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Synchrotron imaging derived relationship between process parameters and build quality for directed energy deposition additively manufactured IN718

DOI: 10.1016/j.addlet.2023.100137 DOI Help

Authors: S. V. Notley (University of Sheffield) , Y. Chen (University College London; University of Manchester; RMIT University; The European Synchrotron Radiation Facility) , N. A. Thacker (University of Manchester) , P. D. Lee (University College London) , G. Panoutsos (University of Sheffield)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Additive Manufacturing Letters , VOL volume 861

State: Published (Approved)
Published: March 2023
Diamond Proposal Number(s): 20096

Open Access Open Access

Abstract: Laser additive manufacturing is transforming several industrial sectors, especially the directed energy deposition process. A key challenge in the widespread uptake of this emerging technology is the formation of undesirable microstructural features such as pores, cracks, and large epitaxial grains. The trial and error approach to establish the relationship between process parameters and material properties is problematic due to the transient nature of the process and the number of parameters involved. In this work, the relationship between process parameters, melt pool geometry and quality of build measures, using directed energy deposition additive manufacturing for IN718, is quantified using neural networks as generalised regressors in a statistically robust manner. The data was acquired using in-situ synchrotron x-ray imaging providing unique and accurate measurements for our analysis. An analysis of the variations across repeated measurements show heteroscedastic error characteristics that are accounted for using a principled nonlinear data transformation method. The results of the analysis show that surface roughness correlates with melt pool geometry while the track height directly correlates with process parameters indicating a potential to directly control efficiency and layer thickness while independently minimising surface roughness.

Journal Keywords: Laser Additive Manufacturing; Directed Energy Deposition; Neural Networks; Meltpool Geometry; in-situ x-ray imaging

Diamond Keywords: Additive Manufacturing

Subject Areas: Materials, Engineering, Information and Communication Technology

Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Added On: 14/03/2023 09:31


Discipline Tags:

Artificial Intelligence Materials Engineering & Processes Information & Communication Technologies Materials Science Engineering & Technology

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