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首页> 外文期刊>Measurement Science & Technology >Crack detection in Al alloy using phase-contrast neutron radiography and tomography
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Crack detection in Al alloy using phase-contrast neutron radiography and tomography

机译：相衬中子射线照相和断层扫描技术检测铝合金中的裂纹

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摘要

A phase-contrast neutron tomography experiment has been carried out in order to verify the capability of this imaging technique to visualize cracks in a poor neutron absorber like an Al alloy. 2024 Al alloy fatigued specimens were used to this end. The results showed the effectiveness of the experimental method, putting into evidence how it can actually detect the cracks, while standard neutron radiography cannot. Some features of the cracks can be estimated as well, such as their length and through-thickness depth. The method could be helpful in detecting cracks and determining their morphology in Al alloys, eventually replacing synchrotron radiation mu-CT, especially in the case of massive samples (several cm), where x-rays are completely absorbed.
机译：为了验证这种成像技术可视化弱中子吸收器（如铝合金）中的裂纹的能力，已进行了相衬中子层析成像实验。为此，使用了2024铝合金疲劳试样。结果显示了该实验方法的有效性，证明了它实际上可以检测出裂纹，而标准中子射线照相则不能。裂缝的某些特征也可以估算出来，例如其长度和贯穿厚度。该方法可能有助于检测铝合金中的裂纹并确定其形貌，最终替代同步辐射mu-CT，尤其是对于大量吸收X射线的样品（几厘米）。

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