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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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    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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[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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History
  • Received:September 17,2019
  • Revised:November 15,2019
  • Adopted:November 19,2019
  • Online: November 04,2020
  • Published: