| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development VI – Closed-Loop Alloy Design
|
| Presentation Title |
Tailoring Microstructure with Precipitation to Improve the Mechanical Properties of Laser Powder Bed Fused Marageing Steel |
| Author(s) |
Hossein Eskandari Sabzi, Roger Castellote-Alvarez, Seoung-Ho Lim, Diego Della Crociata, Xinjiang Hao, David San-Martín, Marco Simonelli, Pyuck-Pa Choi, Pedro Rivera-Díaz-del-Castillo |
| On-Site Speaker (Planned) |
Pedro Rivera-Díaz-del-Castillo |
| Abstract Scope |
The primary objective in many industrial applications of additively manufactured (AMed) marageing steels has been to achieve high strength, with reasonable ductility. However, these alloys have faced challenges such as higher residual stress and the retaining of large contents of austenite and δ-ferrite due to severe heating/cooling rate and temperature gradients, which lead to manufacturing components that does not exhibit required strength in the as-built state. In order to overcome these challenges and enhance the overall mechanical properties, this research focuses on developing a novel precipitation-hardening marageing steel to tailor the microstructure during laser powder bed fusion (LPBF) process. By implementing an optimised processing parameters set, a special ultra-fine microstructure was achieved. This microstructure consisted of a martensitic matrix decorated with nanometre sized Cu-rich precipitates and Nb(C,N) in the LPBF as-built state. This tailored microstructure demonstrated a desirable combination of high yield and tensile strength, as well as ductility. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |