Abstract
Laser Powder Bed Fusion and Direct Energy Deposition processes have complementary characteristics. Their hybridization can increase the variety of applications for additive manufacturing. This paper investigates the static and fatigue behaviors of hybrid Inconel 625 parts using monotonic and high cycle fatigue tests, local strain measurements and self-heating method. Fatigue properties of as-built and recrystallized LPBF, DED and hybrid Inconel 625 were evaluated and compared. The effect of heat treatment on hybrid microstructure homogeneity was investigated. Their consequences on mechanical compatibility and fatigue strength were proved. The fatigue strength was attributed to the competition between defects and the strain compatibilities.
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