Understanding formation of Mg-depletion zones in Al-Mg alloys under high pressure torsion

Jing Xue¹，Shenbao Jin¹，Xianghai An²，Xiaozhou Liao²，Jiehua Li³，Gang Sha¹

1. Herbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology2. School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney3. Institute of Casting Research, Montanuniversit?t Leoben

摘 要：Redistribution of elements may take place in alloys during severe plastic deformation, which significantly alters the mechanical properties of the alloys. Therefore, comprehensive knowledge about deformationinduced redistribution of elements has to be established. In the present paper, the distribution of Mg in an Al-Mg alloy processed by high pressure torsion was examined using atom probe tomography（APT）.With crystallographic information extracted by APT data analysis, this research reveals that the movement of dislocations plays an important role in the formation of Mg-depletion zones in the deformed microstructure.

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