Which of the following materials can be tested using Eddy Current Testing?

Eddy Current Testing (ECT) is particularly well-suited for non-ferrous metals such as aluminum, copper, and titanium because these materials conduct electricity and generate eddy currents effectively. The method relies on inducing electrical currents within the material using an oscillating magnetic field, and it is most effective with non-ferrous metals since they typically exhibit fewer issues with magnetic permeability and can be easily distinguished in terms of conductivity.

While ferrous metals can also be tested using ECT, the presence of ferromagnetic properties can influence the accuracy of the measurements due to factors like skin effect and magnetic permeability. Thus, while ECT is applicable to ferrous materials, the method's limitations and challenges often make it less ideal than with non-ferrous metals.

Composite materials, such as carbon fiber, generally do not conduct electricity and do not support the creation of eddy currents, rendering ECT ineffective for testing these types of materials.

Given this understanding, the choice that highlights non-ferrous metals aligns best with the core capabilities and typical use cases of Eddy Current Testing.