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X-ray movies show laser spattering

Researchers from Missouri S&T, Argonne National Laboratory and the University of Utah, Salt Lake City, created high-speed X-ray movies of laser spattering. Using X-ray imaging, the researchers captured the spattering behavior of titanium alloy Ti-6Al-4V during fabrication. The microscopic movies reveal a novel mechanism of laser spattering – the bulk explosion of a tongue-like protrusion that forms in one region of the metal. According to Dr. Lianyi Chen, assistant professor of mechanical and aerospace engineering at Missouri S&T, “The newly discovered mechanism will guide the development of approaches to mitigate defect formation in welds and additively manufactured parts.”