Vliv vodíku na vlastnosti niklových superslitin připravených 3D tiskem

Abstract

This thesis investigates the influence of hydrogen on the mechanical properties and fracture characteristics of nickel superalloys primarily prepared by 3D printing, specifically through Laser Powder Bed Fusion (L-PBF). The main objective was to compare the properties of the IN 738LC material produced by 3D printing to identify potential weaknesses of this manufacturing technique in the context of resistance to hydrogen exposure. Samples made by traditional casting were used secondarily as a reference point to reveal specific defects and limitations associated with 3D printing. Experimental evaluations included tensile tests and fracture surface analysis, with results indicating that hydrogen impacts the mechanical properties of 3D printed superalloys. The research provides important insights into the effect of hydrogen on IN 738LC superalloys and highlights specific challenges in using 3D printing for applications in highly demanding industrial sectors, such as the aerospace industry.