About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-47: Micro Selective Laser Melting of Stainless Steel Auxetic Metabiomaterials |
| Author(s) |
Giacomo Cappelli, Lidy Fratila-Apachitei, Iulian Apachitei, Amir Zadpoor |
| On-Site Speaker (Planned) |
Giacomo Cappelli |
| Abstract Scope |
Metabiomaterials are promising for bone implants due to their interconnected macroporosity, low relative density and architecture that enable tailored mechanical and biological performance. However, conventional selective laser melting (SLM) lacks the resolution required for sub-millimeter pores and produces rough surfaces due to unmelted particle spatter. This study downscaled SLM into MicroSLM process using below 20 µm size powders, a 40 µm laser spot, and 20 µm layers to fabricate 316L stainless steel metabiomaterials. MicroSLM parameters were optimized to produce 50 µm thick walls and 100 µm diameter pillars. Auxetic re-entrant honeycomb structures with 10°-20° re-entrant angles, 1 to 2.5 mm struts lengths and 200 µm average strut diameter were successfully manufactured. Compression tests with digital image correlation confirmed their auxetic behavior with Poisson’s ratios from -0.1 to -0.5 and elastic moduli from 100 to 600 MPa. MicroSLM improved accuracy and surface quality, enabling miniaturized porous architectures production for biomedical applications. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Additive Manufacturing, Biomaterials, Mechanical Properties |