Microstructural changes during solution and aging heat-treatments of MAR-M246 superalloy
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2017
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BRAZIL MRS MEETING, 16th
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Resumo
Solution and aging heat-treatments play a key role for the application of the
superalloys. The aim of this work is to evaluate the microstructure of the MARM246
nickel-based superalloy solutioned at 1200 and 1250°C for 330 min and
aged at 780, 880 and 980 °C for 5, 20 and 80 h. The γ′ solvus, solidus and liquidus
temperatures were calculated with the aid of the JMatPro software (Ni database).
The as-cast and heat-treated samples were characterized by SEM/EDS and SEMFEG.
The γ′ size precipitated in the aged samples was measured and compared
with JMatPro simulations. The results have shown that the sample solutioned at
1250°C for 330 min showed a very homogeneous γ matrix with carbides and cubic
γ′ precipitates uniformly distributed. The mean γ′ size of aged samples at 780 and
880 °C for 5, 20 and 80 h did not present significant differences when compared
to the solutioned sample. However, a significant increasing in the γ′ particles was
observed at 980 °C, evidenced by the large mean size of these particles after 80 h
of aging heat-treatment.
Como referenciar
BALDAN, RENATO; SILVA, ANTONIO A.A.P.; NUNES, CARLOS A.; COUTO, ANTONIO A.; GABRIEL, SINARA B.; ALKMIN, LUCIANO. Microstructural changes during solution and aging heat-treatments of MAR-M246 superalloy. In: BRAZIL MRS MEETING, 16th, September 10-14, 2017, Gramado, RS. Abstract... São Carlos, SP: Aptor Software, 2017. p. 823-823. Disponível em: http://repositorio.ipen.br/handle/123456789/31194. 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.