Abstract
To understand the efficiency of gating systems, four systems, namely AFS styled pressurized system, AFS styled non-pressurized system, naturally pressurized system with a side riser and a naturally pressurized system with a top riser, were studied. The naturally pressurized systems were provided with overflows which collected the incoming metal swirl while the pressurized and non-pressurized systems had runner wells. Parameters like velocity of metal flow, air entrapment, microporosity and Niyama criterion were considered, and a design was developed with a common pouring basin using solidification software. Two molds were 3D printed using carbonitride sand, and steel of composition Fe-29Mn-8.2Al-0.91C-0.88Si-0.49Mo was poured into both the molds. Optical microscopy revealed extensive oxide-film-like features on samples obtained from the top section of castings. Across the limited number of molds and a single heat, the pressurized and non-pressurized systems had Charpy toughness values comparable to the naturally pressurized top riser system. The observed fracture surfaces commonly contained Al-oxide-rich film features and presence of AlN, AlN-MnO and AlN-MnS inclusions.
Recommended Citation
K. Balasubramanian et al., "Comparative Evaluation of Gating Systems in FeMnAl Castings," International Journal of Metalcasting, Springer, Jan 2026.
The definitive version is available at https://doi.org/10.1007/s40962-026-01980-w
Department(s)
Materials Science and Engineering
Publication Status
Open Access
Keywords and Phrases
air entrapment; nonmetallic inclusions; oxide-rich bifilms; simulation; vortex gate
International Standard Serial Number (ISSN)
2163-3193; 1939-5981
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2026 Springer, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
01 Jan 2026
