|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
||Laser scan length: a new parameter to tune the thermal buildup in laser powder bed fusion processes
||Qingyang Lu, Xiaogang Wang, Tan-Phuc Le, Jude Emil Pascua Fronda, Matteo Seita
|On-Site Speaker (Planned)
Different microstructures can be incorporated in a single part by tuning the process parameters during laser powder bed fusion (LPBF). Here, we investigate the effect of the laser scan length on the grain structure and orientation distribution in 316L stainless steel. We vary the scan length from 2 mm to 40 mm and find markedly different microstructures. We ascribe these results to the change in cooling rate the material experiences during LPBF, which we can tailor by introducing a delay at the end of each line scan. Using this strategy, we produce parts with different microstructure and mechanical properties regardless of their geometry or scanning strategy. Our proposed printing strategy enables the spatial control of texture-dependent properties of parts printed with small scan lengths.
||Additive Manufacturing, Mechanical Properties,