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<p>The influence of cold rolling reduction and annealing temperature on the microstructure and mechanical behavior of R60702 zirconium alloy has not been fully elucidated. In this study, R60702 zirconium alloy was subjected to varied cold rolling reduction followed by annealing at 400°C-600°C. A systematic analysis was conducted to examine the relationships among microstructural, texture evolution, and mechanical properties. The results show that the microstructure gradually changes from deformed fibrous bands to equiaxed grains after annealing. The strength decreases and the elongation increases significantly with the increase of annealing temperature. At the same annealing temperature, the grain size in the 1.5&#xa0;mm samples is finer than that in the 3&#xa0;mm. This phenomenon is attributed to the higher deformation energy stored in samples subjected to greater deformation, which provides a stronger driving force for recrystallization, promotes increased nucleation, and restricts grain growth. During the annealing process, the texture transitions from a B-type to a bimodal B texture, concomitant with a pronounced increase anisotropy.</p>

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Effects of Cold Rolling Reduction and Annealing Temperature on Microstructure, Texture, and Mechanical Properties of R60702 Zirconium Alloy

  • 期刊论文

  • 发表日期：

    2026年1月26日

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  • Xincheng Yan,
  • Changzheng Li,
  • Yuman Qin,
  • Yingjie Xie,
  • Zhimin Hou

摘要

The influence of cold rolling reduction and annealing temperature on the microstructure and mechanical behavior of R60702 zirconium alloy has not been fully elucidated. In this study, R60702 zirconium alloy was subjected to varied cold rolling reduction followed by annealing at 400°C-600°C. A systematic analysis was conducted to examine the relationships among microstructural, texture evolution, and mechanical properties. The results show that the microstructure gradually changes from deformed fibrous bands to equiaxed grains after annealing. The strength decreases and the elongation increases significantly with the increase of annealing temperature. At the same annealing temperature, the grain size in the 1.5 mm samples is finer than that in the 3 mm. This phenomenon is attributed to the higher deformation energy stored in samples subjected to greater deformation, which provides a stronger driving force for recrystallization, promotes increased nucleation, and restricts grain growth. During the annealing process, the texture transitions from a B-type to a bimodal B texture, concomitant with a pronounced increase anisotropy.