User profiles for Kamel Fezzaa
Kamel Fezzaa _ كمال فزّاعPhysicist, Advanced Photon Source, Argonne National Laboratory Verified email at anl.gov Cited by 11531 |
Ultrafast x-ray phase-contrast imaging of the initial coalescence phase of two water droplets
We report an ultrafast x-ray phase-contrast imaging study of the early merging dynamics of
two water drops in air. Owing to the edge-enhancement capability, the high penetrability, and …
two water drops in air. Owing to the edge-enhancement capability, the high penetrability, and …
Tracheal respiration in insects visualized with synchrotron X-ray imaging
Insects are known to exchange respiratory gases in their system of tracheal tubes by using
either diffusion or changes in internal pressure that are produced through body motion or …
either diffusion or changes in internal pressure that are produced through body motion or …
Transient dynamics of powder spattering in laser powder bed fusion additive manufacturing process revealed by in-situ high-speed high-energy x-ray imaging
Powder spattering is a major cause of defect formation and quality uncertainty in the laser
powder bed fusion (LPBF) additive manufacturing (AM) process. It is very difficult to investigate …
powder bed fusion (LPBF) additive manufacturing (AM) process. It is very difficult to investigate …
[HTML][HTML] Real-time monitoring of laser powder bed fusion process using high-speed X-ray imaging and diffraction
We employ the high-speed synchrotron hard X-ray imaging and diffraction techniques to
monitor the laser powder bed fusion (LPBF) process of Ti-6Al-4V in situ and in real time. We …
monitor the laser powder bed fusion (LPBF) process of Ti-6Al-4V in situ and in real time. We …
[HTML][HTML] Ultrafast X-ray study of dense-liquid-jet flow dynamics using structure-tracking velocimetry
High-speed liquid jets and sprays are complex multiphase flow phenomena with many
important industrial applications 1 , 2 . Great efforts have been devoted to understand their …
important industrial applications 1 , 2 . Great efforts have been devoted to understand their …
Keyhole threshold and morphology in laser melting revealed by ultrahigh-speed x-ray imaging
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 …
depressions (also known as keyholes) during laser melting of metals as practiced in additive …
Critical instability at moving keyhole tip generates porosity in laser melting
Laser powder bed fusion is a dominant metal 3D printing technology. However, porosity
defects remain a challenge for fatigue-sensitive applications. Some porosity is associated with …
defects remain a challenge for fatigue-sensitive applications. Some porosity is associated with …
[HTML][HTML] Keyhole fluctuation and pore formation mechanisms during laser powder bed fusion additive manufacturing
Keyhole porosity is a key concern in laser powder-bed fusion (LPBF), potentially impacting
component fatigue life. However, some keyhole porosity formation mechanisms, eg, keyhole …
component fatigue life. However, some keyhole porosity formation mechanisms, eg, keyhole …
[HTML][HTML] Pore elimination mechanisms during 3D printing of metals
Laser powder bed fusion (LPBF) is a 3D printing technology that can print metal parts with
complex geometries without the design constraints of traditional manufacturing routes. …
complex geometries without the design constraints of traditional manufacturing routes. …
Direct observation of pore formation mechanisms during LPBF additive manufacturing process and high energy density laser welding
Laser powder bed fusion (LPBF) is a 3D printing technology that can print parts with complex
geometries that are unachievable by conventional manufacturing technologies. However, …
geometries that are unachievable by conventional manufacturing technologies. However, …