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Volume 26 Issue 3
Mar.  2019
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文章导航 >  矿物冶金与材料学报（英文）  > 2019  >  26(3): 369-376
Zheng-jie Shao, Hai-po Liu, Xiao-chun He, Bing Zhou, Yang Li, Shang-zhou Zhang, Meng-jin Li,  and Shu-jun Li, Microstructure and finite element analysis of hot continuous rolling of doped tungsten rod, Int. J. Miner. Metall. Mater., 26(2019), No. 3, pp. 369-376. https://doi.org/10.1007/s12613-019-1746-4
Cite this article as:
Zheng-jie Shao, Hai-po Liu, Xiao-chun He, Bing Zhou, Yang Li, Shang-zhou Zhang, Meng-jin Li,  and Shu-jun Li, Microstructure and finite element analysis of hot continuous rolling of doped tungsten rod, Int. J. Miner. Metall. Mater., 26(2019), No. 3, pp. 369-376. https://doi.org/10.1007/s12613-019-1746-4
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研究论文

Microstructure and finite element analysis of hot continuous rolling of doped tungsten rod

  • School of Nuclear Equipment and Nuclear Engineering, Yantai University, Yantai 264005, China

  • Weihai Multicrystal Tungsten & Molybdenum Technologies Co., Ltd., Weihai 264202, China

  • Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

  • 通讯作者:

    Yang Li    E-mail: liyangytu@163.com

    Shang-zhou Zhang    E-mail: szzhangyt@163.com

  • The microstructures of doped tungsten deformed by multi-pass hot continuous rolling were investigated, and the stress and strain fields were simulated by finite element (FE) method. After the continuous rolling, the grains of the tungsten rod were refined, and the microhardness was improved; however, a ring region of abnormal grain growth was present at a distance of about 3/5R (R is the radius of the rod) from the center of the cross section. FE modeling results showed that the equivalent residual strains were minimum around the region of abnormal grain growth; this was due to the release of strain energy by severe plastic deformation, leading a situation where the migration force of grain boundaries was higher than the pinning force of potassium bubbles. By decreasing the initial rolling temperature and rolling speeds, the inhomogeneity of the equivalent residual stain decreased, improving the microstructure uniformity of the doped tungsten.
    • Research Article

    Microstructure and finite element analysis of hot continuous rolling of doped tungsten rod

    + Author Affiliations
      Abstract
    • The microstructures of doped tungsten deformed by multi-pass hot continuous rolling were investigated, and the stress and strain fields were simulated by finite element (FE) method. After the continuous rolling, the grains of the tungsten rod were refined, and the microhardness was improved; however, a ring region of abnormal grain growth was present at a distance of about 3/5R (R is the radius of the rod) from the center of the cross section. FE modeling results showed that the equivalent residual strains were minimum around the region of abnormal grain growth; this was due to the release of strain energy by severe plastic deformation, leading a situation where the migration force of grain boundaries was higher than the pinning force of potassium bubbles. By decreasing the initial rolling temperature and rolling speeds, the inhomogeneity of the equivalent residual stain decreased, improving the microstructure uniformity of the doped tungsten.
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