentage of 6% fly ash. Also, the results reveal increasing the samples wear rate with increasing the load and loaded time. The rate of wear was decreased with increasing the sliding speed. Also, the values of hardness increased from 120VH to 160VH with rising the fly ash from 0% to 6%. Keywords: Fly Ash addition, TiO2, 2024 Al Alloy, Wear Resistance, Hardness.

scholarly journals EFFECT OF DIFFRENT LOADS ON THE WEAR BEHAVIORS OF 5Cr5Mo2V STEEL AT 700 °C

2021 ◽  
Vol 55 (6) ◽  
Author(s):  
Zhixiong Bai ◽  
Hang Yang ◽  
Ning Su ◽  
Xiaochun Wu
Keyword(s):  
High Temperature ◽  
Crack Initiation ◽  
Wear Rate ◽  
Wear Behavior ◽  
Oxidative Wear ◽  
Test Load ◽  
High Temperature Wear ◽  
Holding Power ◽  
The Matrix ◽  
Matrix Evolution

The effect of different loads on the high-temperature wear behavior of 5Cr5Mo2V steel at 700 °C was investigated. Wear morphologies, oxide compositions and matrix evolution were studied. The results showed that the wear rate increased with an increased test load, and the wear mechanism transformed from abrasive-oxidative wear to adhesive-oxidative wear. The relation between a delaminated oxide layer and cracks in the matrix were investigated. The exfoliation of carbides and displacement difference between the matrix and carbides caused a crack initiation. The wear rate strongly related to carbides, and coarse M6C carbides with poor holding power led to a high wear rate. Besides, a diagram of wear characteristics under different loads was suggested in this work.

High temperature sliding wear behavior of press-extruded AA6061/fly ash composite

2010 ◽  
Vol 527 (6) ◽  
pp. 1501-1509 ◽  
Author(s):  
P.R.S. Kumar ◽  
S. Kumaran ◽  
T. Srinivasa Rao ◽  
S. Natarajan
Keyword(s):  
High Temperature ◽  
Fly Ash ◽  
Sliding Wear ◽  
Wear Behavior

High-Temperature Wear Behavior of the ZE41 Mg Alloy

2019 ◽  
Vol 969 ◽  
pp. 86-92 ◽  
Author(s):  
B.P. Chiranth ◽  
C. Siddaraju ◽  
R.K. Mishra ◽  
R. Sasikumar ◽  
R. Sathiskumar ◽  
...  
Keyword(s):  
High Temperature ◽  
Wear Rate ◽  
Wear Behavior ◽  
Combined Effects ◽  
Mechanism Study ◽  
High Temperature Wear ◽  
Delamination Wear ◽  
Wear And Friction ◽  
Pin On Disc ◽  
Equiaxed Grains

High-temperature wear and friction properties of ZE41 alloy were evaluated using a pin on disc tribometer. The microstructure of the alloy has the equiaxed grains of 72±20µm decorated with the rare earth rich precipitates. Result shows that wear rate decreases upto 100°C and then increases until 250°C for all the loading conditions. The wear mechanism study revealed that the underlying thin oxide tribolayer minimizes the wear rate upto 100°C. Above 100°C, thickening of oxide layer due to enhanced oxidation rate results in breakage of the layer. Further, the increase of temperature softens the alloy which deforms and fractures in the subsurface at low critical load resulting in more delamination wear. The combined effects of oxidation and delamination wear are accentuated with the increase of load and temperature resulting in the increase of the wear rate. Comparing the influence of load and temperature on the wear rate, contact load is more.

Microstructure and high-temperature friction and wear behavior of WC-(W,Cr)2C-Ni coating prepared by high velocity oxy-fuel spraying

2011 ◽  
Vol 206 (1) ◽  
pp. 82-94 ◽  
Author(s):  
Guo-Liang Hou ◽  
Hui-Di Zhou ◽  
Yu-Long An ◽  
Guang Liu ◽  
Jian-Min Chen ◽  
...  
Keyword(s):  
High Temperature ◽  
High Velocity ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Friction And Wear Behavior

Solid Particle Erosion-Wear Behavior of Alumina Ceramics at High-Temperature

2010 ◽  
Vol 177 ◽  
pp. 129-131 ◽  
Author(s):  
Xiao Jun Wang ◽  
Ming Hao Fang ◽  
Hao Ran Sun ◽  
Shao Ping Huang ◽  
Yan Gai Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Wear Rate ◽  
Solid Particle ◽  
Wear Behavior ◽  
Wear Particle ◽  
Solid Particle Erosion ◽  
Erosion Wear ◽  
Alumina Ceramics ◽  
Particle Erosion ◽  
Air Atmosphere

In this paper, effects of temperature and erosion-wear particle on solid particle erosion-wear behavior of alumina ceramics were studied. The erosion-wear experiments were performed using self-designed sand blasting high-temperature solid particle erosion-wear equipment in air atmosphere. The results show that alumina ceramics presented the characteristics of brittle fracture at the high temperature of 1200°C. Erosion-wear rate increased with increasing temperature and rise obviously above 1000°C. For the same kind of erosion-wear particles, the erosion-wear rate of samples increased with the larger particle size. For the different ones, the greater hardness, the more serious erosion-wear.

scholarly journals Room-Temperature and High-Temperature Wear Behaviors of As-Sprayed and Annealed Cr3C2-25NiCr Coatings Prepared by High Velocity Air-Fuel Spraying

Coatings ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1090
Author(s):  
Xuanzhen Liu ◽  
Xiaofeng Zhao ◽  
Fan Yang
Keyword(s):  
High Temperature ◽  
Microstructural Evolution ◽  
High Velocity ◽  
Friction And Wear ◽  
Room Temperature ◽  
Wear Behavior ◽  
Critical Role ◽  
Wear Properties ◽  
Annealed Coating ◽  
Steel Substrates

Cr3C2-25NiCr coatings were deposited on stainless steel substrates by high velocity air-fuel (HVAF) spraying. Friction and wear behaviors of as-sprayed and annealed coatings were investigated both at room-temperature (RT) and 600 °C (high-temperature, HT). The results show that annealing at 600 °C in air is effective to enhance the wear performances of the coating both at RT and HT. The enhanced wear resistance of annealed coatings is discussed from the oxide growth and the microstructural evolution of the coatings. The wear behavior of the annealed coating follows the abrasive mechanism at RT and changes to an oxidative wear at HT, in which formation of a tribo-oxide layer plays a critical role to reduce the friction coefficient and to protect the underlying coatings from abrasive damage. The findings of this work reveal the significance of oxide-scale growth and microstructural evolution on the HT wear behaviors of the Cr3C2-25NiCr coating, which provides strategies for enhancing the wear properties of such coatings for HT applications.

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