|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing Fatigue and Fracture V: Processing-Structure-Property Investigations and Application to Qualification
||The Role of Textures in Strengthening and Toughening of Directed Energy Deposited Steels
||Shihao Li, Upadrasta Ramamurty
|On-Site Speaker (Planned)
Adopting 316L stainless steel (SS) and H13 steel as model materials, we explored new strategies to produce mechanically robust materials via directed energy deposition (DED). Formation of distinct textures were realized within DED components by employing various combinations of processing parameters and laser scan strategies, as evidenced by detailed microstructural characterization conducted using OM, SEM, EBSD and TEM. The molten pool characteristics were identified to vary significantly with processing parameters and laser scan strategies, resulting in different thermal history and therefore the observed disparate microstructures in DED components. Dog-bone and compact tension samples were extracted and then mechanically test to evaluate correlations between crystal textures and mechanical performance of DED components. It was demonstrated that mechanical behaviors were influenced by textures within samples and underlying mechanisms were discussed in details.