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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(英文),2020,49(10):3377~3381.[Mingpan Wan,Te Zhu and 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.]
Defects and microstructural evolution of cold-rolled pure zirconium under isochronal annealing conditions
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Received:September 17, 2019  Revised:November 15, 2019
DOI:
Key words: Positron annihilation lifetime  pure zirconium  defects  isochronal annealing
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Author NameAffiliation
Mingpan Wan,Te Zhu and Qiu Xu  
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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.