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Volume 26 Issue 5
May  2019
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文章导航 >  矿物冶金与材料学报（英文）  > 2019  >  26(5): 657-663
Bin Fang, Gao-feng Tian, Zhen Ji, Meng-ya Wang, Cheng-chang Jia, and Shan-wu Yang, Study on the thermal deformation behavior and microstructure of FGH96 heat extrusion alloy during two-pass hot deformation, Int. J. Miner. Metall. Mater., 26(2019), No. 5, pp. 657-663. https://doi.org/10.1007/s12613-019-1774-0
Cite this article as:
Bin Fang, Gao-feng Tian, Zhen Ji, Meng-ya Wang, Cheng-chang Jia, and Shan-wu Yang, Study on the thermal deformation behavior and microstructure of FGH96 heat extrusion alloy during two-pass hot deformation, Int. J. Miner. Metall. Mater., 26(2019), No. 5, pp. 657-663. https://doi.org/10.1007/s12613-019-1774-0
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研究论文

Study on the thermal deformation behavior and microstructure of FGH96 heat extrusion alloy during two-pass hot deformation

  • School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

  • Beijing Institute of Aeronautical Materials, Beijing 100095, China

  • 通讯作者:

    Zhen Ji    E-mail: jizhen@mater.ustb.edu.cn

  • The change rules associated with hot deformation of FGH96 alloy were investigated by isothermal two-pass hot deformation tests in the temperature range 1050-1125℃ and at strain rates ranging from 0.001 to 0.1 s-1 on a Gleeble 3500 thermo-simulation machine. The results showed that the softening degree of the alloy between passes decreases with increasing temperature and decreasing strain rates. The critical strain of the first-pass is greater than that of the second-pass. The true stress-true strain curves showed that single-peak dynamic recrystallization, multi- peak dynamic recrystallization, and dynamic response occur when the strain rate is 0.1, 0.01, and 0.001 s-1, respectively. The alloy contains three different grain structures after hot deformation:partially recrystallized tissue, completely fine recrystallized tissue, coarse-grained grains. The small-angle grain boundaries increase with increasing temperature. Increasing strain rates cause the small-angle grain boundaries to first increase and then decrease.
    • Research Article

    Study on the thermal deformation behavior and microstructure of FGH96 heat extrusion alloy during two-pass hot deformation

    + Author Affiliations
      Abstract
    • The change rules associated with hot deformation of FGH96 alloy were investigated by isothermal two-pass hot deformation tests in the temperature range 1050-1125℃ and at strain rates ranging from 0.001 to 0.1 s-1 on a Gleeble 3500 thermo-simulation machine. The results showed that the softening degree of the alloy between passes decreases with increasing temperature and decreasing strain rates. The critical strain of the first-pass is greater than that of the second-pass. The true stress-true strain curves showed that single-peak dynamic recrystallization, multi- peak dynamic recrystallization, and dynamic response occur when the strain rate is 0.1, 0.01, and 0.001 s-1, respectively. The alloy contains three different grain structures after hot deformation:partially recrystallized tissue, completely fine recrystallized tissue, coarse-grained grains. The small-angle grain boundaries increase with increasing temperature. Increasing strain rates cause the small-angle grain boundaries to first increase and then decrease.
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