About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Additive Manufacturing: Advanced Characterization With Synchrotron, Neutron, and In Situ Laboratory-scale Techniques IV
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| Presentation Title |
Understanding ductility-controlling strain-hardening mechanisms in an additively manufactured Al-7Si-0.3Mg-0.5Cu-1Fe alloy using in-situ synchrotron tensile testing |
| Author(s) |
Rakesh R. Kamath, Alisha Bhatt, Andrew Chuang, Jovid Rakhmonov, Dileep Singh |
| On-Site Speaker (Planned) |
Rakesh R. Kamath |
| Abstract Scope |
Due to the high cooling rates and metastable microstructures accessible, additive manufacturing (AM) is a promising alternative to produce secondary aluminum (Al) components while circumventing issues caused by impurity elements such as lower ductility due to brittle intermetallics. As a precursor to this study, AM and post-build heat treatments on a high-iron Al-Si alloy (with a composition close to post-consumer scrap) resulted in an excellent strength-ductility combination – mostly achieved by introduction of aging-induced shearable nanoprecipitates and control of the Fe-rich intermetallic characteristics. In the current study, high-energy synchrotron x-ray diffraction along with in-situ tensile testing was utilized to understand the fundamental mechanisms that govern the strain hardening response in these novel microstructures. While the diffraction peak positions were used to calculate the stress partitioning between the Al matrix and secondary phases, the peak width was used to understand the evolution of dislocation density as a function of imparted strain. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Additive Manufacturing, Recycling and Secondary Recovery |