Recent advances on in situ materials characterization using ultra high-speed x-ray imaging at The European Synchrotron – ESRF

2019 ◽  
Author(s):  
Margie P. Olbinado ◽  
Alexander Rack
Keyword(s):  
High Speed ◽  
Materials Characterization ◽  
X Ray ◽  
Recent Advances ◽  
Ultra High Speed ◽  
X Ray Imaging

scholarly journals In Situ Analysis of Laser Powder Bed Fusion Using Simultaneous High-Speed Infrared and X-ray Imaging

JOM ◽  
2020 ◽  
Vol 73 (1) ◽  
pp. 201-211 ◽  
Author(s):  
Benjamin Gould ◽  
Sarah Wolff ◽  
Niranjan Parab ◽  
Cang Zhao ◽  
Maria Cinta Lorenzo-Martin ◽  
...  
Keyword(s):  
High Speed ◽  
In Situ Analysis ◽  
Powder Bed Fusion ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
X Ray ◽  
X Ray Imaging

High-Speed X-Ray Imaging of Diesel Injector Needle Motion

2009 ◽  
Author(s):  
A. L. Kastengren ◽  
C. F. Powell ◽  
Z. Liu ◽  
K. Fezzaa ◽  
J. Wang
Keyword(s):  
High Speed ◽  
Three Dimensional ◽  
Linear Increase ◽  
Nozzle Geometry ◽  
X Ray ◽  
Needle Position ◽  
X Ray Imaging ◽  
Linear Oscillation ◽  
Degree Of Convergence

Phase-enhanced x-ray imaging has been used to examine the geometry and dynamics of four diesel injector nozzles. The technique uses a high-speed camera, which allows the dynamics of individual injection events to be observed in real time and compared. Moreover, data has been obtained for the nozzles from two different viewing angles, allowing for the full three-dimensional motions of the needle to be examined. This technique allows the needle motion to be determined in situ at the needle seat and requires no modifications to the injector hardware, unlike conventional techniques. Measurements of the nozzle geometry have allowed the average nozzle diameter, degree of convergence or divergence, and the degree of rounding at the nozzle inlet to be examined. Measurements of the needle lift have shown that the lift behavior of all four nozzles consists of a linear increase in needle lift with respect to time until the needle reaches full lift and a linear decrease as the needle closes. For all four nozzles, the needle position oscillates at full lift with a period of 170–180 μs. The full-lift position of the needle changes as the rail pressure increases, perhaps reflecting compression of the injector components. Significant lateral motions were seen in the two single-hole nozzles, with the needle motion perpendicular to the injector axis resembling a circular motion for one nozzle and linear oscillation for the other nozzle. The two VCO multihole nozzles show much less lateral motion, with no strong oscillations visible.

scholarly journals Ultra-high-speed x-ray imaging of shock-induced cavity collapse in a solid medium

2020 ◽  
Author(s):  
Emilio M. Escauriza ◽  
Joao P. Duarte ◽  
David J. Chapman ◽  
Lukasz Farbaniec ◽  
John C. Jonsson ◽  
...  
Keyword(s):  
High Speed ◽  
Solid Medium ◽  
X Ray ◽  
Cavity Collapse ◽  
Ultra High Speed ◽  
X Ray Imaging

scholarly journals Ultra-high speed X-ray imaging of dynamic fracturing in cementitious materials under impact

2021 ◽  
Vol 250 ◽  
pp. 01014
Author(s):  
Bratislav Lukić ◽  
Maria Blasone ◽  
Yannick Duplan ◽  
Pascal Forquin ◽  
Emilio Escauriza ◽  
...  
Keyword(s):  
High Speed ◽  
High Strength ◽  
Cementitious Materials ◽  
Test Configuration ◽  
X Ray ◽  
Ultra High Speed ◽  
X Ray Imaging ◽  
Two Samples ◽  
Fragmentation Patterns ◽  
Dynamic Fracturing

In this work the dynamic fracturing of an ultra-high strength cementitious material is probed with in-situ ultra-high speed X-ray phase-contrast diagnostics to investigate the phenomenology of dynamic fracture. Gas gun experiments were conducted on two characteristic samples with two different impact speeds, namely 80 and 190 m/s using the edge-on impact test configuration. The samples were placed within the intense X-ray beam providing an observation field of 12.8 mm in width and 8 mm in height. Thanks to equispaced 16 bunches of short X-ray pulses, the samples were imaged through an indirect detector arrangement using the Shimadzu HPV-X2 camera lens-coupled to a fast scintillator capturing through-thickness measurements with an interframe time of 1.06 µs. The comparison of fragmentation patterns between two samples revealed an important insight into velocity dependant spall formation as well as the effects of crack closure and bridging.

scholarly journals Ultra-high-speed indirect x-ray imaging system with versatile spatiotemporal sampling capabilities

2018 ◽  
Vol 57 (18) ◽  
pp. 5004 ◽  
Author(s):  
Emilio M. Escauriza ◽  
Margie P. Olbinado ◽  
Michael E. Rutherford ◽  
David J. Chapman ◽  
John C. Z. Jonsson ◽  
...  
Keyword(s):  
High Speed ◽  
Imaging System ◽  
X Ray ◽  
Ultra High Speed ◽  
X Ray Imaging

High Speed Imaging Study of the Dynamics of Ultrasonic Bubbles at a Liquid-Solid Interface

2013 ◽  
Vol 765 ◽  
pp. 230-234 ◽  
Author(s):  
Dong Yue Tan ◽  
Jia Wei Mi
Keyword(s):  
High Speed ◽  
Primary Dendrite ◽  
Imaging Study ◽  
High Speed Imaging ◽  
X Ray ◽  
Dendrite Fragmentation ◽  
X Ray Imaging ◽  
Wave Induced ◽  
Photon Source

High speed imaging, including the ultrafast synchrotron X-ray imaging facility at the beamline 32-ID-B of the Advanced Photon Source (APS), was used to study in-situ (1) the dynamics of ultrasonic bubbles inside a water suspension with an acoustic field of varied pressure; and (2) the interaction of a pulsing bubble at a primary dendrite arm tip inside a succinonitrile-1wt% camphor organic transparent alloy. A simple finite element based model was developed to simulate the stress distribution inside the dendrite due to the pulsing of the ultrasonic bubble, providing more evidence for understanding quantitatively the ultrasonic wave induced dendrite fragmentation phenomenon.

scholarly journals High Speed In-situ X-ray Imaging of 3D Freeze Printing of Aerogels

2020 ◽  
Vol 36 ◽  
pp. 101513
Author(s):  
Halil Tetik ◽  
Guang Yang ◽  
Wenda Tan ◽  
Anthony Fong ◽  
Shuting Lei ◽  
...  
Keyword(s):  
High Speed ◽  
X Ray ◽  
X Ray Imaging
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