In situ observation of melt pool evolution in ultrasonic vibration-assisted directed energy deposition.

ABSTRACT: The presence of defects, such as pores, in materials processed using additive manufacturing represents a challenge during the manufacturing of many engineering components. Recently, ultrasonic vibration-assisted (UV-A) directed energy deposition (DED) has been shown to reduce porosity, promote grain refinement, and enhance mechanical performance in metal components. Whereas it is evident that the formation of such microstructural features is affected by the melt pool behavior, the specific mechanisms by which ultrasonic vibration (UV) influences the melt pool remain elusive. In the present investigation, UV was applied in situ to DED of 316L stainless steel single tracks and bulk parts. For the first time, high-speed video imaging and thermal imaging were implemented in situ to quantitativ

SUBMITTER: El-Azab SA 

PROVIDER: S-EPMC10582076 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature