Quantifying Additive Manufacturing Vapor Plumes Using Laser-Induced Breakdown Spectroscopy, Synchrotron X-Ray Radiography and Simulations.

ABSTRACT: Understanding vaporization phenomena in laser powder bed fusion (LPBF) additive manufacturing has proven challenging; the links between laser-induced metal vaporization, rate of elemental loss, and composition irregularities remain unclear. Here, the vapor plume composition and preferential vaporization effect is quantified during LPBF, using in situ 1 kHz laser-induced breakdown spectroscopy with correlative X-ray synchrotron radiography, multi-physics simulations, and energy dispersive X-ray spectroscopy. It is demonstrated that vaporization increases under keyhole mode, and preferential vaporization causes elemental loss rates of Ni ≈ Fe > Cr > Mo in a Ni-based superalloy, IN625. It is found that the melt pool temperature (T ≈2300 K) can be approximated by cross-referencing vapor pressu

SUBMITTER: Getley ACM 

PROVIDER: S-EPMC12948290 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature