Identification of the heat source and thermal material model parameters for the laser engineered net shaping


Identification of the heat source and thermal material model parameters for the laser engineered net shaping

Lucyna Hajder1, Tao Zhang2, Vu Nguyen3

1AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland.

2Institute for Frontier Materials, Deakin University, 75 Pigdons Road, Waurn Ponds VIC 3216, Australia.

3Commonwealth Scientific and Industrial Research Organisation (CSIRO), Manufacturing, Clayton, VIC 3168, Australia.

DOI:

https://doi.org/10.7494/cmms.2021.4.0765

Abstract:

The research’s primary goal is to identify the heat source and thermal material model parameters for the numerical simulation of the laser engineered net shaping (LENS). Inconel 718 was selected as a case study for the current investigation. The LENS process’s numerical model was developed within commercial finite element software and was used as a direct problem model during the parameter identification stage. Experimental data were obtained based on a rectangular-shaped sample with thermocouples located under the based material surface. The recorded thermal profiles were used to establish a goal function for the parameter identification stage. As a result, parameters describing the melt pool geometry during the additive manufacturing, as well as thermal coefficients describing interactions between the sample material and surrounding/base material, were determined.

Cite as:

Hajder, L., Zhang, T., & Nguyen, V. (2021). Identification of the heat source and thermal material model parameters for the laser engineered net shaping. Computer Methods in Materials Science, 22(1), pages. https://doi.org/10.7494/cmms.2021.4.0765

Article (PDF):

Accepted Manuscript – final pdf version coming soon

Keywords:

Additive manufacturing, Finite element analysis, Heat source model, Thermal analysis

References: