Open AccessUltrafast X‐ray imaging of laser–metal additive manufacturing processes
Author(s) -
Parab Niranjan D.,
Zhao Cang,
Cunningham Ross,
Escano Luis I.,
Fezzaa Kamel,
Everhart Wes,
Rollett Anthony D.,
Chen Lianyi,
Sun Tao
Publication year - 2018
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577518009554
Subject(s) - laser , ultrashort pulse , materials science , synchrotron , temporal resolution , frame rate , fusion , optics , nuclear engineering , physics , philosophy , linguistics , engineering
The high‐speed synchrotron X‐ray imaging technique was synchronized with a custom‐built laser‐melting setup to capture the dynamics of laser powder‐bed fusion processes in situ . Various significant phenomena, including vapor‐depression and melt‐pool dynamics and powder‐spatter ejection, were captured with high spatial and temporal resolution. Imaging frame rates of up to 10 MHz were used to capture the rapid changes in these highly dynamic phenomena. At the same time, relatively slow frame rates were employed to capture large‐scale changes during the process. This experimental platform will be vital in the further understanding of laser additive manufacturing processes and will be particularly helpful in guiding efforts to reduce or eliminate microstructural defects in additively manufactured parts.