Correlation between platinum–aluminide coating features and tensile behavior of nickel-based superalloy Rene®80

Barjesteh, Mohammad Mehdi; Abbasi, S.M.; Madar, Karim Zangeneh; Shirvani, Kourosh

doi:10.1007/s12598-019-01293-4

Cited by 7 publications

(10 citation statements)

References 23 publications

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“…As mentioned previously, large dimples have been observed in the cross section of coated specimens, this was because the test temperature (982 °C was well above the DBTT of the coating. Comparison of obtained results with the previous investigation (Barjesteh et al, 2019b) showed that the extent of the ductile fracture region was much more at 982 °C.…”

Section: Monotonic Stress-strain Behavior (Tensile Properties)supporting

confidence: 67%

“…The tensile test of superalloy coated and uncoated Rene ® 80 results and discussions obtained at 871 °C have been reported by us previously (Barjesteh et al, 2019b). The results are shown in Table 1.…”

Section: Monotonic Stress-strain Behavior (Tensile Properties)mentioning

confidence: 80%

“…Therefore, it can be expected that the presence of the coating would cause some degree of weakening of the base alloy. Fractographic studies of the uncoated and coated (6 μm Pt/LTHA) tensile specimens at 871 °C in the previous investigation (Barjesteh et al, 2019b) exhibited that the fracture mechanism was a mixed mode of ductile and brittle fracture. The results of the previous study also showed that most of the cracks nucleate from grain boundaries and propagate along them in the uncoated specimens, while cracks initiated from the coating surface in the coated specimens.…”

Section: Monotonic Stress-strain Behavior (Tensile Properties)mentioning

confidence: 89%

“…Results of tensile test on coated and uncoated Rene ® 80 alloy at 871 °C(Barjesteh et al, 2019b) Results of tensile test on coated and uncoated Rene ® 80 alloy at…”

mentioning

confidence: 99%

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Comportamiento a fatiga de baja frecuencia del compuesto Rene®80 recubierto de aluminuro de platino cerca y por encima del DBTT

et al. 2021

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La superaleación Rene®80 a base de Ni se utiliza para fabricar álabes de turbinas de gas en motores a reacción. La vida útil de algunas palas de turbina de motores a reacción está limitada por la fatiga de baja frecuencia y esta propiedad se ha visto fuertemente afectada por los revestimientos. La temperatura de transición de dúctil a frágil (DBTT) es el factor más importante que afecta las propiedades mecánicas de las aleaciones recubiertas. En este estudio, se evaluó el comportamiento de fatiga a alta temperatura y baja frecuencia del compuesto Rene®80 sin recubrimiento y recubierto con aluminuro de platino (Pt-Al) a temperaturas de 871 °C (cerca del DBTT) y 982 °C (por encima del DBTT). Los resultados de las pruebas de fatiga, en condiciones de deformación controlada a 871 °C para R = 0 y una tasa de deformación de 2×10-3 s-1, en un intervalo de deformación total de 0,8%, mostraron una disminución de la resistencia a la fatiga de las muestras recubiertas de aproximadamente un 14%, en comparación con las no recubiertas. Sin embargo, el aumento de la temperatura de prueba de 871 °C a 982 °C, condujo a un aumento en el comportamiento a fatiga de baja frecuencia del compuesto Rene®80 recubierto en aproximadamente un 10% en comparación con las muestras sin recubrir.

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Section: Monotonic Stress-strain Behavior (Tensile Properties)supporting

confidence: 67%

Section: Monotonic Stress-strain Behavior (Tensile Properties)mentioning

confidence: 80%

Section: Monotonic Stress-strain Behavior (Tensile Properties)mentioning

confidence: 89%

“…Results of tensile test on coated and uncoated Rene ® 80 alloy at 871 °C(Barjesteh et al, 2019b) Results of tensile test on coated and uncoated Rene ® 80 alloy at…”

mentioning

confidence: 99%

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Comportamiento a fatiga de baja frecuencia del compuesto Rene®80 recubierto de aluminuro de platino cerca y por encima del DBTT

et al. 2021

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“…High temperature creep under elevated centrifugal stress leads to cracking of grain boundaries perpendicular to the principal stress axis that limits the life of the rotating blades. The temperature regime, for which creep is important in alloys is 0.5Tm < T < Tm, where, Tm is the melting temperature of the alloys [1,2].…”

Section: Introductionmentioning

confidence: 99%

Creep rupture properties of bare and coated polycrystalline nickel-based superalloy Rene®80

Barjesteh

Abbasi

Zangeneh-Madar

et al. 2021

J min metall B Metall

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Creep deformation is one of the life time limiting reasons for gas turbine parts that are subjected to stresses at elevated temperatures. In this study, creep rupture behavior of uncoated and platinum-aluminide coated Rene?80 has been determined at 760?C/657 MPa, 871?C/343 MPa and 982?C/190 Mpa in air. For this purpose, an initial layer of platinum with a thickness of 6?m was applied on the creep specimens. Subsequently, the aluminizing were formed in the conventional pack cementation method via the Low Temperature-High Activity (LTHA) and High Temperature-Low Activity (HTLA) processes. Results of creep-rupture tests showed a decrease in resistance to creep rupture of coated specimen, compared to the uncoated ones. The reductions in rupture lives in LTHA and HTLA methods at 760?C/657 MPa, 871?C/343 MPa and 982?C/190 MPa were almost (26% and 41.8%), (27.6% and 38.5%) and (22.4% and 40.3%), respectively as compared to the uncoated ones. However, the HTLA aluminizing method showed an intense reduction in creep life. Results of fractographic studies on coated and uncoated specimens indicated a combination of ductile and brittle failure mechanisms for all samples. Although, the base failure mode in substrate was grain boundary voids, cracks initiated from coating at 760?C/657MPa and 871?C/343. No cracking in the coating was observed at 982?C/190MPa.

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A review on the Cyclic Oxidation Behavior and Mechanical Properties of the Pt–Al-Coated Cast Ni-based Superalloys

Barjesteh

2023

Inter Metalcast

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Correlation between platinum–aluminide coating features and tensile behavior of nickel-based superalloy Rene®80

Cited by 7 publications

References 23 publications

Comportamiento a fatiga de baja frecuencia del compuesto Rene®80 recubierto de aluminuro de platino cerca y por encima del DBTT

Comportamiento a fatiga de baja frecuencia del compuesto Rene®80 recubierto de aluminuro de platino cerca y por encima del DBTT

Creep rupture properties of bare and coated polycrystalline nickel-based superalloy Rene®80

A review on the Cyclic Oxidation Behavior and Mechanical Properties of the Pt–Al-Coated Cast Ni-based Superalloys

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