The value of additively manufactured (AM) components with application in the aerospace industry can be assessed by subjecting them to realistic operational service conditions. While there is considerable knowledge about the tensile response of AM materials, minimal studies have considered the torsional and torsional-fatigue response of AM materials. A comprehensive understanding of the effect of both axial and torsional conditions of AM parts can allow for improvements in manufacturing design of components to effectively meet or exceed service requirements. This study is the first study to date, to investigate the torsional and torsional-fatigue response of as-built direct metal laser sintered (DMLS) stainless steel (SS) GP1, through monotonic torsion and completely reversed torsional fatigue experiments, for samples built at varying orientations in the horizontal xy build plane. Experimental results include monotonic torsional shear properties, torsional cyclic response, and fracture surfaces, which will be used to assess the torsional material response with regards to build orientation. Findings will be used to contribute to a much needed and comprehensive framework of the material behavior of AM components when subjected to axial/torsional loading conditions.

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