| About this Abstract |
| Meeting |
TMS Specialty Congress 2024
|
| Symposium
|
Symposium on Digital & Robotic Forming 2024
|
| Presentation Title |
Modifying AM Microstructure and Process Defects by Post-process Forging |
| Author(s) |
Austin Q. Ngo, Noah Kohlhorst, Svitlana Fialkova, Glenn Daehn, Bradley Jared, Jian Cao, John J Lewandowski |
| On-Site Speaker (Planned) |
John J Lewandowski |
| Abstract Scope |
Additive Manufacturing (AM) processes have versatile capabilities but are susceptible to the formation of as-cast non-equilibrium microstructures, process-induced defects, and porosity, which have deleterious effects on the mechanical performance. Isothermal forging was investigated as a novel post-processing technique for refining microstructure, reducing process defect severity, and thereby improving mechanical properties. Specimens of Laser Powderbed Fusion (LPBF) AlSi10Mg were fabricated over a range of process parameters and tensile tested, in addition to examining the effects of isothermal forging at different temperatures and strain rates on the as-deposited materials. The microstructures, process defect populations, and tensile properties of both as-deposited and forged materials were quantified and analyzed by OM, EBSD, CT, and SEM. The effects of deposition conditions and forge post-processing on LPBF AlSi10Mg will be discussed in terms of microstructure, mechanical properties, and fractography. |
| Proceedings Inclusion? |
Definite: Other |