Marine environment effect on mechanical properties of additively manufactured steel

Završni rad se sastoji od dva dijela, teoretskog i eksperimentalnog. U teoretskom dijelu je obrađena tema aditivne proizvodnje metala te primjena aditivne proizvodnje u pomorstvu. Također je opisan nehrđajući čelik AISI 316L, njegove značajke i primjena u pomorstvu, kao i utjecaj korozije na metale. Kako bi se eksperimentalni dio proveo bilo je potrebno aditivnom i klasičnom proizvodnjom izraditi ispitne uzorke (epruvete) pogodne za vlačni test na kidalici kako bi se mogli usporediti rezultati dobiveni za isti materijal proizveden različitim postupcima. Uzorci su zatim podijeljeni u tri grupe te su izloženi različitim korozivnim uvjetima poput sobne atmosfere, ubrzanog korozijskog testa i korozivnog morskog okoliša na period od 30 dana. Uzorci su zatim prikupljeni te su im ispitana mehanička svojstva na kidalici. Na kraju je donesen zaključak o utjecaju morskog okoliša na mehaničke značajke aditivno proizvedenog čelika.The undergraduate thesis consists of two parts, theoretical and experimental. Theoretical part describes metal additive manufacturing and its application in marine industry. It also describes stainless steel AISI 316L, its mechanical properties and marine application, as well as corrosion effect on metals. To conduct the experimental part it was necessary to additively and classically manufacture test specimens applicable for tensile test to compare the results for the same material manufactured with different technologies. Specimens were then divided into three groups and exposed to different corrosive environments such as room atmosphere, accelerated corrosion test and corrosive marine environment for a period of 30 days. Specimens were then collected and their mechanical properties were tested after which the conclusion about marine environment effect on mechanical properties of additively manufactured steel was made