DeepAI AI Chat
Log In Sign Up

Comprehensive process-molten pool relations modeling using CNN for wire-feed laser additive manufacturing

by   Noopur Jamnikar, et al.

Wire-feed laser additive manufacturing (WLAM) is gaining wide interest due to its high level of automation, high deposition rates, and good quality of printed parts. In-process monitoring and feedback controls that would reduce the uncertainty in the quality of the material are in the early stages of development. Machine learning promises the ability to accelerate the adoption of new processes and property design in additive manufacturing by making process-structure-property connections between process setting inputs and material quality outcomes. The molten pool dimensional information and temperature are the indicators for achieving the high quality of the build, which can be directly controlled by processing parameters. For the purpose of in situ quality control, the process parameters should be controlled in real-time based on sensed information from the process, in particular the molten pool. Thus, the molten pool-process relations are of preliminary importance. This paper analyzes experimentally collected in situ sensing data from the molten pool under a set of controlled process parameters in a WLAM system. The variations in the steady-state and transient state of the molten pool are presented with respect to the change of independent process parameters. A multi-modality convolutional neural network (CNN) architecture is proposed for predicting the control parameter directly from the measurable molten pool sensor data for achieving desired geometric and microstructural properties. Dropout and regularization are applied to the CNN architecture to avoid the problem of overfitting. The results highlighted that the multi-modal CNN, which receives temperature profile as an external feature to the features extracted from the image data, has improved prediction performance compared to the image-based uni-modality CNN approach.


page 5

page 10

page 11

page 12

page 13


MeltpoolNet: Melt pool Characteristic Prediction in Metal Additive Manufacturing Using Machine Learning

Characterizing meltpool shape and geometry is essential in metal Additiv...

A Reinforcement Learning Approach for Process Parameter Optimization in Additive Manufacturing

Process optimization for metal additive manufacturing (AM) is crucial to...

A hybrid deep learning model of process-build interactions in additive manufacturing

Laser powder bed fusion (LPBF) is a technique of additive manufacturing ...

Surrogate Modeling of Melt Pool Thermal Field using Deep Learning

Powder-based additive manufacturing has transformed the manufacturing in...

Growth of ZnO Thin Films on Silicon and Glass Substrate by Pulsed Laser Deposition

Thin films find a wide application in developing microelectronic devices...