Microstructural and Mechanical Characterization of Directionally Solidified Conventional and Nb-Modified Mar-M247 Superalloy (2019)
- Authors:
- Autor USP: NUNES, CARLOS ANGELO - EEL
- Unidade: EEL
- DOI: 10.1007/s11665-019-04014-1
- Assunto: TERMODINÂMICA
- Keywords: Mar-M247 superalloy; Nb-modified Mar-M247; thermodynamic simulation
- Agências de fomento:
- Language: Inglês
- Abstract: This study analyzes the effects of replacing Ta by Nb (at.% basis) in the phase transformation temperatures, Scheil solidification behavior, and microstructural mechanical features of a Nb-modified as well as conventional Mar-M247 superalloys. Both alloys were directionally solidified at a withdrawal rate of 18 cm/h under a thermal gradient of about 80 °C/cm. DSC results were compared to thermodynamic simulations of phase transformation temperatures and showed a good correlation. The replacement of Ta by Nb has not altered the solidification path of Mar-M247, keeping the sequence L → L + γ → L + γ + MC → L + γ + MC + γ/γ′ eutectic. Due to the segregation of Hf and Zr to the very last liquid to solidify, a low melting point γ/Ni5(Hf,Zr) constituent was observed. The as-solidified microstructures of both Mar-M247(Nb) and Mar-M247 were constituted of columnar dendrites of gamma matrix (γ) phase with cuboidal gamma-prime (γ′) precipitates. In addition, γ/γ′-eutectic was observed in the interdendritic region along with MC carbides in blocky, script (blocky dendritic), needle-like and fine nodular morphologies. Both alloys contained about 1.5 vol.% of MC carbides. The MC carbides in Mar-M247(Nb) and Mar-M247 are, respectively, Nb-rich and Ta-rich, with only a limited amount of Hf being detected in the MC phase. The yield stress of Nb-modified Mar-M247 showed higher values up to 750 °C. For higher temperatures, above 800 °C, a conventional Mar-M247 presented a higher value of yield stress.
- Imprenta:
- Source:
- Título: Journal of materials engineering and performance
- ISSN: 10599495
- Volume/Número/Paginação/Ano: v.28, p. 2427–2438, 2019
- Status:
- Artigo possui versão em acesso aberto em repositório (Green Open Access)
- Versão do Documento:
- Versão publicada (Published version)
- Acessar versão aberta:
-
ABNT
COSTA, A. M. S. et al. Microstructural and Mechanical Characterization of Directionally Solidified Conventional and Nb-Modified Mar-M247 Superalloy. Journal of materials engineering and performance, v. 28, p. 2427–2438, 2019Tradução . . Disponível em: https://doi.org/10.1007/s11665-019-04014-1. Acesso em: 31 mar. 2026. -
APA
Costa, A. M. S., Lopes, E. S. N., Contieri, R. J., Caram, R., Baldan, R., Fuchs, G. E., & Nunes, C. A. (2019). Microstructural and Mechanical Characterization of Directionally Solidified Conventional and Nb-Modified Mar-M247 Superalloy. Journal of materials engineering and performance, 28, 2427–2438. doi:10.1007/s11665-019-04014-1 -
NLM
Costa AMS, Lopes ESN, Contieri RJ, Caram R, Baldan R, Fuchs GE, Nunes CA. Microstructural and Mechanical Characterization of Directionally Solidified Conventional and Nb-Modified Mar-M247 Superalloy [Internet]. Journal of materials engineering and performance. 2019 ;28 2427–2438.[citado 2026 mar. 31 ] Available from: https://doi.org/10.1007/s11665-019-04014-1 -
Vancouver
Costa AMS, Lopes ESN, Contieri RJ, Caram R, Baldan R, Fuchs GE, Nunes CA. Microstructural and Mechanical Characterization of Directionally Solidified Conventional and Nb-Modified Mar-M247 Superalloy [Internet]. Journal of materials engineering and performance. 2019 ;28 2427–2438.[citado 2026 mar. 31 ] Available from: https://doi.org/10.1007/s11665-019-04014-1 - Corrosion resistance of aged Ti–Mo–Nb alloys for biomedical applications
- Microstructure and corrosion behavior in SBF medium of spark plasma sintered Ti-xZr-20Si-10B (x = 5, 7, 10, 15, 20-at.-%) alloys
- Spark Plasma Sintering of Ti6Si2B-based Ti-Si-B Alloys and Their Corrosion Resistance in Artificial Saliva and SBF Media
- Creep Properties of Directionally Solidified Nb-Modified Ni-Base Superalloy, Mar-M247
- Mechanical and Microstructural Characterization of AS-CAST Ti-12Mo-xNb Alloys for Orthopedic Application
- Effect of zirconium addition on the phase transformations in as-cast and heat-treated Ti–Zr–Si–B alloys
- Effect of hot swaging on microstructure and properties of aged Ti-10Mo-20Nb alloy
- Characterization of Impact Toughness Properties of DIN39MnCrB6-2 Steel Grade
- Microstructure and Mechanical Properties of Ti-12Mo-8Nb Alloy Hot Swaged and Treated for Orthopedic Applications
- The 1300 °C Isothermal Section in the Al2O3-Y2O3-Nb2O5 System
Informações sobre a disponibilidade de versões do artigo em acesso aberto coletadas automaticamente via oaDOI API (Unpaywall).
Por se tratar de integração com serviço externo, podem existir diferentes versões do trabalho (como preprints ou postprints), que podem diferir da versão publicada.
How to cite
A citação é gerada automaticamente e pode não estar totalmente de acordo com as normas
