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孙大智,李萍,林泉,华睿,薛克敏,吴玉程.多向锻造纯钨形变储存能及动态再结晶行为分析[J].稀有金属材料与工程(英文),2018,47(3):937~942.[Sun Da-zhi,Li Ping,Lin Quan,Hua Rui,Xue Ke-min,Wu Yu-cheng.Analysis of deformation stored energy and dynamic recrystallization behavior of pure tungsten processed by multiple direction forging[J].Rare Metal Materials and Engineering,2018,47(3):937~942.]
Analysis of deformation stored energy and dynamic recrystallization behavior of pure tungsten processed by multiple direction forging
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Received:February 12, 2016  Revised:May 06, 2016
DOI:
Key words: Multiple direction forging  deformation stored energy  dislocation  dynamic recrystallization  high-angle grain boundaries
Foundation item: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计划(2014GB121000);
Author NameAffiliationE-mail
Sun Da-zhi School of Materials Science and Engineering,Hefei University of Technology sundz1991@126.com 
Li Ping School of Materials Science and Engineering,Hefei University of Technology li_ping@hfut.edu.cn 
Lin Quan School of Materials Science and Engineering,Hefei University of Technology  
Hua Rui Anhui Jiang Huai Automobile Corp  
Xue Ke-min School of Materials Science and Engineering,Hefei University of Technology  
Wu Yu-cheng School of Materials Science and Engineering,Hefei University of Technology  
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Abstract:
      Microstructure evolution and deformation stored energy change of sintered pure tungsten during multi-directional forging was investigated by OM and DSC. The source of deformation stored energy and dynamic recrystallization behavior of pure tungsten were studied with XRD and EBSD. The results indicate that dynamic recrystallization during hot deformation leads to remarkably grain refining with porosity significantly reduced. High-density dislocation structure retained in the grain and subgrain result in an increase in deformation stored energy after deformation. There are quantities of recrystallized grains distributed along the higher energy zone in grain boundaries and grain boundary Intersection. The mechanism of dynamic recrystallization is the mixture of deformation induced grain boundary migration mechanism with subgrain coarsening and grain mechanical fragmentation. The recrystallization temperature of pure tungsten unchanged substantially with thermal stability increased after multiple direction forging.