scholarly journals An Influence of Factors of Flow Condition, Particle and Material Properties on Slurry Erosion Resistance

2019 ◽  
Vol 19 (2) ◽  
pp. 28-53 ◽  
Author(s):  
M. H. Buszko ◽  
A. K. Krella
Keyword(s):  
Material Properties ◽  
Erosion Resistance ◽  
Synergistic Effects ◽  
Impact Angle ◽  
Operating Conditions ◽  
Slurry Erosion ◽  
Particle Properties ◽  
Different Types ◽  
Degradation Of Materials ◽  
The Impact

AbstractThe degradation of materials due to slurry erosion is the serious problem which occurs in the power industries. The paper presents actual knowledge about an influence of individual factors connected with flow conditions, particles and material properties on the slurry erosion resistance. Among the factors connected with operating conditions, an influence of impact angle, and velocity of impact, particle concertation and liquid temperature have been described. In case of the factors connected with solid particle properties, an influence of the size, shape and hardness have been discussed. In the part devoted to the impact of material properties, due to different types of materials, the issues of resistance to erosion of slurries related to the properties of steel, ceramics and polymers are discussed separately. In the paper has been shown that a change of any of mentioned factors causes a change in the erosion rate due to the synergistic effects that accompany to slurry degradation.

Effect of Impact Angle on Slurry Erosion Behavior and Mechanisms of Carburized AISI 5117 Steel

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Y. M. Abd-Elrhman ◽  
A. Abouel-Kasem ◽  
K. M. Emara ◽  
S. M. Ahmed
Keyword(s):  
Erosion Resistance ◽  
Impact Angle ◽  
Silica Sand ◽  
Ductile Material ◽  
Hardness Profile ◽  
Slurry Erosion ◽  
Erosion Behavior ◽  
Nominal Size ◽  
Impact Angles ◽  
The Impact

The paper reports the influence of carburizing on the slurry erosion behavior of AISI 5117 steel using a whirling-arm rig. The microstructure and hardness profile of the surface layer of carburized steel were investigated. For characterizing the slurry damage process and for better understanding of material removal at different angles, scanning electron microscope (SEM) images at different locations on eroded surface using stepwise erosion combined with relocation SEM were presented. The study is also focused on studying the erosion wear resistance properties of AISI 5117 steel after carburizing at different impact angles. The tests were carried out with particle concentration of 1 wt. %, and the impact velocity of slurry stream was 15 m/s. Silica sand has a nominal size range of 250 – 355 μm was used as an erodent. The results showed that, carburizing process of steel increased the erosion resistance and hardness compared with untreated material for all impact angles. The erosion resistance of AISI 5117 steel increases by 75%, 61%, 33%, 10% at an impact angle of 30 deg, 45 deg, 60 deg, and 90 deg, respectively, as result of carburizing, i.e., the effectiveness of carburizing was the highest at low impact angles. Treated and untreated specimens behaved as ductile material, and the maximum mass loss appeared at impact angle of 45 deg. Plough grooves and cutting lips appeared for acute impact angle, but the material extrusions were for normal impact angles. The erosion traces were wider and deeper for untreated specimens comparing by the shallower and superficial ones for the carburized specimens. Chipping of the former impact sites by subsequent impact particles plays an important role in developing erosion.

scholarly journals Analysis of Dynamic Magnetoelastic Coupling in Mechanically Driven Magnetoelectric Antennas

Sensors ◽  
2022 ◽  
Vol 22 (2) ◽  
pp. 455
Author(s):  
Kevin Q. T. Luong ◽  
Yuanxun (Ethan) Wang
Keyword(s):  
Material Properties ◽  
New Technology ◽  
Operating Conditions ◽  
Dynamic Nature ◽  
Stepping Stones ◽  
Direct Role ◽  
Antenna Size ◽  
Magnetoelastic Coupling ◽  
The Impact ◽  
Analytical Expressions

Mechanically driven magnetoelectric antennas are a promising new technology that enable a reduction in antenna size by many orders of magnitude, as compared to conventional antennas. The magnetoelastic coupling in these antennas, a phenomenon playing a direct role in determining performance, has been modeled using approaches that are severely lacking in both accuracy and tractability. In response to this problem, we take a physics-based approach to the analysis of magnetoelastic coupling. We find that certain directions of applied stress will maximize the coupling and we derive general expressions to quantify it. Our results are applied in comprehensive simulations that demonstrate the dynamic nature of the coupling as well as the impact of various operating conditions and material properties. Our work contributes analytical expressions and associated insight that can serve not only as guidelines for the design of mechanically driven magnetoelectric antennas, but also as stepping stones towards the development of more accurate models.

