|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Cast Shop Technology: An LMD Symposium in Honor of Wolfgang Schneider
||A Comparison of Cold and Hot PoDFA Procedure for Particle Monitoring in Liquid Aluminium
||Mark Badowski, Roland Schmoll
|On-Site Speaker (Planned)
PoDFA, widely used in Aluminium cast houses to monitor the concentration of non-metallic inclusions, takes a two-step approach. An initial filtration step increases the particle concentration to a level suitable for the subsequent metallographic investigation of the solidified filter cake, giving information on the amount and nature of the inclusions present. The filtration step is generally done on-site using the PoDFA equipment, but equipment availability or operational difficulties may make it necessary to apply the “Cold PoDFA” procedure. Here the liquid metal is solidified on-site and remelted offline before filtration.
Trials with simultaneous Hot PoDFA and Cold PoDFA sampling have been conducted in different alloy groups to evaluate a) the effect of the Cold PoDFA process onto the particle concentration, b) possible changes in the particle nature by reaction happening during remelting and c) the influence of the sample cooling rate and the remelting procedure on the PoDFA results.
||Planned: Light Metals Volume