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曾文,邱日盛,栾佰峰,陶勃然,刘庆,Murty K L,彭胜,王奔,高博,方强.氢含量对再结晶Zr-Sn-Nb管材氢化物微观结构及取向的影响[J].稀有金属材料与工程(英文),2019,48(5):1361~1370.[Zeng Wen,Qiu Risheng,Luan Baifeng,Tao Boran,Liu Qing,Murty Korukonda L.,Peng Sheng,Wang Ben,Gao Bo and Fang Qiang.Influence of hydrogen content on microstructure and crystallographic orientation of hydrides in recrystallized Zr-Sn-Nb tubes[J].Rare Metal Materials and Engineering,2019,48(5):1361~1370.]
Influence of hydrogen content on microstructure and crystallographic orientation of hydrides in recrystallized Zr-Sn-Nb tubes
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Received:December 19, 2017  Revised:March 20, 2019
DOI:
Key words: Zr alloy  hydride  crystallographic orientation  habit plane  hydrogen content
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliation
Zeng Wen,Qiu Risheng,Luan Baifeng,Tao Boran,Liu Qing,Murty Korukonda L.,Peng Sheng,Wang Ben,Gao Bo and Fang Qiang  
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Abstract:
      Although there are many studies on the hydrides in Zirconium alloys, the microstructure and crystallographic orientation of hydrides with higher hydrogen content has received little attention. The Zr-Sn-Nb alloy charged with 147, 340 and 1480 ppm of hydrogen by gaseous hydriding procedure at 400 ℃ with different holding time. The microstructure and crystallographic orientation of hydrides is investigated by a combination of optical microscopy (OM), scanning electron microscope (SEM), transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD) techniques. The results indicate that the orientation is affected by the hydrogen content. The interphase boundary components are used to evaluate the crystallographic orientation of hydrides along with pole figure analyses. We found that there are two orientation relationships between the α-Zr and the hydrides, i.e. (0001)α∥{111}δ and {10-17}α∥{111}δ. EBSD analyses also revealed changes in the orientation of hydrides when hydrides grew from one matrix grain to another to accommodate the matrix modification. Besides, there are many Zr grains with both inter-granular and intra-granular hydrides, and only the intra-granular hydrides exhibit habit relationships with the Zr grains.