Kyung-Min Hong

TL;DR: In this article, the potential for the use of lightweight materials (aluminum alloys, magnesium alloys and titanium alloys) in high volume vehicle manufacturing is discussed. And the feasibility of implementing these techniques in the industrial setup is discussed, and mechanical properties of welds such as hardness, shear and tensile strength are analyzed.

TL;DR: In this article, a numerical model has been developed to predict the fusion zone (FZ), heat affected zone (HAZ), and microhardness of the welds produced on a 1.625mm thick Ti6Al4V titanium alloy using the IPG YLR-1000 fiber laser.

TL;DR: In this paper, a CNN-based monitoring model achieved a classification accuracy of 96.1% for porosity occurrence detection, though the prediction of micro (less than 100 µm) and deep subsurface pores still remains challenging.

TL;DR: In this article, the porosity and mechanical properties of laser welded joints were analyzed in terms of cooling rate and temperature gradient calculated from the predictive 3D welding model, and failure mechanisms during tensile-shear and cross-tension tests were also analyzed via finite element modeling.

TL;DR: In this article, a three-dimensional laser direct deposition (LDD) model was utilized to predict the geometry and thermal history of the multi-track LDD process and the predicted free surface geometry, fusion zone (FZ) and heat affected zone (HAZ) boundaries were in good agreement with experimental results.