Study on plasma-spraying of MCrAlY coatings

Wang, Z. L.; Li, Q.; Ju, C.; Song, Q. H.; Sun, Z. P.; Zhang, Y. F.

doi:10.15251/djnb.2021.163.915

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The laser remelting method influences the substrate through the diffusion of alloying elements from the substrate to the coating. Wang et al [7] studied plasma-spraying of Amdry 962 and Amdry 997 on 45 steel substrates. The results show that the main composition of Amdry 962 coating was γ ′ -Ni 3 Al while several kinds of NiAl composites were observed in Amdry 997 coating.…”

Section: Introductionmentioning

confidence: 99%

Laser cladding of IN713 LC superalloy with Amdry 997 powder: microstructural evolution

Khorram¹

2023

Laser Phys.

View full text Add to dashboard Cite

In this research, Amdry 997 powder was applied by a laser cladding process to the IN713 Low Carbon (IN713 LC) nickel-based superalloy. To evaluate the microstructural behaviors of the clad zones, different variables (the laser speed, laser frequency, and pulse width) were used in the laser cladding process. The final aim of this study was to achieve a clad zone without obvious cracks and pores with a low dilution ratio. The results showed that the upper region of the cladding includes very small equiaxed dendrites. The middle region of the cladding includes columnar dendrites. Equiaxed and columnar grains can be formed at the interface region. With an increase in the heat input of the laser (increasing the pulse width and laser frequency or decreasing the laser speed), the solidification rate reduces and consequently, a longer solidification time exists. Hence, more elongated grains are formed at the interface region. The microstructure of coatings in the upper and middle regions includes γ-Ni, β-NiAl and γ′-Ni3Al phases and TaC carbide, whereas the microstructure of the coatings at the interface region includes γ and β-NiAl and γ′-Ni3Al phases and M (Mo, Ta)C carbide. The optimum laser parameters that result in a low dilution ratio (14%) and a dense clad zone without obvious crack and porosity are a laser speed of 140 mm min−1,laser frequency of 14 Hz, and pulse width of 9 ms.

show abstract

Section: Introductionmentioning

confidence: 99%

Laser cladding of IN713 LC superalloy with Amdry 997 powder: microstructural evolution

Khorram¹

2023

Laser Phys.

View full text Add to dashboard Cite

show abstract

“…Wang et al [17] used the plasma spray method to deposit Amdry 962 and Amdry 997 powders on steel 45. They observed that the main composition of Amdry 962 coating is γ'-Ni 3 Al, while several types of NiAl composites are present in Amdry 997 coating.…”

Section: Introductionmentioning

confidence: 99%

Development of a bilayer NiCrAlY/YSZ coating on IN713 LC superalloy by laser cladding

Khorram,

Nicknia

2023

Laser Phys.

View full text Add to dashboard Cite

In this study, bilayer laser cladding of Inconel 713LC superalloy was performed by a Nd:YAG laser. Amdry 997 powder was used as the first layer and Metco 204NS ceramic powder as the second layer. The experiments were carried out with different laser parameters to investigate the influence of heat input and laser power density on the microstructure and the hardness of coating. The study revealed that the susceptibility to crack formation in the clad zone increases with the increase in the heat input due to the high cooling rate and intense thermal stress. The formation of shrinkage cavities in the lower half of the clad zone raises with the increase in the heat input owing to reduction in the solidification rate. Microstructural investigations show that a cellular structure is formed at the interface region. The middle area of coating features columnar dendrites, while the upper area of the coating displays very small equiaxed dendrites. The coating mainly comprises γ-Ni, β-NiAl and γ′-Ni3Al phases and the elements of Ni, Co, Cr, Al, Ta, Zr, and Y are homogeneously distributed in the clad zone. As the heat input increases, the microhardness of the samples decreases due to an increase in the dilution ratio. This leads to a decrease of Co, Cr, and Ta elements in the γ′ and the β intermetallic compounds, as well as a reduction of Zr and Y elements in the clad zone.

show abstract

Study on plasma-spraying of MCrAlY coatings

Cited by 2 publications

References 0 publications

Laser cladding of IN713 LC superalloy with Amdry 997 powder: microstructural evolution

Laser cladding of IN713 LC superalloy with Amdry 997 powder: microstructural evolution

Development of a bilayer NiCrAlY/YSZ coating on IN713 LC superalloy by laser cladding

Contact Info

Product

Resources

About