Slurry Erosion Behaviors of Pseudoelastic TiNi Alloy

2007 ◽  
Author(s):  
Renbo Xu ◽  
Lishan Cui ◽  
Yanjun Zheng ◽  
Siwei Zhang
Keyword(s):  
Stainless Steel ◽  
Erosion Resistance ◽  
Deformation Mode ◽  
Experimental Results ◽  
Material Surface ◽  
Tini Alloy ◽  
Erosion Process ◽  
Slurry Erosion ◽  
Pile Up ◽  
The Impact

The slurry erosion behaviors of pseudoelastic TiNi alloy were studied using the liquid/solid impingement system and compared with SUS 630 and 2Cr12NiMo1W1V alloy. The influences of erosion time and angle on erosion resistance of three materials were surveyed. The experimental results show that TiNi alloy has the highest erosion resistance among the three materials and SUS 630 stainless steel is more resistant than 2Cr12NiMoW1V alloy. The KQL-300 indentation tester was used to simulate the impact of particle on material surface during erosion process. The results show that the deformation mode of indention can be pile-up or sink-in and there is a good correlation between erosion resistance of material and its indentation deformation mode. The sink-in deformation mode indicates the higher resistance to erosion, and the pile-up deformation mode implies the lower erosion resistance.

Slurry Erosion Performance of Ni + B4C Microwave Composite Clads

2020 ◽  
Vol 142 (5) ◽  
Author(s):  
M. Minhaj ◽  
Bhupinder Singh ◽  
Sunny Zafar
Keyword(s):  
Alloy Powder ◽  
Erosion Resistance ◽  
Steel Substrate ◽  
Microstructural Characterization ◽  
Impact Angle ◽  
Slurry Erosion ◽  
Carbide Phases ◽  
Erosion Test ◽  
Microwave Hybrid Heating ◽  
Resistance Performance

Abstract A composite clad of Ni-based alloy and B4C was developed on austenitic steel substrate through microwave hybrid heating. The B4C was added with Ni-based alloy powder in various weight proportions (0%, 5%, 10%, and 20%). The clads were investigated for the microstructural details, nanohardness and slurry erosion performance. Silt collected from river Uhl was used as the erodent for the slurry erosion test. Slurry erosion performance of the clads was evaluated at an impact angle of 90 deg and jet velocity of 40 m/s. Microstructural characterization confirms the uniform distribution of hard (boride and carbide) phases in the Ni-based matrix of the microwave composite clads. The presence of hard phases in the Ni-based matrix enhanced the slurry erosion resistance performance.

scholarly journals Experimental Evaluation of Erosion of Gunmetal under Asymmetrical Shaped Sand Particle

2015 ◽  
Vol 2015 ◽  
pp. 1-31 ◽  
Author(s):  
Mohammad Asaduzzaman Chowdhury ◽  
Uttam Kumar Debnath ◽  
Dewan Muhammad Nuruzzaman ◽  
Md. Monirul Islam
Keyword(s):  
Impact Velocity ◽  
Wear Behavior ◽  
Maximum Level ◽  
Impact Angle ◽  
Operating Conditions ◽  
Silica Sand ◽  
Sand Particle ◽  
Damage Propagation ◽  
Erosion Efficiency ◽  
The Impact

The erosion characteristics of gunmetal have been evaluated practically at different operating conditions. Asymmetrical silica sand (SiO2) is taken into account as erodent within range of 300–600 μm. The impact velocity within 30–50 m/sec, impact angle 15–900, and stand off distance 15–25 mm are inspected as other relevant operating test conditions. The maximum level of erosion is obtained at impact angle 15° which indicates the ductile manner of the tested gunmetal. The higher the impact velocity, the higher the erosion rate as almost linear fashion is observed. Mass loss of gunmetal reduces with the increase of stand-off distance. A dimensional analysis, erosion efficiency (η), and relationship between friction and erosion indicate the prominent correlation. The test results are designated using Taguchi’s and ANOVA concept.S/Nratio indicates that there are 1.72% deviations that are estimated between predicted and experimental results. To elaborately analyze the results, ANN and GMDH methods are mentioned. After erosion process of tested composite, the damage propagation on surfaces is examined using SEM for the confirmation of possible nature of wear behavior. The elemental composition of eroded test samples at varying percentage of gunmetal is analyzed by EDX analysis.

