What are magnetic methods of testing used for?

Magnetic methods of testing are specifically designed to identify flaws and defects in ferro-magnetic materials, such as iron and its alloys. These techniques leverage the magnetic properties of ferro-magnetic substances to highlight irregularities like cracks, voids, or inclusions within the material. Common methods include magnetic particle testing, where particles are attracted to the area's magnetic field disrupted by a flaw, making defects visible. This approach is especially useful because it can quickly and effectively assess the integrity of components used in critical applications, such as in aerospace or automotive industries.

In contrast, enhancing the durability of materials, measuring tensile strength, or improving the aesthetic qualities of a product do not fall under the purview of magnetic testing methods. These aspects involve different approaches and methodologies, such as material treatments, mechanical testing, or surface finishing techniques, rather than magnetic property assessments.