Three-dimensional characterization of an oxide scale on ATI 718Plus® superalloy.
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| Title: | Three-dimensional characterization of an oxide scale on ATI 718Plus® superalloy. |
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| Authors: | Kruk, Adam1 (AUTHOR) kruczek@agh.edu.pl, Lech, Sebastian1 (AUTHOR) slech@agh.edu.pl, Gil, Aleksander2 (AUTHOR) gil@agh.edu.pl, Cempura, Grzegorz1 (AUTHOR) cempura@agh.edu.pl, Agüero, Alina3 (AUTHOR) agueroba@inta.es, Wusatowska-Sarnek, Agnieszka M.4 (AUTHOR) agnieszka.wusatowska-sarnek@prattwhitney.com, Czyrska-Filemonowicz, Aleksandra1 (AUTHOR) czyrska@agh.edu.pl |
| Source: | Corrosion Science. Jun2020, Vol. 169, pN.PAG-N.PAG. 1p. |
| Subjects: | Heat resistant alloys, Nickel-chromium alloys, Crystal grain boundaries, Chemistry, Oxides |
| Abstract: | • FIB-SEM tomography supported by advanced TEM was an effective tool for 3D characterization of phases in oxidized 718Plus. • A discontinuous δ -Ni 3 Nb phase interlayer had formed directly underneath the Cr 2 O 3 scale. • Al 2 O 3 particles precipitated predominantly at grain boundaries. • Isolated chromia particles were present in the internal oxidation zone. • Nanosized γ phase precipitates enriched with Fe and Co were found within the Cr 2 O 3 scale. The presented study was devoted to the characterization of a scale formed on the ATI 718Plus® superalloy. Novel complementary techniques were applied to precisely describe the structure, chemistry, morphology of the scale as well as the spatial distribution of phases formed during oxidation. The study revealed a discontinuous interlayer of the δ -Ni 3 Nb phase that had developed underneath the protective Cr 2 O 3 scale. Al 2 O 3 particles, which had precipitated predominantly at grain boundaries, and isolated chromia particles were present in the internal oxidation zone. Nanosized γ phase precipitates enriched with Fe and Co were embedded into the scale. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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