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Title: Gaussian process-based surrogate modeling framework for process planning in laser powder-bed fusion additive manufacturing of 316L stainless steel

Journal Article · · International Journal of Advanced Manufacturing Technology

Here, Laser Powder-Bed Fusion (L-PBF) metal-based additive manufacturing (AM) is complex and not fully understood. Successful processing for one material, might not necessarily apply to a different material. This paper describes a workflow process that aims at creating a material data sheet standard that describes regimes where the process can be expected to be robust. The procedure consists of building a Gaussian process-based surrogate model of the L-PBF process that predicts melt pool depth in single-track experiments given a laser power, scan speed, and laser beam size combination. The predictions are then mapped onto a power versus scan speed diagram delimiting the conduction from the keyhole melting controlled regimes. This statistical framework is shown to be robust even for cases where experimental training data might be suboptimal in quality, if appropriate physics-based filters are applied. Additionally, it is demonstrated that a high-fidelity simulation model of L-PBF can equally be successfully used for building a surrogate model, which is beneficial since simulations are getting more efficient and are more practical to study the response of different materials, than to re-tool an AM machine for new material powder.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1420279
Report Number(s):
LLNL-JRNL-726754
Journal Information:
International Journal of Advanced Manufacturing Technology, Vol. 94, Issue 9-12; ISSN 0268-3768
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 107 works
Citation information provided by
Web of Science

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Cited By (7)

Machine‐Learning‐Based Monitoring of Laser Powder Bed Fusion journal August 2018
Uncertainty Quantification in Metallic Additive Manufacturing Through Physics-Informed Data-Driven Modeling journal June 2019
Process Design of Laser Powder Bed Fusion of Stainless Steel Using a Gaussian Process-Based Machine Learning Model journal September 2019
Multiphysics modeling and simulation of laser additive manufacturing process journal December 2018
Uncertainty quantification of grain morphology in laser direct metal deposition journal April 2019
Layerwise Anomaly Detection in Laser Powder-Bed Fusion Metal Additive Manufacturing journal January 2019
A Review of Model Inaccuracy and Parameter Uncertainty in Laser Powder Bed Fusion Models and Simulations journal February 2019