Oxidation behavior of ultra-high-strength 13Ni15Co10Mo maraging steel
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2021
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INTERNATIONAL CORROSION CONGRESS, 21st; INTERNATIONAL CORROSION MEETING, 8th
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Resumo
During solution annealing and aging of maraging steels an oxide layer is formed, usually
composed of hematite and/or magnetite. Exploratory analysis of the oxidized surface of 13Ni-15Co-10Mo (wt.%) maraging steel also indicated the presence of austenite. This maraging steel
presents ultra-high yield strength (~3 GPa), however, it shows lower toughness than other
maraging steel types and the austenite phase on the surface could obstruct crack initiation and
propagation improving toughness. The aim of this study was to investigate the microstructure
of the steel surface after oxidation in air by Scanning Electron Microscopy (SEM), Energy
Dispersive X-Ray Spectroscopy (EDX) and X-Ray Diffraction (XRD). Results showed that
there are three different regions after oxidation: bulk (constituted of martensite and nanometric
precipitates), an intermediate thin layer (composed by austenite, martensite and oxides) and an
external layer (constituted of oxides like hematite, magnetite and kamiokite). Chemical
microanalysis indicated that the intermediate layer is richer in Ni and Co (austenite stabilizers).
Besides identifying the different phases and chemical compositions through the material, from
the surface to the bulk, it was possible to understand how austenite is formed during oxidation.
Como referenciar
FONSECA, DANIELA P.M. da; LIMA, NELSON B. de; PADILHA, ANGELO F. Oxidation behavior of ultra-high-strength 13Ni15Co10Mo maraging steel. In: INTERNATIONAL CORROSION CONGRESS, 21st; INTERNATIONAL CORROSION MEETING, 8th, July 20-23, 2021, Online. Anais... Rio de Janeiro, RJ: Associação Brasileira de Corrosão - ABRACO, 2021. Disponível em: http://repositorio.ipen.br/handle/123456789/33243. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.