|About this Abstract
||MS&T23: Materials Science & Technology
||Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
||An Efficiency Study of Multi-Mode Laser Profiles
||Austin Tiley, Ersilia Cozzolino, Edward D. Herderick, Antonio Ramirez
|On-Site Speaker (Planned)
Laser powder bed fusion (L-PBF) is an attractive additive manufacturing (AM) process for developing near-net shape parts to minimize post-processing costs. This can be applied for high-temperature alloys such as nickel superalloy 718 that is commonly used in aerospace applications. L-PBF build rates are typically 5-10 cubic centimeters per hour, which are not economical for the majority of the manufacturing industry. To better understand the constraints of these speeds, the CDME team evaluated two different laser beam geometries (traditional Gaussian and Ring) using an nLight multi-modal laser, with the end goal of being able to improve build rates by 10x and maintain energy consumption of the system. Outcomes from this study include: quantifying the energy consumption of a L-PBF system including laser usage, microstructure differences due to different solidification modes, and resulting mechanical properties. The culmination of these results were used to develop a direct comparison of part to part.