Crack detection in Al alloy using phase-contrast neutron radiography and tomography
Crack detection in Al alloy using phase-contrast neutron radiography and tomography
复制标题
使用相衬中子射线照相和断层扫描检测铝合金中的裂纹
DOI：
10.1088/0957-0233/17/9/015
复制
发表时间：
2006
影响因子：
2.4
通讯作者：
G. Albertini
中科院分区：
文献类型：
--
作者：
F. Fiori;A. Hilger;N. Kardjilov;G. Albertini
为了验证这种成像技术对可视化像铝合金这样的弱中子吸收体中的裂纹的能力，进行了一项相衬中子断层扫描实验。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，证明了它实际上如何能够检测到裂纹，而标准中子射线照相术则不能。裂纹的一些特征也能够被估算，例如它们的长度和贯穿厚度的深度。该方法可能有助于检测铝合金中的裂纹并确定其形态，最终取代同步辐射μ - CT，特别是在大尺寸样品（几厘米）的情况下，此时X射线被完全吸收。
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 μ-CT, especially in the case of massive samples (several cm), where x-rays are completely absorbed.