|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||A Study of the Formation Mechanism of Mn Containing Precipitates during Homogenization in a 6xxx Series Aluminum Alloy
||Gongwang Zhang, Tongguang Zhai, Yi Han, Yi Xu, Hiromi Nagaumi, Gang Sha, Chad Parish, Donovan Leonard
|On-Site Speaker (Planned)
A 6xxx series Al alloy with addition of Mn, Cr and Cu was homogenized at temperatures ranging from 350 °C to 550 °C after casting. The formation mechanism of α-Al(MnCrFe)Si dispersoids during homogenization was systematically studied by using atom probe tomography and STEM with EDS in 6xxx series Al alloy. Lathe-shaped Q-AlMgSiCu phase was found to be the precursor phase for the formation of α-dispersoids. Atom probe tomography experiments revealed that segregation of Mn (Cr) occurred at the Q and matrix interface before decomposition of Q-phase. During the decomposition of the Q-phase, Cu first diffused away into the matrix, followed by Mg and Si. Upon Q-phase decomposition, Mn clusters were formed in place of the Q-phase with Si subsequently participating to form α-dispersoids.
||Planned: Light Metals Volume