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Hot Deformation Behavior of the As-Cast Mg–10.13Li–2.83Zn–2.78Al–0.13Si Alloy

  • Shouyang Gao
  • Defu LiEmail author
  • Peng Du
  • Shengli Guo
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 217)

Abstract

Hot deformation behavior of Mg–10.13Li–2.83Zn–2.78Al–0.13Si alloy was investigated in the temperature range of 150–300 °C and strain rates from 0.001 to 10 s−1 by hot compression testing and a processing map was developed using Dynamic Material Model (DMM). According to the true stress–true strain curves, the flow stress behavior of the alloy was related to the coordinated deformation of α phase and dynamic recrystallization of β phase. The processing map exhibited only one safe domain occurring at 300 °C and 0.001 s−1 and its peak efficiency was 45%. The α phase had become fine and round because of the dissolution and precipitation behavior. But complete dynamic recrystallization occurred only in β phase. The instability region was also identified at the temperatures ranging from 150 to 220 °C and strain rates from 0.1 to 3 s−1. No defects, such as adiabatic shear bands or cracking, were observed in this region. Thus, the optimum thermal deformation parameter of the alloy in this experiment was 300 °C/0.001 s−1.

Keywords

Mg–Li alloy Hot deformation behavior Dynamic recrystallization Processing map 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.General Research Institute for Nonferrous MetalsBeijingChina

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