Correlative Synchrotron X-Ray Imaging and Diffraction of Directed Energy Deposition Additive Manufacturing

Chen, Yunhui; Clark, Samuel J.; Collins, David M.; Marussi, Sebastian; Hunt, Simon A.; Fenech, Danielle; Connolley, Thomas; Atwood, Robert C.; Baxter, Gavin; Jones, Matthew; Leung, Chu Lun Alex; Lee, Peter

doi:10.2139/ssrn.3702822

Cited by 5 publications

(9 citation statements)

References 34 publications

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“…A Blown Powder Additive Manufacturing Process Replicator (BAMPR) was developed to faithfully replicate a commercial DED-AM system whilst operating at a synchrotron [8]. The X-ray images were captured to quantify the time-resolved multi-layer melt track morphology evolution of SS316L tracks on SS304 substrates for a wide range of processing parameters (laser power 100-200 W, powder feed rate 1-3 g/min, substrate traverse speed 0.833-3.34 mm/s), during DED-AM builds [for details of the methodology see Supplementary information].…”

Section: Experimental Methodsmentioning

confidence: 99%

“…However, a fundamental understanding of how transient mechanisms during the AM process (including melt the pool dynamics and defect formation) influence the final product is missing. High-flux, high energy third-generation synchrotron radiation sources [7] allow fast (millisecond to microsecond) X-ray imaging of the lasermatter interactions, which enables the investigation of phenomena occurring on the time and length scales associated with DED-AM [8]. In situ and operando high-speed X-ray investigations have enabled researchers to characterise the time-transient phenomena in the Laser Powder Bed Fusion (LPBF) process [9].…”

Section: Introductionmentioning

confidence: 99%

“…Wolff et al [10] mimicked some aspects of a DED-AM process by adopting a vibration-assisted device to deliver gravitational powder flow to a finely focused laser. Chen et al [8,11] developed a DED-AM process replicator that faithfully replicates a commercial DED-AM system whilst operating at a synchrotron, which is used in this study.…”

Section: Introductionmentioning

confidence: 99%

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In situ X-ray quantification of melt pool behaviour during directed energy deposition additive manufacturing of stainless steel

et al. 2021

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The Directed Energy Deposition Additive Manufacturing (DED-AM) of SS316L was studied using in situ and operando synchrotron X-ray imaging to quantitively understand the effect of processing parameters on the melt-pool morphology and surface quality. It was found that surface roughness of DED-AM builds can result from melt pool surface perturbations caused by changes in the melt flow and build stage motion perturbations. Process maps are developed that quantitatively correlate build quality to process parameters including powder feed rate, laser power and traverse speed. How the AM process parameters control build efficacy is clarified, and the processing conditions required to dampen surface perturbations leading to roughness were determined.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In situ X-ray quantification of melt pool behaviour during directed energy deposition additive manufacturing of stainless steel

et al. 2021

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“…This study reveals the mechanism controlling the formation of a highly nonequilibrium microstructure during DED‐AM. During the whole period, the spatial resolution was approximately 100 µm, and the temporal resolution was less than 1 ms 80 …”

Section: Ultrafast X‐ray Imagingmentioning

confidence: 99%

Section: Ultrafast X‐ray Imagingmentioning

confidence: 99%

Ultrafast imaging for uncovering laser–material interaction dynamics

Wang

Wei

Yuan

et al. 2022

Int Journal of Mech Sys Dyn

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The physical mechanism of the dynamics in laser–material interaction has been an important research area. In addition to theoretical analysis, direct imaging‐based observation of ultrafast dynamic processes is an important approach to understand many fundamental issues in laser–material interaction such as inertial confinement fusion (ICF), laser accelerator construction, and advanced laser production. In this review, the principles and applications of three types of commonly used ultrafast imaging methods are introduced, including the pump–probe, X‐ray diagnosis, and single‐shot optical burst imaging. We focus on the technical features such as the spatial and temporal resolution for each technique, and present several conventional applications.

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A quantitative study of thermal cycling along the build direction of Ti-6Al-4V produced by laser powder bed fusion

et al. 2023

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Correlative Synchrotron X-Ray Imaging and Diffraction of Directed Energy Deposition Additive Manufacturing

Cited by 5 publications

References 34 publications

In situ X-ray quantification of melt pool behaviour during directed energy deposition additive manufacturing of stainless steel

In situ X-ray quantification of melt pool behaviour during directed energy deposition additive manufacturing of stainless steel

Ultrafast imaging for uncovering laser–material interaction dynamics

A quantitative study of thermal cycling along the build direction of Ti-6Al-4V produced by laser powder bed fusion

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