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