Unusually high room and elevated-temperature tensile properties observed in direct aged wire-arc directed energy deposited Inconel 718.

ABSTRACT: Wire-arc directed energy deposition (DED) processed Inconel (IN) 718 is known to have coarse columnar grains, strong texture, and significant chemical and microstructural inhomogeneity in the as-fabricated condition. Homogenization treatment is commonly used prior to aging to eliminate the inhomogeneity and detrimental precipitation for better mechanical properties. In this study, however, direct aging (DA) at 700 °C without homogenization has resulted in room-temperature yield strength, ultimate tensile strength (UTS), and elongation that are comparable to wrought condition and among the highest reported properties for wire-arc DED IN718. The DA samples at between 650 and 750 °C aging also demonstrates remarkable ductility when deformed at elevated temperatures. In addition, when aged bel

SUBMITTER: Song J 

PROVIDER: S-EPMC10628216 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature