On the interplay of internal voids, mechanical properties, and residual stresses in additively manufactured Haynes 282

• DOI: 10.1016/j.addma.2023.103749
• Publication Date: 2023-08-21T06:01:37Z
• Authors: Bryan Lim; Keita Nomoto; Amy J. Clarke; Sudarsanam Suresh...; Sophie Primig; Xiaozhou Liao; Andrew J. Breen; Simon P. Ringer
• Keywords: Internal stress

Complex geometries and topology optimisations for weight materials savings are leading drivers the additive manufacturing of Ni-based superalloys through electron beam powder bed fusion (PBF-EB). However, there is a marked departure in these geometrically complex components with respect to thermal signatures understood commonly studied prismatic PBF-EB test coupons. This often results unaccounted site-specific microstructure-property variations builds. Here, effects topological changes, such as intentionally engineered internal voids, on mechanical performance an as-fabricated Haynes 282 monolith revealed. The voids serve representative physical models changing boundary conditions build height. Complementary local nanoindentations, multi-scale microscopy, residual stress measurements were used understand mechanisms behind geometry-structure-property relationships. highlight effectiveness influence property response 282.