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（英文）  

Influence of Hydrogen Content on Microstructure and Crystallographic Orientation of Hydrides in Recrystallized Zr-Sn-Nb Tubes

作　　者：曾文[1,2] 邱日盛 栾佰峰[1] 陶勃然[1] 刘庆 Murty Korukonda L[3] 彭胜 王奔 高博 方强 Zeng Wen;Qiu Risheng;Luan Baifeng;Tao Boran;Liu Qing;Peng Sheng;Wang Ben;Gao Bo;Fang Qiang(Chongqing University,Chongqing 400044,China;Chongqing University of Science and Technology,Chongqing 401331,China;North Carolina State University,Raleigh,NC 27695-7909,USA;State Nuclear BAOTI Zirconium Industry Company,Baoji 721013,China;Panzhihua Iron and Steel Research Institute,Panzhihua 617000,China)

机构地区：[1]重庆大学,重庆400044 [2]重庆科技学院,重庆401331 [3]北卡罗莱纳州立大学,美国北卡罗莱纳洲罗利27695-7909 [4]国核宝钛锆业股份有限公司,陕西宝鸡721013 [5]攀枝花钢铁研究院,四川攀枝花617000

出　　处：《稀有金属材料与工程》2019年第5期1361-1370,共10页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51371202,51421001,51531005,51401187)

摘　　要：虽然已有较多锆合金氢化物的研究,但对于较高氢含量中锆合金氢化物的研究较少。首先对Zr-Sn-Nb管材在400℃下气相渗氢,通过保温不同时间获得具有3种不同氢含量(147、340、1480μg/g)的渗氢样品。随后采用OM、SEM、TEM和EBSD表征技术,研究了Zr-Sn-Nb管材中氢化物的微观结构与基体的晶体学取向关系。结果表明:氢含量影响管材中氢化物的取向,α-Zr基体与氢化物之间存在(0001)_α//{111}δ和{1017}α//{111}δ2种取向关系。EBSD分析表明,氢化物从一个基体晶粒向另一个基体晶粒生长时取向会随着基体晶粒取向的变化而变化。部分锆基体晶粒内同时有晶内氢化物和晶间氢化物,而只有晶内氢化物与锆基体有晶体学取向关系。Although there are many studies on the hydrides in zirconium alloys,the microstructure and crystallographic orientation of hydrides with higher hydrogen content have received little attention.The Zr-Sn-Nb alloy was charged with 147,340 and 1480 μg/g hydrogen by a gaseous hydriding procedure at 400 ℃ for different holding time.The microstructure and crystallographic orientation of hydrides were 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 and pole figure analyses.There are two orientation relationships between the α-Zr and the hydrides,namely (0001)α//{111}δ and {1017}α//{111}δ.EBSD analyses also reveal the changes in orientation of hydrides when hydrides grow from one matrix grain to another to accommodate the matrix modification.Besides,many Zr grains have both inter-granular and intra-granular hydrides,and only the intra-granular hydrides exhibit a habit relationship with the Zr grains.

关 键 词：锆合金 氢化物 晶体学取向 惯习面 氢含量 

分 类 号：TG146.414[一般工业技术—材料科学与工程]