Abstract: The subject matter disclosed herein relates to additive manufacturing techniques, and more specifically, to additive manufacturing techniques that involve binder jet printing. A disclosed additive manufacturing system for fabricating an article includes a build unit and a positioning system operably coupled to the build unit. The positioning system is configured to move the build unit in at least three dimensions. The build unit includes a recoater portion configured to deposit a layer of powder within a build area of the additive manufacturing system. The build unit also includes a binder jetting portion configured to selectively deposit and cure a binder within a periphery of the deposited layer of powder to form a dynamic build envelope around the article being fabricated in the build area.

Abstract: A green body multi-sectional binder jet printed part includes a plurality of binder jet printed strategic sections. Each of the plurality of strategic sections comprises a powdered material adhered together with at least one binder and define a portion of an internal feature of the green body multi-sectional part. The plurality of binder jet printed strategic sections are adhered together by a modified binder disposed at interfaces between the plurality of binder jet printed strategic sections of the green body multi-sectional part.