冷轧纯锆在等时退火条件下的缺陷和组织演化  

Defects and Microstructural Evolution of Cold-rolled Pure Zirconium Under Isochronal Annealing Conditions

作　　者：万明攀[1,2] 朱特 徐虬 Wan Mingpan;Zhu Te;Xu Qiu(Guizhou University,Guiyang 550025,China;Kyoto University,Kumatori-cho,Sennan-gun,Osaka 590-0494,Japan;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]京都大学,大阪熊取町590-0494 [3]中国科学院高能物理研究所,北京100049

出　　处：《稀有金属材料与工程》2020年第10期3377-3381,共5页Rare Metal Materials and Engineering

基　　金：China Scholarship Council(CSC);National Natural Science Foundation of China(51401058)。

摘　　要：通过正电子湮没寿命(PAL)和透射电子显微镜(TEM)研究了不同程度冷轧纯锆在等时退火条件下的缺陷和显微组织演化行为。研究结果表明:纯锆经过冷轧变形产生高密度的位错和空位,随着冷轧变形量增加到10%,正电子的平均湮没寿命逐渐增加,变形量进一步增大,正电子的平均寿命趋于饱和。在温度范围298~898 K的等时退火条件下,冷轧纯锆中的空位型缺陷并没有聚集形成空位簇。随着退火温度增加,冷轧纯锆中的空位和位错密度逐渐减小,在退火温度为873 K时回复基本完成。The defects and microstructural evolution of cold-rolled pure zirconium with different deformation reduction under isochronal annealing condition were investigated using positron annihilation lifetime(PAL)and transmission electron microscopy(TEM).The results show cold-rolling deformation introduces dislocations and vacancies with high density into the pure zirconium;the mean lifetime increases with increasing the amount of deformation up to 10%and then saturates with increasing cold-rolling reduction.Furthermore,vacancy clusters in the cold-rolled pure zirconium do not form,and they do not grow even under the isochronal annealing conditions of 298~898 K.The vacancy and dislocation densities of the cold-rolled pure zirconium decrease with increasing the annealing temperature,and recovery almost finishes at 873 K.

关 键 词：正电子湮没寿命 纯锆 缺陷 等时退火 

分 类 号：TG146.414[一般工业技术—材料科学与工程] TG156.2[金属学及工艺—金属材料]