An Experimental Study on Slurry Erosion Resistance of Single and Multilayered Deposits of Ni-WC Produced by Laser-Based Powder Deposition Process

Balu, Prabu; Hamid, Syed; Kovacevic, Radovan

doi:10.1007/s11665-013-0620-1

Cited by 10 publications

(9 citation statements)

References 29 publications

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“…Further, the researcher observed the delamination as the dominant erosion mechanism for material loss at normal impact angle, whereas ploughing and microcutting were observed as main mechanism for material loss under shallow impact angles conditions. Balu et al [122] investigated the effects of single and multi-layered WC-Ni based deposits using a laser cladding deposition technique. The research showed that the surface roughness (R a ) improves with an increment in the impingement angle.…”

Section: Studies Related To Slurry Erosion Prevention Using Laser Clamentioning

confidence: 99%

Laser cladding technique for erosive wear applications: a review

Singh

Goyal

Kumar

et al. 2020

Mater. Res. Express

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Slurry erosion is a serious menace in most of the hydro machine components all around the globe. Slurry erosion is accountable for heavy economic losses. However, some counter measures are being taken to mitigate the effect of sand particles passing through hydro-machine parts and research is also underway to improve the component surface by applying different surface coatings. Laser cladding is a surface deposition process that is used to achieve very good metallurgical bonding with minimum porosity as compared to other surface coating techniques. In this research paper, an attempt has been made to compile the literature related to laser cladding technology, its applications, process parameters, coating materials and their effectiveness to bestow solutions to various types of surface degradation with special emphasis on slurry erosion problems. This paper will serve as a reference for the researchers working in the area of slurry erosion prevention.Erosion is described as wear induced by solid particles hitting a surface, transferred via a gas flow or entertained in a fluid streaming medium [16]. The impinging angle of the particles and relative velocity determines the abrasive wear on a surface [17]. Hydro abrasive erosion depends upon several parameters such as size of sand, hardness, concentration, shape, quantity, and velocity, in most cases minimizing the impact energy of the particles by monitoring the parameters mentioned or indirectly. Despite this, enormous surface destruction to hydroelectric devices and structures occurs at any stage at a sufficiently elevated velocity, causing scratching and removal of material [18]. It has been learned that because of their excellent corrosion characteristics and acceptable resistance to strong particle erosion, in hydroelectric power plants stainless steels are widely used [16]. Bitter [19] suggested two erosion wear theories: cutting and deformation, according to him, the cutting wear is triggered by the particle velocity element parallel to the target surface, whereas the deformation wear is accountable for the normal component of the velocity. Some researchers [20-24] indicated that hardness of the target material or hardness of the impacting solid particles was dominant for wear of target surface. Wang and Yang [25] noted that a dominant function in the erosion process is the surface hardening of metals. The worn surfaces were analysed by scanning electron microscope and different wear processes such as micro-ploughing, lip formation, platelet, tiny indentation craters, and micro-cracking were described. It was reported that the depletion of materials such as metals and alloys was produced by the micro-cutting and microploughing of strong particles for ductile materials. The crack coalescence results in the removal of large-scale components for brittle materials.Material degradation by the dint of slurry erosion relies on myriad variables that can be classified into three primary groups: the first one associated with fluid flow circumstances (flow speed, partic...

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Section: Studies Related To Slurry Erosion Prevention Using Laser Clamentioning

confidence: 99%

Laser cladding technique for erosive wear applications: a review

Singh

Goyal

Kumar

et al. 2020

Mater. Res. Express

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“…Maximum rate of erosion at low and high angles of impact is usually termed as ductile mode and brittle mode of erosion. 20,21,30,34,35,44,45,68,69 In mixed Figure 1. Erodent shape affecting the erosion mechanism of ductile material at low impingement angle.…”

Section: Introductionmentioning

confidence: 99%

“…Industries suffering from slurry erosive wear problem often have to loose production time with frequent shut downs requiring repeated maintenance or replacement of equipments/ parts following a lot of expenses with high operational costs. 5,7,11,14,20,43,[57][58][59] In hydropower plants, outlines and structures of prominent components of turbines are often transformed because of massive silt content in water. SE induces the unceasing and regular mass dropping of targeted material.…”

Section: Introductionmentioning

confidence: 99%

“…8,9,14,27,31,36,57,58,66,[83][84][85][87][88][89][90][91][92] Some authors used the full factorial method for carrying out a suitable number of experiments. 93,94 Related to various researches, many authors 1,2,9,15,20,45,50,53,63,75,77,82,[94][95][96][97][98][99][100][101] discussed the surface morphologies of different materials posterior to SE testing, exhibiting the different mechanism of failure on the observed eroded surface. Surface roughness 'Ra' and 'Rz' are the parameters for characterizing such type of eroded surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…These include hydro-turbines with components such as buckets, guide vanes, runner blades, nozzles, top and bottom ring liners, needle labyrinths, inlet valve seals, faceplates and bearing bodies etc., earthmoving equipment, agricultural implements, casing and impellers of submersible pumps/centrifugal pumps, extruders, pipelines for slurry transportation, propellers and valves in the several kinds of industries named as hydro-power plants, thermal power plants, marine, oil and gas production, mining, dredging, petroleum, coal, chemical and ship building industries. 1–30…”

Section: Introductionmentioning

confidence: 99%

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Insights to improve the tribo-performance of materials used under slurry erosion applications: A review

Yadav

Singh²

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Slurry erosion usually results in the form of damage to the materials of different components having underwater working domain. Numerous industries have suffered due to this kind of wear resulting in frequent breakdowns demanding repeated financial assistance and poor productivity. Properties and tribo-performance of materials related to distinct slurry applications play a significant role in arresting the slurry erosion wear. Slurry erosion depends on different parameters such as impact velocity, impingement angle, shape and size of erodent, slurry concentration and so on. These parameters differ from one application to another and accordingly, specific materials are selected knowing the extent and severity of slurry erosion wear. In the last decade, many authors studied parametrically the tribo-slurry erosion performance of materials, few of them correlated their investigations to the actual in situ conditions of applications. Various authors have analyzed the effect of operating parameters on the mechanism of erosion and conducted the comparative studies of different materials. Many of the investigators attempted to improve the properties and tribo-slurry erosion performance of materials through surface modification techniques; coating, reinforcement, heat treatment, thermo-mechanical process etc. This review is an effort to covers all such kind of explorations.

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