Creep behavior of conventional and Nb-modified as-cast MAR-M246 superalloy (2021)
- Authors:
- USP affiliated authors: COELHO, GILBERTO CARVALHO - EEL ; NUNES, CARLOS ANGELO - EEL ; CHAIA, NABIL - EEL ; ALKMIN, LUCIANO BRAGA - EEL
- Unidade: EEL
- DOI: 10.1016/j.msea.2021.141170
- Subjects: MATERIAIS; NIÓBIO; TÂNTALO; LIGAS REFRATÁRIAS
- Keywords: Creep; MAR-M246; Oxidation Ni-Based superalloys; Niobium; Tantalum
- Agências de fomento:
- Language: Inglês
- Abstract: Considering the lower cost of Nb and its chemical similarity to Ta, this work investigated the effect of complete replacement of Ta by Nb (in at.% basis) in MAR-M246 Ni-based superalloy for the automotive turbocharger applications. Conventional and Nb-modified polycrystalline MAR-M246 superalloys were prepared through vacuum induction melting and investment casting from commercial raw-materials. Creep tests were performed on the as-cast alloys in air, at 800 °C (475/500/550 MPa), 900 °C (300/350/400 MPa) and 1000 °C (150/200/225 MPa). Additional creep tests were carried out at 900 °C/350 MPa under high vacuum conditions to verify effects of oxidation on the creep behavior of the alloys. Both alloys presented similar creep behavior at 800 °C. At 900 °C and 1000 °C, the conventional alloy has shown better properties associated with less creep damages in the bulk and near the surface regions. Both alloys have a better creep life in high vacuum which revealed an important role of oxidation on the creep damage mechanisms of these alloys. The lower creep properties of Nb-modified alloy at T > 800 °C should be primarily associated with higher internal diffusivity in this alloy compared to the conventional one, leading to faster oxidation and microstructure degradation during the high temperature creep.
- Imprenta:
- Publisher: Elsevier
- Publisher place: Oklahoma-USA
- Date published: 2021
- Source:
- Título: Materials science and engineering a-structural materials properties microstructure and processing
- ISSN: 0921-5093
- Volume/Número/Paginação/Ano: v.813, p.1-14, art. n. 141170, 2021
- Este periódico é de assinatura
- Este artigo NÃO é de acesso aberto
- Cor do Acesso Aberto: closed
-
ABNT
ALKMIN, Luciano Braga et al. Creep behavior of conventional and Nb-modified as-cast MAR-M246 superalloy. Materials science and engineering a-structural materials properties microstructure and processing, v. 813, n. art. 141170, p. 1-14, 2021Tradução . . Disponível em: https://doi.org/10.1016/j.msea.2021.141170. Acesso em: 27 dez. 2025. -
APA
Alkmin, L. B., Utada, S., Chaia, N., Reis, D. A., Coelho, G. C., Cormier, J., & Nunes, C. A. (2021). Creep behavior of conventional and Nb-modified as-cast MAR-M246 superalloy. Materials science and engineering a-structural materials properties microstructure and processing, 813( art. 141170), 1-14. doi:10.1016/j.msea.2021.141170 -
NLM
Alkmin LB, Utada S, Chaia N, Reis DA, Coelho GC, Cormier J, Nunes CA. Creep behavior of conventional and Nb-modified as-cast MAR-M246 superalloy [Internet]. Materials science and engineering a-structural materials properties microstructure and processing. 2021 ;813( art. 141170): 1-14.[citado 2025 dez. 27 ] Available from: https://doi.org/10.1016/j.msea.2021.141170 -
Vancouver
Alkmin LB, Utada S, Chaia N, Reis DA, Coelho GC, Cormier J, Nunes CA. Creep behavior of conventional and Nb-modified as-cast MAR-M246 superalloy [Internet]. Materials science and engineering a-structural materials properties microstructure and processing. 2021 ;813( art. 141170): 1-14.[citado 2025 dez. 27 ] Available from: https://doi.org/10.1016/j.msea.2021.141170 - High Temperature Oxidation Behavior of Conventional and Nb-Modified MAR-M246 Ni-Based Superalloy
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Informações sobre o DOI: 10.1016/j.msea.2021.141170 (Fonte: oaDOI API)
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