Parametric Study of Slurry-Erosion of Hydroturbine Steels with and without Detonation Gun Spray Coatings using Taguchi Technique

Grewal, Harpreet Singh; Bhandari, Sanjeev; Singh, Harpreet

doi:10.1007/s11661-012-1148-y

Cited by 82 publications

(39 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The substrate steels were discovered to have an influence on the microstructure of the coating. When compared to the 16Cr/5Ni steel, the coating placed on the 13Cr/4Ni steel seemed to have more porosity and less micro-hardness [14].…”

Section: Coating Characterizationmentioning

confidence: 89%

Coating technology in hydro-turbines for sediment affected power plants: A review

Aryal

Chitrakar

Shrestha

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

The sediment loads originated from Run-off-river reaches to the turbines as suspended particles, causing wear and tear of the mechanical components. In the case of power plants under Himalayan Rivers, the turbines need to undergo repair and maintenance in a regular basis, due to a substantial loss of material from the turbine components. Past research works have focused on minimizing the erosion in turbines by changing the design of runner and guide vanes, strategically operation of the power plant during the monsoon season, as well as application of the coating materials over the susceptible regions. This paper studies the suitable coating technologies that could be implemented for hydro turbines, in the context of hydro power plants exposed to sediment particles. The review has shown numerous materials and approaches of applying the coating, their performance evaluation using experiments and important findings. This paper also discusses on different methods of characterizing the coating, mechanical integrity as well as the tribological behavior of the coated material.

show abstract

Section: Coating Characterizationmentioning

confidence: 89%

Coating technology in hydro-turbines for sediment affected power plants: A review

Aryal

Chitrakar

Shrestha

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…The angle is at or close to 90° for erosion failure includes lips formation mainly for the material which deforms at higher rate and the removal of material takes place in the form of platelets on repetitive striking of impacted erodent particles. However, the materials with minimum erosive wear resistance at 90° fall under the category of brittle mode [24].…”

Section: Erosion Testingmentioning

confidence: 99%

High Temperature Oxidation and Wear Resistant Bi-Layer Coating for Turbocharger Housing

Vasudev¹,

Thakur²,

Bansal³

2020

Methods for Film Synthesis and Coating Procedures

View full text Add to dashboard Cite

An upsurge in the demand of higher power generation has been observed in the last few decades. Consequently, the mechanical components of power generation are forced to operate in the extreme working conditions for longer duration, which results in the accelerated wear and corrosion of the material. Conventional material such as grey cast iron (GCI) is a preferred material of components used for power generation at high temperature. Grey cast iron exhibits poor wear and corrosion resistance at high temperature. On the other hand, an advanced material such as Alloy-718 is capable to withstand the high-temperature wear and oxidation for prolonged duration of time. In the current research, high temperature corrosion and erosive wear performance of grey cast iron (GCI) components has been enhanced by depositing a bi-layerAlloy-718/NiCrAlY coating by using high velocity oxy-fuel (HVOF) thermal spray process. Furthermore, the high temperature corrosion and erosion behaviour of GCI substrate and the deposited coating has been discussed. The various characterization techniques such as scanning electron microscopy (SEM) X-ray diffraction, and Vickers micro-hardness testing were conducted for the GCI substrate and Alloy-718 coating, respectively. The Alloy-718 coting showed the increased resistance against high-temperature erosion and oxidation, which can be attributed to its good bonding with the substrate, high hardness and formation of protective phases at high-temperature.

show abstract

“…Several deposition methods are used: e.g. the detonation-gun spray process [17], oxy fuel powder (OFP) process [18,19], wire arc spraying (WAS) process [18], high velocity oxy fuel (HVOF) process [19], physical vapour deposition (PVD) [20], plasma and flame spray methods (thermal sprayed coatings) [21], laser surface alloying (LSA) [15]. There are also other methods, which enhancement of slurry wear resitance, e.g.…”

Section: Slurry Erosion Phenomenonmentioning

confidence: 99%

Slurry Erosion – Design of Test Devices

Buszko

Krella

2017

Advances in Materials Science

View full text Add to dashboard Cite

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.

show abstract

Parametric Study of Slurry-Erosion of Hydroturbine Steels with and without Detonation Gun Spray Coatings using Taguchi Technique

Cited by 82 publications

References 34 publications

Coating technology in hydro-turbines for sediment affected power plants: A review

Coating technology in hydro-turbines for sediment affected power plants: A review

High Temperature Oxidation and Wear Resistant Bi-Layer Coating for Turbocharger Housing

Slurry Erosion – Design of Test Devices

Contact Info

Product

Resources

About