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Meeting

2026 TMS Annual Meeting & Exhibition

Symposium

Late News Poster Session

Presentation Title

F-81: Process–Structure–Property Correlations in Al–4.5Cu–0.4Sc Alloy Lattice by Hybrid Investment Casting

Author(s)

Yifan Li, Jose Marcelino Marcelino Da Silva Dias Filho, Yun-Fei Fu, Sajid Ullah Butt, Ahmed Jawad Qureshi, Hani Henein

On-Site Speaker (Planned)

Jose Marcelino Marcelino Da Silva Dias Filho

Abstract Scope

This study examines the microstructure–mechanical property relationships of Al–4.5 wt.% Cu–0.4 wt.% Sc lattice structures fabricated using a Hybrid Investment Casting process enabled by additively manufactured sacrificial patterns. Finite Element Analysis (FEA) was used to predict stress distribution and compressive behavior, with experimental testing validating the model’s accuracy. Post-processing heat treatments significantly enhanced yield and ultimate strengths through controlled precipitation. Scanning Electron Microscopy (SEM) and Energy-Dispersive X-ray Spectroscopy (EDS) revealed correlations between precipitate evolution (Al₂Cu and Al₃Sc phases), elastic modulus, and strength. The results demonstrate a viable pathway for producing lightweight, high-strength aluminum alloy lattice structures and provide insight into process–structure–property relationships relevant to additive manufacturing of advanced alloy systems.

Proceedings Inclusion?

Undecided

Keywords

Additive Manufacturing,

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