| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
Selective Laser Melting Fabrication of Ultra-high Strength Martensitic Steel |
| Author(s) |
Raiyan Seede, David Shoukr, Bing Zhang, Austin Whitt, Sean Gibbons, Philip Flater, Alaa Elwany, Raymundo Arroyave, Ibrahim Karaman |
| On-Site Speaker (Planned) |
Raiyan Seede |
| Abstract Scope |
Ultra-high strength steels (UHSSs) have attracted increasing interest for their use in the automotive and aerospace industries and in defense applications due to their high yield strengths and reasonable ductility. The Air Force Research Laboratory recently developed a relatively inexpensive UHSS called AF9628. This martensitic steel can exhibit strengths greater than 2 GPa with more than 10% elongation with proper microstructural refinement, in particular via refinement in prior austenite grain size. In an effort to produce high strength parts with a high degree of control over geometry, this work studies the effect of selective laser melting (SLM) process parameters on the mechanical properties of AF9628. Fully dense samples were achieved over a range of process parameters. Ultimate tensile strengths of up to 1.43 GPa and elongations of up to 12.3% were observed in as-printed specimens. Variation in process parameters did not significantly affect the mechanical response under compression. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |