|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Powder Metallurgy of Light Metals
||Enhanced Sintering Kinetics in AA5083 Powder Processed Using DC Electric Fields
||Brandon McWilliams, Jian Yu, Steven Kilczewski
|On-Site Speaker (Planned)
High electric current has been shown to enhance sintering kinetics in aluminum 5083 (AA5083) alloy powders using such techniques as Spark Plasma Sintering (SPS). Despite the success in sintering AA5083, little work has been conducted which examines the underlying mechanisms leading to these enhanced kinetics or decoupling the effects of field strength versus current. In this work, pressure-less sintering was conducted using DC electric field strengths and amperages ranging from 0-55 V/cm and 0-3 A, respectively, to examine the effect on the sintering kinetics of AA5083 powder. In-situ sintering kinetics were quantified using digital image correlation (DIC) and it was found that the application of a DC field results in a discontinuous change in volume at a critical temperature. This effect is similar to the process of “flash sintering” observed in ceramic powder processing. The “flash” temperature was found to decrease with increasing field strength.
||Planned: EPD Congress Volume