About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Presentation Title |
Phase-field Simulations of Solute Element Segregations at Various Interfaces in Additively Manufactured IN718 Ni-based Superalloy |
Author(s) |
Masayuki Okugawa, Katsuhiko Sawaizumi, Yuichiro Koizumi, Takayoshi Nakano |
On-Site Speaker (Planned) |
Masayuki Okugawa |
Abstract Scope |
Solute segregation significantly affects material properties and is a critical issue in the laser powder bed fusion (L-PBF) additive manufacturing (AM) of Ni-based superalloys. Therefore, understanding solute segregation is essential for fabricating reliable parts avoiding cracks. In the L-PBFed parts, there are various interfaces, such as interdendritic boundaries, melt pool boundaries, and impinging interfaces at the central part of the melt pool. Segregation behavior and crack susceptibilities are suggested to differ in these interface regions. In the present study, we investigated the solute element segregation behavior at the various interfaces under rapid cooling conditions by the multiphase-field method. We found that significant solute segregations occur at the interfaces, and the solute segregation behavior of solute elements largely depends on the regions of the melt pool. Moreover, the sensitivities of the various interfaces to liquation and solidification cracks also differ, reflecting the solute segregation behavior. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |