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<p>The present study proposes a methodology for the non-destructive testing of recrystallization phenomena in nickel-based single-crystal superalloys, utilizing synchrotron radiation diffraction extinction imaging technology. Recrystallization, a critical defect in turbine blades, has been shown to degrade the material's mechanical properties. However, traditional techniques such as electron backscatter diffraction still face challenges when inspecting the internal structure of the material. The use of high-energy synchrotron X-rays (50–300&#xa0;keV) allows for the simultaneous capture of both transmission extinction spots and diffraction spots during rotational scanning. This method has been demonstrated to generate recrystallization grain images with a resolution of 0.5&#xa0;μm. Through meticulous analysis of spot spacing and angles, the crystallographic families [111] can be identified. The validity of these results was subsequently verified by comparing them with EBSD results. This method provides a rapid, non-destructive testing approach for aerospace quality control, addressing a critical technological gap in turbine blade manufacturing.</p>

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Nondestructive Evaluation of Recrystallization in Ni-Based Single-Crystal Superalloys Using Synchrotron Radiation Diffraction Extinction Imaging

  • 期刊论文

  • 发表日期：

    2026年5月18日

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  • Zhimao Wang,
  • Gang Li,
  • Jie Zhang,
  • Yanping Wang,
  • Rui Sun,
  • Nan Li,
  • Xi Wang,
  • Zengyao Xing

摘要

The present study proposes a methodology for the non-destructive testing of recrystallization phenomena in nickel-based single-crystal superalloys, utilizing synchrotron radiation diffraction extinction imaging technology. Recrystallization, a critical defect in turbine blades, has been shown to degrade the material's mechanical properties. However, traditional techniques such as electron backscatter diffraction still face challenges when inspecting the internal structure of the material. The use of high-energy synchrotron X-rays (50–300 keV) allows for the simultaneous capture of both transmission extinction spots and diffraction spots during rotational scanning. This method has been demonstrated to generate recrystallization grain images with a resolution of 0.5 μm. Through meticulous analysis of spot spacing and angles, the crystallographic families [111] can be identified. The validity of these results was subsequently verified by comparing them with EBSD results. This method provides a rapid, non-destructive testing approach for aerospace quality control, addressing a critical technological gap in turbine blade manufacturing.