Stepwise Erosion as a Method for Investigating the Wear Mechanisms at Different Impact Angles in Slurry Erosion

2014 ◽  
Vol 136 (2) ◽  
Author(s):  
Y. M. Abd-Elrhman ◽  
A. Abouel-Kasem ◽  
S. M. Ahmed ◽  
K. M. Emara
Keyword(s):  
Rebound Effect ◽  
Impact Angle ◽  
Silica Sand ◽  
Slurry Erosion ◽  
Nominal Size ◽  
Erosion Mechanisms ◽  
Impact Angles ◽  
The Impact ◽  
Calculated Number ◽  
Number Of Particles

In the present work, stepwise erosion technique was carried out to investigate in detail the influence of impact angle on the erosion process of AISI 5117 steel. The number of impact sites and their morphologies at different impact angles were investigated using scanning electron microscope (SEM) examination and image analysis. The tests were carried out with particle concentration of 1 wt. %, and the impact velocity of slurry stream was 15 m/s. Silica sand—which has a nominal size range of 250–355 μm—was used as an erodent, using whirling-arm test rig. The results have shown that the number of craters, as expected, increases with the increase in the mass of erodent for all impact angles and this number decreases with the increase of the impact angle. In addition, the counted number of craters is larger than the calculated number of particles at any stage for all impact angles. This may be explained by the effect of the rebound effect of particles, the irregular shape for these particles, and particle fragmentation. The effect of impact angle based on the impact crater shape can be divided into two regions; the first region for θ ≤ 60 deg and the second region for θ ≥ 75 deg. The shape of the craters is related to the dominant erosion mechanisms of plowing and microcutting in the first region and indentation and lip extrusion in the second region. In the first region, the length of the tracks decreases with the increase of impact angle. The calculated size ranges are from few micrometers to 100 μm for the first region and to 50 μm in the second region. Chipping of the former impact sites by subsequent impact particles plays an important role in developing erosion.

scholarly journals Characterization of a coating 316L applied by plasma transferred arc

2018 ◽  
Vol 72 (3) ◽  
pp. 139-147 ◽  
Author(s):  
Aleksandar Maslarevic ◽  
Gordana Bakic ◽  
Milos Djukic ◽  
Bratislav Rajicic ◽  
Vesna Maksimovic
Keyword(s):  
Erosion Resistance ◽  
Base Material ◽  
Impact Angle ◽  
Coating Material ◽  
Filler Material ◽  
Plasma Transferred Arc ◽  
Short Period ◽  
Transferred Arc ◽  
The Impact

Parts of industrial machines and structures are often exposed to the action of aggressive environments, which in a short period of time can provoke the loss of their integrity. It is well known that for extending the service life against erosion and corrosion, protection of the exposed structure zone by coating is frequently used. Various application methods of protective coatings are applied, and the most common are welding and thermal spraying processes. The aim of this study was characterization of coatings made of stainless steel 316L, widely used in chemical and petrochemical industries. The coating was applied on a structural steel S235JR by plasma transferred arc using powder as a filler material. Due to a number of advantages, the plasma transferred arc (PTA) surfacing process has found significant usages in the field of surface protection. This paper presents results of hardness measurements in characteristic zones of the coating and the base material, as well as microstructural characterization of coatings using optical and scanning electron microscopy. Results of EDS analysis of the coating and hardness measurements indicated that a relatively high dilution (26.1 %) of the base material (BM) and the filler material (FM) occurred in a very narrow zone above the fusion line, and thus did not significantly affect the chemical composition of the rest of the coating. Also, erosion resistance tests of coatings were performed by changing the basic functional parameters that is the impact angle and the speed of erodent particles. It was observed that the erosion resistance of the coating material decreases approximately linearly with the increase of the particle speed. Also, with the increase of the impact angle of the erodent (up to 45 ?), the mass loss of the coating material is increased.

