|About this Abstract
||MS&T23: Materials Science & Technology
||Phase Transformations and Microstructure Evolution during Post-Processing of Additively Manufactured Metals
||Influence of Post-process Forging on Microstructure and Properties of LPBF AlSi10Mg
||Austin Q. Ngo, Svitlana Fialkova, Noah Kohlhorst, Glenn Daehn, John J. Lewandowski
|On-Site Speaker (Planned)
||Austin Q. Ngo
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 and tensile properties of both as-deposited and forged materials were quantified and analyzed by OM, EBSD, 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.