(1. School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China) (2. Environmental Corrosion Center, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China)
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DOI:
10.7502/j.issn.1674-3962.2016.11.01
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Abstract:
Among all the structural metallic materials, magnesium alloys have the lowest density, higher specific strength and modulus. However, under plastic deformation conditions, magnesium alloys can exhibit the phenomenon of plastic instability, serrated flow or Portevin-Le Chatelier (PLC) effect, i.e. showing serrated waves on the stress-strain curves. Recently, research works about the PLC effects of magnesium alloys are widely carried out and increases annually. This paper is mainly concentrated on the research progress on PLC effect of magnesium alloys. The occurring conditions, characteristics of serration, effect of alloying elements on the PLC effect and relevant mechanisms are reviewed. Finally, the existing problems in current studies, research emphasis and direction in the future are also pointed out.