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李 萍,林 泉,薛克敏,孙大智,甘国强,吴玉程.高压扭转变形对纯W再结晶行为的影响[J].稀有金属材料与工程(英文),2019,48(5):1677~1681.[Ping Li,Quan Lin,Kemin Xue,Dazhi Sun,Gan Guoqiang and Yucheng Wu.Effect of High-Pressure Torsion on Recrystallization Behavior of Pure Tungsten[J].Rare Metal Materials and Engineering,2019,48(5):1677~1681.]
Effect of High-Pressure Torsion on Recrystallization Behavior of Pure Tungsten
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Received:November 15, 2017  Revised:December 24, 2017
DOI:
Key words: Pure Tungsten  High-pressure torsion  Recrystallization behavior  Thermal stability
Foundation item:国家自然科学基金项目(面上项目)(项目号51675154),教育部新世纪优秀人才支持计划(NCET-13-0765),国际热核聚变实验堆(ITER)计划专项(2014GB121000)
Author NameAffiliation
Ping Li,Quan Lin,Kemin Xue,Dazhi Sun,Gan Guoqiang and Yucheng Wu  
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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.