| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
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| Presentation Title |
Investigating the Impact of Part Dimensions on Microstructural Integrity and Mechanical Performances in Optimized L-PBF Process |
| Author(s) |
Soung Yeoul Ahn, Sang Guk Jeong, Man Jae SaGong, Gitaek Lee, Eun Seong Kim, Hyojin Park, Jung-Wook Cho, Jung Gi Kim, Hyoung Seop Kim |
| On-Site Speaker (Planned) |
Soung Yeoul Ahn |
| Abstract Scope |
Optimizing process parameter in laser-based metal additive manufacturing (MAM) necessitates a thorough examination of variations across the process window. This study challenges the prevalent use of small coupons for parameters optimization. It was found that Fe-Ni parts exhibit significant differences in defect, microstructure and mechanical properties based on their size. Larger parts tend to develop more lack-of-fusion defects and cracks. Which result in reduced density and limited grain growth. These issues are attributed to variations in thermal history related to part size. Finite element analyses indicated that increasing scan length prolongs the period of the thermal cycle, resulting in considerable cooling. The influence of scan area on cooling sequences highlights critical considerations for future researchers optimizing processes for novel alloy systems using laser-based MAM. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Process Technology, Computational Materials Science & Engineering |