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3D Simulations of OMEGA Implosions in Presence of Low Mode Asymmetries: Systematic Flow Anomalies and Impact of Low Modes on Implosion Performance

Colaitis, Arnaud; Igumenschev, Igor; Turnbull, David; Shah, Rahul; Edgell, Dana; Mannion, Owen M.; Stoeckl, Christian; Shvydky, Alex; Janezic, Roger; Kalb, Adam; Coa, Duc; Forrest, Chad; Kwiatkowski, Joe; Regan, Sean; Theobald, Wolfgang; Goncharov, Valeri; Froula, Dustin

Abstract not provided.

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TYPE Conference Presentation YEAR 2022
DOIOSTI

Electrical-Discharge-Machining Contamination Removal from Metal Additively Manufactured Components

Banga, Dhego O.; Chames, Jeffery M.; Yee, Joshua K.; Jankowski, Alan F.

The use of an electrochemical dissolution process is shown to remove the recast layer contamination from the surfaces of electrical-discharge-machining cut components, as well as the interior exposed surfaces of the structure. The solution chemistry, cell potential, and exposure time are all relevant interdependent variables. Optimization of the electrode geometry should be made for each type of component. For the case of Cu-Zn recast contamination of 300-series alloy components, surface composition analysis indicates that complete electrochemical dissolution is achieved using a dilute solution of nitric acid (HNO3). For example, electrochemical dissolution of the Cu-Zn recast is accomplished at 1.2 V cell potential using a 20% nitric solution and an exposure time of 4 h. The use of a nitric acid bath was specifically chosen since it’s chemically compatible and will not degrade the host alloy or the component. In sum, an electrochemically driven dissolution process can be tailored to remove of the recast contamination without affecting the integrity of the host component structure and its dimensional tolerances.

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TYPE SAND Report YEAR 2022
DOIOSTI
Results 7326–7350 of 99,299
Results 7326–7350 of 99,299