|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Atom Probe Tomography for Advanced Characterization of Metals, Minerals and Materials
||Deformation-induced Mg Redistribution in Al-Mg Alloys Revealed Using Atom Probe Tomography
||Shenbao Jin, Jing Xue, Min Zha , Xianghai An, Xiaozhou Liao, Jiehua Li, Jiehua Li, Gang Sha
|On-Site Speaker (Planned)
Severe plastic deformation (SPD) techniques such as equal channel angular pressing (ECAP) and high pressure torsion (HPT) have been widely used to produce nano-structured and ultrafine-grained alloys. Besides grain refinement, a large scale redistribution of elements could take place at the same time during SPD, which may significantly alter the mechanical properties of the alloys. Therefore, a basic knowledge between deformation and redistribution characteristic of different elements must be established. In the present paper, the Al-Mg alloys with different Mg contents were subjected to different passes/turns of ECAP and HPT treatments. The distribution of Mg before and after deformation was examined using atom probe tomography (APT). Meanwhile, the crystallographic information was also extracted from APT datasets. The results indicate that a highly non-uniform distribution of Mg forms in the deformed microstructure, and the movements of the dislocations play an important role in the redistribution of Mg.
||Planned: Supplemental Proceedings volume