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Effect of High-Pressure Torsion on Recrystallization Behavior of Pure Tungsten
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Affiliation:

Hefei University of Technology

Clc Number:

TG311

Fund Project:

The National Natural Science Foundation of China (General Program, 51675154),Program for New Century Excellent Talents in University(NCET-13-0765),International Thermonuclear Experimental Reactor (ITER) Program (2014GB121000)

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    Abstract:

    The High-pressure torsion(HPT)deformation of sintered pure tungsten was carried out under low temperature condition. Recrystallization microstructures and behavior of pure W during the subsequent heating was analyzed under different torsion turns, which using a variety of detection and calculation methods such as EBSD, XRD and DSC. The results show that the deformation storage energy of pure W increases and the activation energy decreases after HPT deformation, but the recrystallization temperature is still high. Relative to obvious grain growth of the original sintered structure, recrystallized microstructure produced by HPT deformation is still small after DSC testing. The average grain size is about 4-6 μm. With the tortsion turns increases, grain size did not change significantly and deformed tissue is relatively stable.

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[Ping Li, Quan Lin, Kemin Xue, Dazhi Sun, Gan Guoqiang, Yucheng Wu. Effect of High-Pressure Torsion on Recrystallization Behavior of Pure Tungsten[J]. Rare Metal Materials and Engineering,2019,48(5):1677~1681.]
DOI:10.12442/j. issn.1002-185X.20171032

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History
  • Received:November 15,2017
  • Revised:December 24,2017
  • Adopted:December 26,2017
  • Online: June 04,2019
  • Published: