Simultaneous high-speed ultrasound and synchrotron x-ray imaging for monitoring melt pool dynamics in metallic additive manufacturing

2020 ◽  
Vol 148 (4) ◽  
pp. 2648-2648
Author(s):  
Jared Gillespie ◽  
Wei Yi Yeoh ◽  
Bo Lan ◽  
Tao Sun ◽  
Christopher M. Kube
Keyword(s):  
Additive Manufacturing ◽  
High Speed ◽  
X Ray ◽  
Melt Pool ◽  
X Ray Imaging ◽  
Metallic Additive

scholarly journals Ultrafast X-ray imaging of laser–metal additive manufacturing processes

2018 ◽  
Vol 25 (5) ◽  
pp. 1467-1477 ◽  
Author(s):  
Niranjan D. Parab ◽  
Cang Zhao ◽  
Ross Cunningham ◽  
Luis I. Escano ◽  
Kamel Fezzaa ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
High Speed ◽  
Large Scale ◽  
Manufacturing Processes ◽  
Powder Bed ◽  
X Ray ◽  
Melt Pool ◽  
X Ray Imaging ◽  
Resolution Imaging

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.

scholarly journals Revealing particle-scale powder spreading dynamics in powder-bed-based additive manufacturing process by high-speed x-ray imaging

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Luis I. Escano ◽  
Niranjan D. Parab ◽  
Lianghua Xiong ◽  
Qilin Guo ◽  
Cang Zhao ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Manufacturing Process ◽  
High Speed ◽  
Powder Bed ◽  
X Ray ◽  
X Ray Imaging ◽  
Spreading Dynamics

scholarly journals In-situ Observations of Directed Energy Deposition Additive Manufacturing Using High-Speed X-ray Imaging

JOM ◽  
2020 ◽  
Vol 73 (1) ◽  
pp. 189-200 ◽  
Author(s):  
Sarah J. Wolff ◽  
Samantha Webster ◽  
Niranjan D. Parab ◽  
Benjamin Aronson ◽  
Benjamin Gould ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
High Speed ◽  
Energy Deposition ◽  
X Ray ◽  
Directed Energy Deposition ◽  
X Ray Imaging ◽  
In Situ Observations ◽  
Directed Energy

scholarly journals Investigating Powder Spreading Dynamics in Additive Manufacturing Processes by In-situ High-speed X-ray Imaging

2019 ◽  
Vol 32 (2) ◽  
pp. 9-13 ◽  
Author(s):  
Luis I. Escano ◽  
Niranjan D. Parab ◽  
Lianghua Xiong ◽  
Qilin Guo ◽  
Cang Zhao ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
High Speed ◽  
Manufacturing Processes ◽  
X Ray ◽  
X Ray Imaging ◽  
Spreading Dynamics

scholarly journals In-situ high-speed X-ray imaging of piezo-driven directed energy deposition additive manufacturing

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Sarah J. Wolff ◽  
Hao Wu ◽  
Niranjan Parab ◽  
Cang Zhao ◽  
Kornel F. Ehmann ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
High Speed ◽  
Energy Deposition ◽  
X Ray ◽  
Directed Energy Deposition ◽  
X Ray Imaging ◽  
Directed Energy

UFO — a scalable platform for high-speed synchrotron X-ray imaging

2016 ◽  
Author(s):  
Andreas Kopmann ◽  
Suren Chilingaryan ◽  
Matthias Vogelgesang ◽  
Timo Dritschler ◽  
Andrey Shkarin ◽  
...  
Keyword(s):  
High Speed ◽  
X Ray ◽  
X Ray Imaging

syris: a flexible and efficient framework for X-ray imaging experiments simulation

2017 ◽  
Vol 24 (6) ◽  
pp. 1283-1295 ◽  
Author(s):  
Tomáš Faragó ◽  
Petr Mikulík ◽  
Alexey Ershov ◽  
Matthias Vogelgesang ◽  
Daniel Hänschke ◽  
...  
Keyword(s):  
Motion Estimation ◽  
Data Processing ◽  
Graphics Processing Units ◽  
High Speed ◽  
Real Data ◽  
Estimation Accuracy ◽  
Processing Parameter ◽  
X Ray ◽  
X Ray Imaging ◽  
Imaging Conditions

An open-source framework for conducting a broad range of virtual X-ray imaging experiments,syris, is presented. The simulated wavefield created by a source propagates through an arbitrary number of objects until it reaches a detector. The objects in the light path and the source are time-dependent, which enables simulations of dynamic experiments,e.g.four-dimensional time-resolved tomography and laminography. The high-level interface ofsyrisis written in Python and its modularity makes the framework very flexible. The computationally demanding parts behind this interface are implemented in OpenCL, which enables fast calculations on modern graphics processing units. The combination of flexibility and speed opens new possibilities for studying novel imaging methods and systematic search of optimal combinations of measurement conditions and data processing parameters. This can help to increase the success rates and efficiency of valuable synchrotron beam time. To demonstrate the capabilities of the framework, various experiments have been simulated and compared with real data. To show the use case of measurement and data processing parameter optimization based on simulation, a virtual counterpart of a high-speed radiography experiment was created and the simulated data were used to select a suitable motion estimation algorithm; one of its parameters was optimized in order to achieve the best motion estimation accuracy when applied on the real data.syriswas also used to simulate tomographic data sets under various imaging conditions which impact the tomographic reconstruction accuracy, and it is shown how the accuracy may guide the selection of imaging conditions for particular use cases.

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
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