Effects of deformation conditions on the superplastic deformation behavior of LZ91 Mg-Li alloy under electric field

Effects of deformation conditions on the superplastic deformation behavior of LZ91 Mg-Li alloy under electric field

Bao Meng, Feng Pan, Jianqiang Yang, Dongsheng Li, Min Wan

Abstract. The electro-superplastic effect (ESP effect) can enhance the superplastic deformation ability of alloy, and can also make alloy with poor plasticity have superplastic properties. Diverse grain sizes of LZ91 Mg-Li alloy were successfully prepared through equal channel angular pressing (ECAP) process. In order to explore the superplastic deformation behavior of LZ91 Mg-Li alloy under the electric current, an electric field assisted superplastic uniaxial tensile test platform was designed and fabricated. A decreasing constant voltage electrification scheme was proposed, and the experiments under different current densities, initial strain rates and grain sizes were carried out. The results indicate that the true strain-stress curve of LZ91 Mg-Li alloy gradually comes to steady with the increase of current density, presenting a steady-state rheological characteristic. The initial strain rate has a significant effect on the superplastic deformation behavior of LZ91 Mg-Li alloy under high voltage condition. For the fine-grained LZ91 Mg-Li alloy, the electric field can effectively reduce the superplastic deformation temperature and considerably enhance the elongation. This paper enriches the understanding of the superplastic deformation behavior of LZ91 Mg-Li alloy under the action of electric field.

Keywords
Superplastic Deformation Behavior, LZ91 Mg-Li Alloy, Electric Field Assisted

Published online , 8 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Bao Meng, Feng Pan, Jianqiang Yang, Dongsheng Li, Min Wan, Effects of deformation conditions on the superplastic deformation behavior of LZ91 Mg-Li alloy under electric field, Materials Research Proceedings, Vol. 32, pp 111-118, 2023

DOI: https://doi.org/10.21741/9781644902615-12

The article was published as article 12 of the book Superplasticity in Advanced Materials

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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