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冷轧纯锆在等时退火条件下的缺陷和组织演化
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1.贵州大学 材料与冶金学院;2.京都大学 复合原子力研究所

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Defects and microstructural evolution of cold-rolled pure zirconium under isochronal annealing conditions
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1.College of Materials and Metallurgy,Guizhou University;2.Institute for integrated radiation and nuclear science,Kyoto University,Kumatori-cho,Sennan-gun,Osaka,- Japan

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    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,随着冷轧变形量的增加到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。

    Abstract:

    The defects and microstructural evolution of cold-rolled pure zirconium with different deformation reduction 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 in the pure zirconium; The mean lifetime increased with increasing amount of deformation up to 10% and then saturated. with increasing cold-rolled reduction. Furthermore, vacancy clusters in the cold-rolled pure zirconium are not formed, and they did not grow even under the isochronal annealing conditions from 298~898 K . The vacancy and dislocation densities of the cold-rolled pure zirconium decrease with increasing the annealing temperature, and they were almost recovery at 873 K.

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万明攀,朱特,徐虬.冷轧纯锆在等时退火条件下的缺陷和组织演化[J].稀有金属材料与工程,2020,49(10):3377~3381.[Mingpan Wan, Te Zhu, Qiu Xu. Defects and microstructural evolution of cold-rolled pure zirconium under isochronal annealing conditions[J]. Rare Metal Materials and Engineering,2020,49(10):3377~3381.]
DOI:10.12442/j. issn.1002-185X.20190766

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  • 收稿日期:2019-09-17
  • 最后修改日期:2019-11-15
  • 录用日期:2019-11-19
  • 在线发布日期: 2020-11-04
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