Work

Austenite phase evolution in duplex stainless steels printed using laser directed energy deposition

Year: 2026

Type: article

Abstract: Direct energy deposition–laser beam (DED-LB) was performed using duplex stainless steel (DSS) 2507 powders. Single and multilayer samples were printed to determine how reheating from additional layers affects austenite formation. Unlike laser powder bed fusion (PBF-LB) of DSS producing negligible austenite, DED-LB-printed DSS exhibited ~ 20% austenite in the single layer that increased to ~ 25% after printing subsequent layers. Transient-thermal numerical simulations and thermodynamic calculations were performed to predict phase formation. The calculations suggest that the increased austenite is due to solid-state (ferrite to austenite) phase formation after solidification and subsequent reheating followed by relatively slower cooling rates. Graphical abstract

Source: MRS Communications

DOI: 10.1557/s43579-026-00962-7

Authors: Mustafa Tobah, Rohan Somashekara, Amit Misra

Institution: University of Michigan

Language: English

Topic: Additive Manufacturing Materials and Processes

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,390

Funder: Michigan Center for Materials Characterization, University of Michigan