Idioma:

High Temperature Fatigue Performance of Electron Beam Powder Bed Fusion Manufactured Alloy 718

Kjellsson, Henrik ; Balachandramurthi, Arun Ramanathan ; Moverare, Johan ; Hansson, Thomas

Metallurgical and materials transactions. A, Physical metallurgy and materials science, 2022, Vol.53 (7), p.2496-2514 [Periódico revisado por pares]

New York: Springer US

Texto completo disponível

Citações Citado por

Enviar para

Título:
High Temperature Fatigue Performance of Electron Beam Powder Bed Fusion Manufactured Alloy 718
Autor: Kjellsson, Henrik ; Balachandramurthi, Arun Ramanathan ; Moverare, Johan ; Hansson, Thomas
Assuntos: Additive manufacturing ; Ambient temperature ; Amplitudes ; Characterization and Evaluation of Materials ; Chemical precipitation ; Chemistry and Materials Science ; Crack initiation ; Crack propagation ; Electron beams ; Engineering ; Failure modes ; Fatigue life ; Fatigue tests ; Heat ; High temperature ; Materials Science ; Mechanical properties ; Metallic Materials ; Microstructure ; Morphology ; Nanotechnology ; Nickel base alloys ; Original Research Article ; Powder beds ; Precipitates ; Production Technology ; Produktionsteknik ; Solution heat treatment ; Structural Materials ; Superalloys ; Surfaces and Interfaces ; Thermal fatigue ; Thin Films
É parte de: Metallurgical and materials transactions. A, Physical metallurgy and materials science, 2022, Vol.53 (7), p.2496-2514
Descrição: The microstructure and mechanical properties of additively manufactured (AM) parts have been shown to be different from that of cast and wrought counterparts. In this study, electron beam powder bed fusion (EB-PBF) fabricated Alloy 718 was exposed to three different heat treatment routes followed by strain-controlled fatigue testing at 550 °C. The fatigue tests were performed with specimens built with their center axis parallel and transverse relative to the build direction. The microstructure showed saturated precipitation of δ -Ni 3 Nb after repeated solution treatment at 954 °C. In contrast, no δ -Ni 3 Nb precipitates could be observed after a single-step solution treatment at 1025 °C. However, the disparity of secondary phases showed no noticeable influence on the fatigue life. A significant difference in fatigue behavior was noted between the parallel and transverse directions. The specimens loaded parallel to the elongated grains showed on average ~5× greater life in comparison to the perpendicularly loaded specimens. Compared to corresponding heat-treated material conditions tested at ambient temperature, the specimens showed lower life at high strain amplitude and superior life at low strain amplitude. Moreover, competitive internal and surface failure modes were observed at the lower strain amplitudes while for the higher strain ranges, surface failure modes dominated.
Editor: New York: Springer US
Idioma: Inglês

Links

Voltar para lista de resultados

Anterior Resultado 8 Avançar Ir para próxima página

Realização: Logos de Redes Sociais:

High Temperature Fatigue Performance of Electron Beam Powder Bed Fusion Manufactured Alloy 718

Kjellsson, Henrik ; Balachandramurthi, Arun Ramanathan ; Moverare, Johan ; Hansson, Thomas

New York: Springer US

Buscando em bases de dados remotas. Favor aguardar.