|About this Abstract
||Materials Science & Technology 2020
||Phase Transformations in Additively Manufactured Materials
||Laser Powder Bed Fusion of Grade 300 Maraging Steel for Tooling Applications
||Peeyush Nandwana, Rangasayee Kannan, Andrew Nguyen, Donovan Leonard, Ryan Dehoff
|On-Site Speaker (Planned)
Maraging steels, owing to the presence of the softer martensite, high dimensional stability, and the ability to be precipitation hardened to high strengths make for excellent tooling materials via laser powder bed fusion (LPBF) for injection molding applications. The softer nickel enriched martensite prevents solid-state cracking resulting from the high cooling rates experienced during LPBF. In this study we discuss the as-fabricated microstructure of a Ti-free Grade 300 maraging steel and demonstrate that direct aging results in higher strength and higher elongation compared to the conventional solution treatment and aging. The underlying phase transformations will be discussed.