About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys, Processing and Characterization
|
Presentation Title |
E-15: TEM Dislocation Interaction with the Microstructure of an Al-Si-Mg Alloy Elaborated by Laser Beam Melting |
Author(s) |
Nicolas Bello, Malo Jullien, Cassiopée Galy, Céline Larignon, Joël Douin |
On-Site Speaker (Planned) |
Nicolas Bello |
Abstract Scope |
To understand the microscale precipitation hardening in an AS7G06 alloy elaborated by laser beam melting, a comparison between T6 heat treatment and a direct artificial ageing (DAA) have been made. TEM in situ straining experiments conducted on a JEOL allow the direct observation of the dislocation movement within a microstructure. The precipitate resistance can then be calculated based on the Hazzeldine formula to obtain a value of its resistance.
Fine TEM characterizations confirmed the presence of the Si-network on the DAA microstructure and a foundry-like one for the T6 heat treatment. TEM in situ straining experiments allow the identification of the hardening precipitates. Though the dislocation interactions, their resistance has been calculated. With these values we were able to quantify hardening participation and adapt the Hirsh & Kelly formula to fit with the measured properties. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Additive Manufacturing, Characterization, Phase Transformations |