Stainless Steel Armor Plate Design for Protecting Supercavitating Baffle Blocks against Debris Impacts in High-Velocity Stilling Basins

Abstract The present paper describes the synthesis of nanocrystalline 316-stainless steel coatings by high velocity oxy-fuel (HVOF) thermal spraying. The feedstock powders were synthesized by mechanical milling to produce flake-shaped agglomerates with an average grain size of less than 100 nm. The powders were introduced into the HVOF spray to successfully produce nanocrystalline coatings. X-ray diffraction analysis and transmission electron microscopy were used to determine the average grain size of the milled powders. Scanning electron microscopy and transmission electron microscopy were used to study the morphology of the nanometric particles and the microstructure of the as-sprayed coatings. The properties of various coating materials were characterized by microhardness measurements performed on the polished surface of the cross section.

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Influence of Mechanical and Thermal Behaviour of Stainless Steel Powder Particles During High Velocity Oxy-Fuel (HVOF) Spraying on Properties of Coatings

Thermal Spray 1998: Proceedings from the International Thermal Spray Conference ◽

10.31399/asm.cp.itsc1998p0503 ◽

1998 ◽

Author(s):

V.V. Sobolev ◽

J.M. Guilemany ◽

A.J. Martin

Keyword(s):

Stainless Steel ◽

High Velocity ◽

Gas Flow ◽

Combustion Process ◽

Steel Powder ◽

Hvof Spraying ◽

Properties Of Coatings ◽

Flight Behaviour ◽

Process Gas ◽

Powder Particles

Abstract Influence of the in-flight behaviour of the stainless steel 316 powder particles during high velocity oxy-fuel (HVOF) spraying on the properties (porosity and level of oxidation) of the coating is studied. Modelling of the in-flight behaviour is undertaken which takes into account the combustion process, gas dynamics, gas-particle interactions, acceleration and deceleration of the gas flow, heat transfer in the particles and full thermal history of the particles including their melting, cooling and the possible solidification. The results obtained are used for the explanation of the experimental data on the coating porosity and level of oxidation.

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Microstructure and interfacial adhesion of high velocity oxy-fuel-sprayed MoB-CoCr alloy coating on 316L stainless steel

Surface and Interface Analysis ◽

10.1002/sia.3079 ◽

2009 ◽

Vol 41 (9) ◽

pp. 725-729 ◽

Cited By ~ 4

Author(s):

Heping Lv ◽

Pulin Nie ◽

Yonggen Yan ◽

Jun Wang ◽

Baode Sun

Keyword(s):

Stainless Steel ◽

High Velocity ◽

Interfacial Adhesion ◽

316L Stainless Steel ◽

Alloy Coating ◽

Cocr Alloy

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Impact of High-Velocity Oxy-Fuel ZrO2 Coating on Corrosion Resistance and Fatigue Life of AISI 316L Austenitic Stainless Steel

Advances in Materials Science and Engineering ◽

10.1155/2019/5719694 ◽

2019 ◽

Vol 2019 ◽

pp. 1-9

Author(s):

J. Jagadesh Kumar ◽

G. Diwakar ◽

Vaddi Venkata Satyanarayana

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Fatigue Life ◽

Austenitic Stainless Steel ◽

High Velocity ◽

Sea Water ◽

Water Environment ◽

Aisi 316L ◽

316L Austenitic Stainless Steel ◽

Marine Applications

Purpose. The purpose of this research paper is to investigate the corrosion and fatigue life of AISI 316L austenitic stainless steel in the absence and presence of high-velocity oxy-fuel ZrO2 coating. Design/Methodology/Approach. AISI 316L austenitic stainless steel is chosen for the investigation, keeping in mind, its widespread usage in naval and marine applications where the members are exposed to corrosive sea water environment. ZrO2 coating is a popular surface treatment provided to mechanical members to improve their corrosion resistance. Being a refractory material, ZrO2 inhibits the corrosion of the AISI 316L austenitic stainless steel in marine applications. But, the study of the effect of ZrO2 coating on the corrosion and fatigue life of the material hitherto is scarce and hence the present investigation is undertaken. The corrosion and fatigue analysis of the coated specimens are carried out by taking two control parameters, namely, rotational speed of job and axial speed of torch, into consideration and applying L4 Taguchi orthogonal array. Findings. The corrosion resistance of the material has increased but the fatigue strength has decreased upon coating of ZrO2 on AISI 316L austenitic stainless steel. The failure has occurred because of the formation of oxide layers on the steel during coating.

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