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Analysis of EBSD image quality related to microstructure evolution in zirconium–niobium cladding to quantify the degree of recrystallization
Journal of Nuclear Materials ( IF 3.1 ) Pub Date : 2018-06-15 , DOI: 10.1016/j.jnucmat.2018.06.010
Tae-Sik Jung , Hun Jang , Yong-Kyoon Mok , Jong-Sung Yoo

Zirconium alloy claddings used in nuclear power plants, when subjected to final annealing after cold-pilgering, exhibit a recrystallization degree that renders them suitable for in-pile applications. Because the degree of recrystallization can influence fuel performance, its accurate and simple measurement is important from the perspective of producing nuclear fuel cladding. Recently, methods for calculating the recrystallization degree using information obtained from electron backscatter diffraction (EBSD) measurements have been reported, including a calculation method based on the distribution of the image quality values. However, no studies have been reported on determining the recrystallization degree of zirconium using image quality. To apply this method to zirconium, we first analyzed the correlation between microstructural changes and image quality of zirconium cladding. The appearance of newly formed microstructures was observed as a change in the image quality frequency distribution, and its shape was analyzed using various results obtained with the aid of EBSD software and previously reported details of the recrystallization behavior of zirconium. On the basis of this information, a new calculation formula suitable for recrystallization calculations for a zirconium–niobium cladding tube was derived and subsequently compared with the calculation formula presented in a previous study.



中文翻译:

分析与锆-铌熔覆层的微观结构演变有关的EBSD图像质量,以量化重结晶程度

核电站中使用的锆合金熔覆层在冷熔接后进行最终退火时,会表现出重结晶度,使其适合于桩内应用。由于重结晶程度会影响燃料性能,因此从生产核燃料包壳的角度来看,其准确而简单的测量非常重要。近来,已经报道了使用从电子背散射衍射(EBSD)测量获得的信息来计算重结晶度的方法,包括基于图像质量值的分布的计算方法。然而,尚未报道使用图像质量确定锆的重结晶度的研究。要将这种方法应用于锆,我们首先分析了锆熔覆层的微观结构变化与图像质量之间的相关性。观察到新形成的微观结构的出现是图像质量频率分布的变化,并使用借助EBSD软件获得的各种结果以及先前报道的锆重结晶行为的详细信息来分析其形状。在此信息的基础上,得出了适用于锆铌包层管再结晶计算的新计算公式,随后将其与先前研究中提出的计算公式进行了比较。借助EBSD软件获得的各种结果以及先前报道的锆重结晶行为的详细信息,分析了其形状。在此信息的基础上,得出了适用于锆铌包层管再结晶计算的新计算公式,随后将其与先前研究中提出的计算公式进行了比较。借助EBSD软件获得的各种结果以及先前报道的锆重结晶行为的详细信息,分析了其形状。在此信息的基础上,得出了适用于锆铌包层管再结晶计算的新计算公式,随后将其与先前研究中提出的计算公式进行了比较。

更新日期:2018-06-15
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