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LIU Wenjin, YANG Weitao, YANG Qi, ZHAN Ke. Effect of Grain Size on Quasi-static Mechanical Properties of Low StackingFault Energy Fe-Mn-Si-Al Austenitic Alloy Steel[J]. Materials and Mechanical Engineering, 2020, 44(8): 10-16. DOI: 10.11973/jxgccl202008003
Citation: LIU Wenjin, YANG Weitao, YANG Qi, ZHAN Ke. Effect of Grain Size on Quasi-static Mechanical Properties of Low StackingFault Energy Fe-Mn-Si-Al Austenitic Alloy Steel[J]. Materials and Mechanical Engineering, 2020, 44(8): 10-16. DOI: 10.11973/jxgccl202008003
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Effect of Grain Size on Quasi-static Mechanical Properties of Low StackingFault Energy Fe-Mn-Si-Al Austenitic Alloy Steel

  • 1. School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;

  • 2. Shanghai Key Laboratory of Engineering Materials Application and Evaluation, Shanghai Research Institute of Materials, Shanghai 200437, China

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  • Received Date: April 30, 2020
  • Revised Date: June 29, 2020
    Graphical Abstract
    • Abstract
  • The cold rolled Fe-29.8Mn-5.0Si-1.7Al austenitic steel with low stacking fault energy was annealed at different temperatures (700,730,800,900,1 000,1 100,1 200 ℃). The influence of original austenite grain size on quasic-static mechanical properties and phase transformation behavior during deformation of the steel was studied. With the annealing temperature (above 730 ℃) increasing, obvious static recrystallization occurred on the alloy steel, the grain size increased, and the microstructure was single austenite. Recrystallized annealed alloy steel underwent ε-martensitic transformation during tensile deformation, the fine-grained structure (austenite grain size was less than 21 μm) was conducive to the alloy steel to obtain high yield strength and high tensile strength, and the coarse-grained structure (austenite grain size was greater than 90 μm) was beneficial to improve the plasticity, because of evenly distributed and intersecting multiple variants ε-martensite formed in coarse austenite grains.
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    • References (25)
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