Vývoj parametrů pro mikropórezní strukturu technologii LPBF

Abstract

This Master´s thesis deals with the development and optimization of process parameters of the laser selective powder bed melting (LPBF) technology in order to create a microporous structure from 316L stainless steel. The aim of the work is to experimentally verify the influence of selected parameters on the formation of porosity, its morphology and permeability and at the same time identify the boundaries of the technological process. The theoretical part describes the principles of additive manufacturing of metals with a focus on LPBF technology and factors influencing the formation of porosity. The experimental part of the work focuses on the design and implementation of an experiment in which the process parameters, in particular the scanning speed and hatch distance, were systematically changed. The evaluation of the created structures was carried out by a combination of 3D analysis using X-ray computed tomography (Micro-CT), 2D image analysis of metallographic sections and permeability tests. The results showed that an open and interconnected porous structure can be generated by a targeted reduction of the input energy. A range of process parameters was identified in which a functional microporous network is formed while maintaining the structural integrity of the material.