Effect of Pt–aluminide bond coat on tensile and creep behavior of a nickel-base single crystal superalloy

Parlikar, Chandrakant; Satyanarayana, D.V.V.; Chatterjee, Dibyendu; Hazari, N.; Das, Dipak K.

doi:10.1016/j.msea.2015.05.051

Cited by 27 publications

(3 citation statements)

References 44 publications

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“…Influence of diffusion coatings on the creep life of the superalloy is equivocal and there are a few reports about the creep behavior of coated superalloys. Detrimental effect on creep life in Pt-Al coated AM1 (a nickel-based superalloy) at the temperature range of 850-1100 °C has been reported by Ref [7].…”

Section: Introductionmentioning

confidence: 79%

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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Section: Introductionmentioning

confidence: 79%

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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“…Currently, researchers have also conducted some studies on the failure behavior of PtAl coatings under complex muti-field coupling environments [8][9][10][11][12][13][14][15][16][17]. Most of them concentrated on the impact of different loading conditions, such as tension [8][9][10][11], creep [9][10][11][12][13][14][15], fatigue [16][17][18], and thermo-mechanical fatigue [19], on the mechanical properties of PtAl coatings from room temperature to the service temperature. In general, except for high-cycle fatigue at a high temperature, depositing the PtAl coating would decrease the mechanical strength of the substrate superalloy but improve its ductility at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pt on Stress Rupture Properties of Pt-Modified Nickel Aluminide Coatings at 1100 °C

Xue,

Yin,

Deng

et al. 2024

Materials

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Platinum plays a crucial role in the superior high-temperature oxidation resistance of Pt-modified nickel aluminide (PtAl) coatings. However, PtAl coatings usually serve in thermo-mechanical coupling environments. To investigate whether Pt contributes to the high-temperature mechanical properties of PtAl coating, stress rupture tests under 1100 °C/100 MPa were performed on PtAl coatings with varying Pt contents. The different coatings were obtained by changing the thickness of the electroplated Pt layer, followed by a diffusion heat treatment and the aluminizing process in the present work. The results of the stress rupture tests indicated that an increasing Pt content resulted in a significant decrease in the stress rupture life of PtAl-coated superalloys under 1100 °C/100 MPa. Theoretical calculations and microstructural analysis suggested that an increased coating thickness due to the Pt content is not the main reason for this decline. It was found that the cracks generated close to the substrate in high-Pt-coated superalloys accelerated the fracture failure.

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“…Crack initiation from the coating-substrate interface and growth into the substrate also occurs due to interdiffusion [8], microstructural degradation [13], and interfacial defects of coatings [14]. Generally, crack deflection depends on the energy release rate of the interface and substrate [15].…”

Section: Introductionmentioning

confidence: 99%

Two aspects of high interfacial strength regarding the cracking behaviour of MCrAlY-coated superalloys

Song

Huang

et al. 2023

Materials Science and Technology

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In this study, we investigated the cracking behaviour of MCrAlY-coated superalloys having different interfacial strengths. A cyclic damage-coupled cohesive zone model is proposed to describe the fatigue crack initiation and propagation at the interface between the coating and the substrate. Our results indicate that a high interfacial strength leads to a significant stress concentration owing to the increasing interfacial stiffness. Moreover, high interfacial strength delays interfacial crack propagation but promotes the accumulation of deformation energy in the substrate, which accelerates fatigue crack initiation in the substrate. This work shows two aspects of high interfacial strength and can provide new insights into coating design.

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Effect of Pt–aluminide bond coat on tensile and creep behavior of a nickel-base single crystal superalloy

Cited by 27 publications

References 44 publications

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

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

Effect of Pt on Stress Rupture Properties of Pt-Modified Nickel Aluminide Coatings at 1100 °C

Two aspects of high interfacial strength regarding the cracking behaviour of MCrAlY-coated superalloys

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