G.L. Knapp

TL;DR: In this article, a digital twin of the laser-based directed energy deposition additive manufacturing (DED) process is proposed to provide accurate predictions of the spatial and temporal variations of metallurgical parameters that affect the structure and properties of components.

TL;DR: In this article, the authors focus on the available mechanistic models of additive manufacturing (AM) that have been adequately validated and evaluate the functionality of AM models in understanding of the printability of commonly used AM alloys and the fabrication of functionally graded alloys.

TL;DR: In this article, the authors developed, tested and utilized a three-dimensional heat transfer and fluid flow model of wire arc additive manufacturing (WAAM) to calculate temperature and velocity fields, deposit shape and size, cooling rates and solidification parameters.

TL;DR: In this article, a Monte Carlo method based grain growth model was used to examine the influence of various causative factors on the growth of columnar grains in a multi-layer laser deposition of Inconel 718.

TL;DR: In this article, the role of physical phenomena such as heat transfer and vaporization on determining the solidification morphology have been investigated quantitatively, and the effect of spot density during pulsing, which relates to the amount of heating of the build area during processing, on the columnar-to-equiaxed transition of the solidified structure was studied both experimentally and theoretically.