Slurry Erosion Characteristics and Erosive Wear Mechanisms of Co-Based and Ni-Based Coatings Formed by Laser Surface Alloying

Shivamurthy, R. C.; Kamaraj, M.; Nagarajan, R.; Shariff, S.M.; Padmanabham, G.

doi:10.1007/s11661-009-0092-y

Cited by 35 publications

(16 citation statements)

References 21 publications

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“…Tested materials can be divided into following groups: ferrous [5,15], cobalt-based [4,16] nickel-based [2,7,11], titnium-based [4] materials and bulk metallic glasses (BMG) e.g. zirconium-based bulk metallic glass (Zr 44 Ti 11 Cu 10 Ni 10 Be 25 ) [2]. In case of ductile ferrerous materials, e.g.…”

Section: Slurry Erosion Phenomenonmentioning

confidence: 99%

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Slurry Erosion – Design of Test Devices

Buszko

Krella

2017

Advances in Materials Science

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Degradation of material caused by impacts of a solid particle (erodent) suspended in a liquid is called slurry erosion and is a major problem in the hydropower and maritime industry. Slurry erosion depends on many factors, e.g. liquid and erodent velocity, size, shape, angle of impact, hardness and number of erodents, and strength of a target material. The various types of test devices have been designed to investigate an effect of mentioned parameters on material resistance. In the paper are described main types of the test apparatus showing their main advantages and disadvantages. Some results of slurry erosion resistance of few groups of materials are also presented.

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Section: Slurry Erosion Phenomenonmentioning

confidence: 99%

“…Among others jet type slurry device, this type of test rig is quite popular, it has been used by in Ref. [2,3,5,7,11,[40][41][42][43][44][45]. a) b) Fig.…”

Section: Jet Type Apparatusmentioning

confidence: 99%

Slurry Erosion – Design of Test Devices

Buszko

Krella

2017

Advances in Materials Science

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“…Kesavan et al 18 observed various types of precipitates in Ni-base PTA deposits on 316L SS substrate which favored hardness and wear performance. Shivamurthy et al 3 examined the slurry erosion properties and erosive wear mechanisms of laser surface alloyed Colmonoy 88 and Stellite 6 powders deposited on 13Cr-4Ni steels and highlighted the role of angle of impingement and particle size on these properties. Similarly, Ramachandran et al 19 while investigating the role of different testing variables found that the slurry concentration had a greater influence on the wear rate of PTA deposits than the particle size, speed of rotation and slurry bath temperature.…”

Section: Introductionmentioning

confidence: 99%

Laser power and scanning speed influence on the microstructure, hardness, and slurry erosion performance of Colmonoy-5 claddings

Savanth

Singh

Gill

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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A 4kW Yb: YAG solid-state disc laser, with a four-way co-axial cladding head with powder feeding technique was employed to fabricate single-layer clads of Ni-based hardfacing alloy (Colmonoy-5) on medium carbon steel (ASME SA105) substrate by varying the laser processing parameters namely, beam power level (designated as low: 1200 W, medium: 1400 W, and high: 1600 W) and scanning speed (designated as low: 300 mm/min, medium: 400 mm/min, and high: 500mm/min). The laser clads were evaluated for their microstructural characteristics, microhardness, and slurry erosive wear performance with an aim to understand the effect of process parametric variations on their properties. Microstructural analyses of the clads were carried out using an optical microscope and a field-emission scanning electron microscope with attached energy-dispersive X-ray spectrometer supplemented by their Vickers microhardness testing and X-ray diffraction examination. The variation in laser processing parameters exerted a strong influence on the microstructural features of the clads in terms of γ-Ni dendrite size as well as morphology and distribution of various complex precipitates such as Cr-carbides and borides with relatively uniform distribution observed for the clads corresponding to low laser power and high scanning speed. The variation in laser power had relatively a greater influence on microhardness than the scanning speed variation. Micro-cutting, plastic deformation, crater formation besides ploughing away of the softer matrix were the typical fracture features associated with slurry eroded clads when examined under field-emission scanning electron microscope. Results of the slurry erosive wear tests showed that the clads pertaining to low laser power and high scanning speed exhibited superior wear resistance as compared to their counterparts.

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“…It has been learnt from the literature that slurry erosion resistance of the target surface can be enhanced by improving the hardness of the target surface. Further, a thermal spray coating technique is one of the simple and economical methods for improving the hardness of the target surface [2][3][4][5][6][7][8]. Surface coatings with very good mechanical properties can be deposited by using High-Velocity Oxy-Fuel (HVOF) thermal spray process [9].…”

Section: Introductionmentioning

confidence: 99%

Erosion wear evaluation of HVOF sprayed WC-12Co coating on some pipeline materials using Taguchi approach

Singh¹,

Bansal²,

Goyal³

2020

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Pipeline materials used for the transportation of bottom ash slurry generally suffer from intense wear due to slurry erosion. In this work, High-Velocity Oxy-Fuel (HVOF) spray process was used for the deposition of WC-12Co coating on the Mild steel, SS 304 and SS 202. Slurry erosion pot tester was used for erosion tests of uncoated and coated materials. Effects of three factors namely slurry concentration, the speed of impacting particles and erosion test duration on erosion rate were investigated using the Taguchi approach. Influence of speed of impacting particles on the erosion rate of uncoated and all the coated materials was found to be maximum, which was followed by erosion test duration and then slurry concentration. WC-12Co coating showed significant improvement in erosion wear resistance of three substrate materials namely mild steel, SS 304 and SS 202. WC-12Co coating showed the brittle mechanism of erosion wear. After the Taguchi analysis slurry erosion results were further validated with analysis of variance (ANOVA). From both ANOVA and Taguchi analysis, it was observed that the influence of speed is maximum on the erosion wear of all the uncoated as well as WC-12Co coated specimens, followed by time and slurry concentration. K e y w o r d s : bottom ash, slurry erosion, pipeline steel, HVOF spray

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Slurry Erosion Characteristics and Erosive Wear Mechanisms of Co-Based and Ni-Based Coatings Formed by Laser Surface Alloying

Cited by 35 publications

References 21 publications

Slurry Erosion – Design of Test Devices

Slurry Erosion – Design of Test Devices

Laser power and scanning speed influence on the microstructure, hardness, and slurry erosion performance of Colmonoy-5 claddings

Erosion wear evaluation of HVOF sprayed WC-12Co coating on some pipeline materials using Taguchi approach

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