Process parameters in laser-based powder bed fusion (LBPF) play a vital role the part quality. In current study, influence of different novel scan strategies on residual stress, porosities, microstructure, and crystallographic texture has been investigated for complex L-shape parts made from nickel-based superalloy Inconel 718 (IN718). Four scanning representing total fill, re-melting, two sect...

This study explored the effect of porosity and installation angle, thickness (dimension) and second layer of permeable obstacles on density current control and trapping in the laboratory. For this purpose, an insoluble suspended polymer and two types of groove and cavity obstacles made from plexiglass sheets were selected. The experiments were conducted with two different concentrations, five d...

We present secondary electron yield (SEY) characterization of high porosity surfaces for multipactor-free microwave components. first calculate the SEYs through using Monte Carlo simulations. demonstrate that these can be treated as homogeneous materials with low effective SEYs. prove a significant SEY reduction is attainable by porosities, and above certain level, entire surface falls below un...