Influence of 3D printed part post-processing on tensile strength and surface roughness

U ovom diplomskom radu analiziran je utjecaj toplinske obrade žarenjem u soli na deformacije, rasteznu čvrstoću i hrapavost 3D ispisanih ispitnih tijela od PLA i PETG. Rad započinje uvodom, nakon kojega je opisana FFF tehnologija koja je korištena za ispis ispitnih tijela. Zatim je dan literaturni pregled ispitivanja rastezne čvrstoće i hrapavosti dijelova ispisanih FFF tehnologijom u kojemu su opisana načela ispitivanja navedenih mehaničkih svojstava. U sljedećem poglavlju opisani su postupci toplinske obrade za poboljšanje mehaničkih svojstava te njihov utjecaj na 3D ispisane dijelove ovisno o korištenim materijalima. Eksperimentalni dio rada sastoji se od opisa opreme korištene u eksperimentima, kao i samog provođenja eksperimenata, nakon čega su analizirani rezultati žarenja na više različitih temperatura.In this thesis the influence of thermal processing by the means of annealing in salt on deformations, tensile strength and roughness of 3D printed PLA and PETG parts is analyzed. The thesis begins with an introduction, after which FFF technology, which was used for printing test parts, is described. After that, a literature review of tensile strength and surface roughness testing of FFF printed parts is given. In the next chapter, various heat treatment processes for enchancing the mechanical properties are described, along with their influence on 3D printed parts depending on the material used. The experimental part of this thesis consists of the description of equipment used in experiments, along with the way said experiments were conducted, after which the results of annealing at various temperatures are analyzed