| Abstract Scope |
Functionally graded material (FGM) is a material manufactured in which the structure or composition gradually changes with position. FGM has gradually changing mechanical, thermal, and chemical properties depending on the location. In fields such as aerospace, nuclear, and electronics, varying characteristics materials are applied. By FGM, the optimal combination of properties that goes beyond conventional materials is possible to secure. By laser metal 3D printing, it is possible to manufacture metal blocks with compositions adjusted according to location, and metal FGM research are actively progressing. In this study, FGM blocks in which the components gradually change by 1% at 0.3 mm intervals were fabricated from austenitic stainless steel STS316L and ferritic tool steel P21, and their microstructure and mechanical properties were analyzed. The dendrite, dual phase, segregation, and precipitation were analyzed according to the alloy components for each location, and the relationship with mechanical properties (hardness, tensile, impact) was investigated. |