scholarly journals A study of Characterization for High Velocity Oxygen-Fuel Coatings, I. Thermal and Mechanical Properties of High Velocity Oxygen-Fuel Sprayed MCrAlY Coatings.

1997 ◽  
Vol 46 (7) ◽  
pp. 763-768
Author(s):  
Yoshiyasu ITOH ◽  
Masahiro SAITOH ◽  
Masashi TAKAHASHI
Keyword(s):  
Mechanical Properties ◽  
High Velocity ◽  
High Velocity Oxygen Fuel ◽  
Thermal And Mechanical Properties ◽  
Mcraly Coatings ◽  
Oxygen Fuel

Characteristics of MCrAlY Coatings Sprayed by High Velocity Oxygen-Fuel Spraying System

1999 ◽  
Vol 122 (1) ◽  
pp. 43-49 ◽  
Author(s):  
Y. Itoh ◽  
M. Saitoh ◽  
M. Tamura
Keyword(s):  
Mechanical Properties ◽  
Residual Stress ◽  
High Velocity ◽  
Gas Turbines ◽  
High Velocity Oxygen Fuel ◽  
Hvof Spraying ◽  
Vacuum Plasma ◽  
Mcraly Coatings ◽  
Plasma Sprayed ◽  
Oxygen Fuel

High velocity oxygen-fuel (HVOF) spraying system in open air has been established for producing the coatings that are extremely clean and dense. It is thought that the HVOF sprayed MCrAlY (M is Fe, Ni and/or Co) coatings can be applied to provide resistance against oxidation and corrosion to the hot parts of gas turbines. Also, it is well known that the thicker coatings can be sprayed in comparison with any other thermal spraying systems due to improved residual stresses. However, thermal and mechanical properties of HVOF coatings have not been clarified. Especially, the characteristics of residual stress, that are the most important property from the view point of production technique, have not been made clear. In this paper, the mechanical properties of HVOF sprayed MCrAlY coatings were measured in both the case of as-sprayed and heat-treated coatings in comparison with a vacuum plasma sprayed MCrAlY coatings. It was confirmed that the mechanical properties of HVOF sprayed MCrAlY coatings could be improved by a diffusion heat treatment to equate the vacuum plasma sprayed MCrAlY coatings. Also, the residual stress characteristics were analyzed using a deflection measurement technique and a X-ray technique. The residual stress of HVOF coating was reduced by the shot-peening effect comparable to that of a plasma spray system in open air. This phenomena could be explained by the reason that the HVOF sprayed MCrAlY coating was built up by poorly melted particles. [S0742-4795(00)00701-8]

scholarly journals Investigation of Microstructure and Mechanical Properties of Welded Joints of Aluminum Alloys Welded with Titanium Based Powder Material by High Velocity Oxygen Fuel Spray Method (HVOF) Combined with Friction Stir Welding Method

2018 ◽  
Vol 1 (1) ◽  
pp. 558-564
Author(s):  
Hüseyin Köken ◽  
Hasan Kaya ◽  
Ramazan Samur ◽  
Mehmet Uçar
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Powder Material ◽  
Welded Joints ◽  
High Velocity ◽  
High Velocity Oxygen Fuel ◽  
Friction Stir ◽  
Aluminum Plates ◽  
Oxygen Fuel

In this study, spectral analyzes were performed to determine the chemical composition of the samples at 2x40x40 mm taken from aluminum alloy sheet materials. Plates to be combined with friction stir welding were mechanically cut with guillotine scissors at 2x100x300mm. The welded joints of the aluminum plates to be friction-mixed are coated with titanium-based powder material with a thickness of 40µm by high velocity oxygen fuel spraying (HVOF) method. A friction stir tool with a cone tip geometry with machining, 20mm shoulder diameter and 1.8mm pin height was produced for use in the friction stir welding process. In addition, the aluminum alloy sheets prepared were machined according to ASTM E8M-04 standard with dimensions of 2x100x300mm so that they could be joined with friction stir welding on the milling bench. Waterjet drawing and metallographic samples were cut from welded aluminum plates formed with parameters of 2000 rpm rotation speed and 140 mm / min welding speed and 2 degree head angle in accordance with ASTM E8M-04 standard. Tensile specimens were measured on the universal drafting table at a pulling speed of 2 mm / min along with the maximum tensile breaking values ??as well as percent elongation. In order to determine the microstructure and mechanical properties of the weld inserts, hot stamping of the samples, which were not affected by heat, was followed by coarse and fine sanding followed by final polishing with 1µm diamond paste. The hardness values of the samples were determined by Vickers hardness measurement along an axis to characterize the welded zone upper, middle and lower zones to cover all weld zones and the main material.

COLMONOY NO. 43HV

Alloy Digest ◽  
2008 ◽  
Vol 57 (7) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
High Velocity ◽  
Base Alloy ◽  
Heat Treating ◽  
High Velocity Oxygen Fuel ◽  
Nickel Base Alloy ◽  
Nickel Base ◽  
Oxygen Fuel

Abstract Colmonoy No. 43HV comprises a nickel-base alloy recommended for hard surfacing parts to resist wear, corrosion, heat, and galling. Deposits that have moderate hardness have increased ductility and slightly less resistance to abrasion than Colmonoy 53HV. Deposits can be finished by grinding or machined with carbide tooling. Colmonoy No. 43HV is supplied as an atomized powder specially sized for application with high-velocity oxygen fuel (HVOF) systems. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance and surface qualities as well as heat treating and surface treatment. Filing Code: Ni-664. Producer or source: Wall Colmonoy Corporation.

Sign in / Sign up

Export Citation Format

Share Document