About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys, Characterization and Processing
|
Presentation Title |
E-33: Laser Powder-Bed Fusion AA 7075 Aluminium Alloy Synthesis and Characterization |
Author(s) |
Irena Paulin, Crtomir Donik, Nejc Velikajne , Matjaž Godec |
On-Site Speaker (Planned) |
Irena Paulin |
Abstract Scope |
Conventionally processed, high-strength aluminium alloys from the AA2xxx, AA6xxx and AA7xxx series are widely used for aerospace applications. With the emergence of SLM technology, they are confronted with a number of difficulties due to the phenomenon of solidification-cracking susceptibility. This solidification cracking is related to the alloy’s characteristics, such as a large solidification range, the solidification shrinkage, and poor fluidity of the molten phase. It occurs during the melt-pool solidification when the thin liquid film cannot accommodate the solidification shrinkage. An additional challenging issue is the evaporation of the volatile alloying elements (Zn, Mg, Mn, Li) during the SLM process. This causes a modification of the composition, which could lead to an increase in the cracking susceptibility as well as changing the microstructure and the properties.
In our study, we manage to LPBF produced the AA7075 aluminium alloy with low porosity and promising mechanical properties. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Additive Manufacturing, Aluminum, Characterization |