Keyhole threshold and morphology in laser melting revealed by ultrahigh-speed x-ray imaging

Science56.90
Volume: 363, Issue: 6429, Pages: 849 - 852
Published: Feb 22, 2019
Abstract
We used ultrahigh-speed synchrotron x-ray imaging to quantify the phenomenon of vapor depressions (also known as keyholes) during laser melting of metals as practiced in additive manufacturing. Although expected from welding and inferred from postmortem cross sections of fusion zones, the direct visualization of the keyhole morphology and dynamics with high-energy x-rays shows that (i) keyholes are present across the range of power and scanning...
Paper Details
Title
Keyhole threshold and morphology in laser melting revealed by ultrahigh-speed x-ray imaging
Published Date
Feb 22, 2019
Journal
Volume
363
Issue
6429
Pages
849 - 852
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