About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Functionally Graded Wear-Resistant Lightweight Steel Manufactured by Laser Powder Bed Fusion Deposition |
| Author(s) |
Jin-su Park, Joonoh Moon, Hansol Kwon, Seong-Jun Park |
| On-Site Speaker (Planned) |
Jin-su Park |
| Abstract Scope |
Fe-Mn-Al-C lightweight steels have received great attention owing to their excellent mechanical properties and low density. In particular, austenite-base lightweight steels, achieved by adding high amounts of Al and C, exhibit an excellent balance of high strength and elongation. However, further increase in strength caused by adding more Al and C results from the formation of coarse intergranular kappa-carbide and Fe3Al-DO3 phase, making the microstructure inhomogeneous and thus deteriorating wear resistance. To overcome this limitation, we deposited wear-resistant steel SKD61 powder on the surface of the lightweight steel through laser powder bed fusion(L-PBF). After the PBF, the heat treatment of quenching and tempering was performed to make a wear-resistant surface. The microstructure of all samples were analyzed, and the mechanical properties were tested. In addition, the wear resistance of the SKD61 surface was evaluated by wear tests. Finally, the relationship between microstructure, mechanical properties, and wear resistance was discussed. |