The effect of boronizing heat treatment on the slurry erosion of AISI 5117

2018 ◽  
Vol 70 (7) ◽  
pp. 1176-1186 ◽  
Author(s):  
Yasser Abdelrhman ◽  
Ahmed Abouel-Kasem ◽  
Karam Emara ◽  
Shemy Ahmed
Keyword(s):  
Erosion Resistance ◽  
Surface Hardness ◽  
Impact Angle ◽  
Impact Factors ◽  
Case Hardening ◽  
Steel Alloy ◽  
Slurry Erosion ◽  
Content Type ◽  
Erosion Mechanism ◽  
Impact Angles

PurposeThis paper aims to clarify the relationship between the slurry erosion and one of the case hardening treatments, i.e. boronizing in this study, for AISI-5117 steel alloy. AISI-5117 steel alloy was used because of its variety applications in the field of submarine equipment. Most of the slurry erosion factors such as velocity, impact angle and mechanism of erosion were studied at different impact angles.Design/methodology/approachAt first, the samples were prepared and subjected to the boronizing treatment in controlled atmosphere. By using a slurry erosion test-rig, all experiments for studying the slurry erosion factors were carried out. Moreover, the studied specimens were investigated via scanning electron microscope, optical microscope and X-ray diffraction to study the erosion mechanism in the different conditions.FindingsIt was expected that the boronization of the AISI-5117 steel would increase its slurry erosion resistance due to its positive impact on the surface hardness. However, the results observed show the opposite, where the boronization of AISI-5117 steel decreased its slurry erosion resistance as implied by the increase of the mass loss percentage at all impact angles.Originality/valueThis research, for the first time, exhibits the effect of boronizing treatment on the slurry erosion in different impact factors accompanied by the erosion mechanism at each impact angle.

Experimental apparatus development and mechanism analysis of multiform combined wears in ships under ocean operating conditions

2019 ◽  
Vol 234 (1) ◽  
pp. 33-41
Author(s):  
Liang Liang ◽  
Youxia Pang ◽  
Yong Tang ◽  
Zongming Zhu ◽  
Hao Zhang ◽  
...  
Keyword(s):  
Cavitation Erosion ◽  
Electrochemical Corrosion ◽  
Operating Conditions ◽  
Mechanism Analysis ◽  
Operational Environment ◽  
Slurry Erosion ◽  
Impact Speed ◽  
Ductile Materials ◽  
Experimental Apparatus ◽  
The Impact

Based on the operational environment of ships in the ocean, an experimental apparatus of the combined wear for slurry erosion, cavitation erosion, and electrochemical corrosion is designed and manufactured. The apparatus has two specimen zones, and it can simultaneously conduct several specimen tests for slurry erosion, cavitation erosion with or without the application of electrochemical corrosion. The impact speed, impact angle, environmental pressure, and other parameters are adjustable. The tests of three materials Q235, DH32, and NM360 steels are completed. The results show the wear is mainly slurry erosion and cavitation erosion for ductile materials of low strength and low hardness, and it is mainly corrosion for ductile materials of high strength and high hardness. Corrosion causes more damage to materials than slurry erosion and cavitation erosion. The wear degree of materials increases with the increase of the fluid impact speed.

scholarly journals SLURRY EROSION BEHAVIORS OF COPPER ALLOY BARREL OF MEASURE-MENT WHILE DRILLING

2021 ◽  
Vol 27 (1) ◽  
pp. 36-42
Author(s):  
Kang Jin Huang ◽  
Kun Xia Wei ◽  
Ke Zhang ◽  
Wei Wei ◽  
Qing Bo Du ◽  
...  
Keyword(s):  
Surface Damage ◽  
Impact Angle ◽  
Particle Impact ◽  
Slurry Erosion ◽  
Erosion Depth ◽  
Particle Properties ◽  
Measurement While Drilling ◽  
Computational Fluid Dynamics Cfd ◽  
Erosion Mechanisms ◽  
Surface Morphologies

Measurement while drilling (MWD) has been widely used in petroleum drilling engineering because it can realize borehole trajectory monitoring and improve the drilling speed. However, the slurry erosion will deteriorate and shorten the life of MWD. A user-defined function (UDF) code was developed to calculate the particle properties (particle impact velocity, particle impact angle and particle impact number) and erosion depth to understand the erosion process. The results show that the Realizable κ-ε model can accurately predict the erosion profile and the erosion depth is consistent with the experiment results. Furthermore, high pressure will aggravate surface damage and expand the area of slurry erosion. It has been demonstrated that computational fluid dynamics (CFD) and experimental approach can be used to identify and explain the erosion mechanisms in different regions where the surface morphologies reveal four erosion patterns, namely, micro-cutting, cracks, pits and plastic deformation.

Sign in / Sign up

Export Citation Format

Share Document