J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (5): 858-864.DOI: 10.1016/j.jmst.2018.11.017

• Orginal Article • Previous Articles     Next Articles

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

Jing Xuea, Shenbao Jina?(), Xianghai Anb, Xiaozhou Liaob, Jiehua Lic, Gang Shaa?()   

  1. aHerbert Gleiter Institute of Nanoscience, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094,China
    bSchool of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW, 2006, Australia
    cInstitute of Casting Research, Montanuniversit?t Leoben, A-8700, Leoben, Austria
  • Received:2018-07-25 Accepted:2018-11-07 Online:2019-05-10 Published:2019-02-20
  • Contact: Jin Shenbao,Sha Gang
  • About author:

    1 These authors contribute equally to this paper.

Abstract:

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 deformation-induced 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.

Key words: High-pressure torsion, Atom probe tomography, Aluminum alloys, Grain boundary diffusion, Dislocation