Three-dimensional characterization of an oxide scale on ATI 718Plus® superalloy

Kruk, Adam; Lech, Sebastian; Gil, Alain Manuel Chaple; Cempura, Grzegorz; Agüero, Alina; Wusatowska-Sarnek, Agnieszka M.; Czyrska‐Filemonowicz, A.

doi:10.1016/j.corsci.2020.108634

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…The bulk material microstructure was investigated in detail in our earlier study. The results of these investigations are presented in Refs [ 14 , 21 , 22 ].…”

Section: Resultsmentioning

confidence: 99%

“…The alloy undergoes a standard heat treatment: solution treatment at 968 °C (1 h, oil quenching) followed by two-step ageing at 788 °C (8 h, furnace-cooled) and 704 °C (8h, air-cooled). The resulting microstructure consists of a γ matrix (Ni-based solid solution) strengthened with spherical γ’-Ni 3 (Al, Ti, Nb) precipitates and plate-like η-Ni 6 AlNb precipitates formed mainly at grain boundaries [ 19 , 20 , 21 , 22 , 23 ]. Some other minor phases (primary carbonitrides, δ-Ni 3 Nb, η-Ni 3 Ti, and Ni 6 (Al,Ti)Nb particles and/or TCP phases) were also observed in the 718Plus depending on its exact chemical composition and heat treatment [ 19 , 23 , 24 ].…”

Section: Methodsmentioning

confidence: 99%

“…Details about sample preparation for SEM (sample cross-section with silica finish) and TEM/STEM (FIB lamellae) are given in Ref. [ 22 ].…”

Section: Methodsmentioning

confidence: 99%

“…The present study is a continuation of our earlier research on the effect of long-term thermal exposure as well as high temperature oxidation in dry air on the microstructure of ATI 718Plus superalloy. The results of these investigations were published in Refs [ 14 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

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Multiscale Characterization of an Oxide Scale Formed on the Creep-Resistant ATI 718Plus Superalloy during High-Temperature Oxidation

et al. 2021

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The ATI 718Plus® is a creep-resistant nickel-based superalloy exhibiting high strength and excellent oxidation resistance in high temperatures. The present study is focused on multiscale 2D and 3D characterization (morphological and chemical) of the scale and the layer beneath formed on the ATI 718Plus superalloy during oxidation at 850 °C up to 4000 h in dry and wet air. The oxidized samples were characterized using various microscopic methods (SEM, TEM and STEM), energy-dispersive X-ray spectroscopy and electron diffraction. The 3D visualization of the microstructural features was achieved by means of FIB-SEM tomography. When oxidized in dry air, the ATI 718Plus develops a protective, dense Cr2O3 scale with a dual-layered structure. The outer Cr2O3 layer is composed of coarser grains with a columnar shape, while the inner one features fine, equiaxed grains. The Cr2O3 scale formed in wet air is single-layered and features very fine grains. The article discusses the difference between the structure, chemistry and three-dimensional phase distribution of the oxide scales and near-surface areas developed in the two environments. Electron microscopy/spectroscopy findings combined with the three-dimensional reconstruction of the microstructure provide original insight into the role of the oxidation environment on the structure of the ATI 718Plus at the nanoscale.

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“…The bulk material microstructure was investigated in detail in our earlier study. The results of these investigations are presented in Refs [ 14 , 21 , 22 ].…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…Details about sample preparation for SEM (sample cross-section with silica finish) and TEM/STEM (FIB lamellae) are given in Ref. [ 22 ].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multiscale Characterization of an Oxide Scale Formed on the Creep-Resistant ATI 718Plus Superalloy during High-Temperature Oxidation

et al. 2021

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“…Over the years, many properties of 718Plus superalloy have been assessed, like mechanical properties, [16][17][18] oxidation resistance, [19][20][21] and phase stability. [11,22,23] Especially mechanical properties can be tailored in a broad range due to numerous available processing techniques [24,25] and heat treatment routes.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Microstructure and Mechanical Properties of ATI 718Plus® Superalloy After Graded Solution Treatment

Lech

Wusatowska-Sarnek

Wieczerzak

et al. 2022

Metall Mater Trans A

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The evolution of microstructure and mechanical properties of ATI 718Plus® superalloy subjected to a graded solution treatment was evaluated. Graded solution treatment was performed on a single bar of 718Plus superalloy for 1 hour within a temperature range of 907 °C to 1095 °C. It resulted in a graded microstructure investigated mainly by light microscopy, scanning-, and transmission electron microscopy. A quantitative analysis of identified phases was performed. Mechanical properties were assessed using the Vickers hardness test and correlated with the microstructural changes. The structure–property relationship between 718Plus superalloy microstructure and mechanical properties was established. The change of the γ phase grain size in the single-phase range did not affect the hardness in a meaningful manner. Significant increases in hardness were observed after the introduction of γ′ and η phases. Phase stability limits were determined experimentally and compared with those calculated using the Thermo-Calc software.

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On the preferential grain boundary oxidation of a Ni-Co-based superalloy

Shen

Kang

et al. 2022

Corrosion Science

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Three-dimensional characterization of an oxide scale on ATI 718Plus® superalloy

Cited by 6 publications

References 23 publications

Multiscale Characterization of an Oxide Scale Formed on the Creep-Resistant ATI 718Plus Superalloy during High-Temperature Oxidation

Multiscale Characterization of an Oxide Scale Formed on the Creep-Resistant ATI 718Plus Superalloy during High-Temperature Oxidation

Evolution of Microstructure and Mechanical Properties of ATI 718Plus® Superalloy After Graded Solution Treatment

On the preferential grain boundary oxidation of a Ni-Co-based superalloy

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