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

Internal stress
DOI: 10.1016/j.addma.2023.103749 Publication Date: 2023-08-21T06:01:37Z
ABSTRACT
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.
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