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田航,周军,公维佳,张海龙.Nb含量对Zr-xNb合金显微组织及再结晶过程的影响[J].稀有金属材料与工程(英文),2017,46(12):3994~3999.[Tian hang,Zhou Jun,Gong Weijia,Zhang Hailong.Influence of Nb content on microstructure and recrystallization process of Zr-xNb alloys[J].Rare Metal Materials and Engineering,2017,46(12):3994~3999.]
Influence of Nb content on microstructure and recrystallization process of Zr-xNb alloys
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Received:November 02, 2015  Revised:August 23, 2016
DOI:
Key words: Zirconium  alloy, recrystallization, microstructure,Precipitate
Foundation item:国家863项目基金资助(2012AA03A507)
Author NameAffiliationE-mail
Tian hang Western Energy Material Technologies Co,Ltd,Xi’an tianhangdap@foxmail.com 
Zhou Jun Western Energy Material Technologies Co,Ltd,Xi’an  
Gong Weijia State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing  
Zhang Hailong State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing hlzhang@ustb.edu.cn 
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Abstract:
      Niobium acts as a main alloying element in the third generation zirconium alloys. The role of Nb element in the alloys is greatly concerned. The influences of Nb content on the microstructure and recrystallization process of Zr-xNb (x=0, 0.3, 0.7, 1.0) alloys were studied by means of transmission electron microscopy (TEM), optical microscopy (OM) and Vickers micro-hardness testing. The results show that with increasing Nb content the quantity of the precipitates increases and the mean size of the precipitate particles decreases. Meanwhile, the recrystallization process is slowed down by the precipitates, especially in the case of Zr-1Nb alloy. The main precipitates were found to be Zr(Nb,Fe,Cr)2 and β-Nb in Zr-0.3Nb and Zr-1Nb, respectively.