In 1984, long before today’s high-res C-scans and AI-assisted flaw detection, a forward-thinking team at Battelle quietly mapped out the...

If you're scratching your head about permeability  in eddy current testing, you're not alone. Between relative permeability (μᵣ), the...

If you’ve ever stared blankly at some of Dr. Förster's impedance graphs, you’re not alone. There is a treasure-trove of information...

In the world of eddy current testing (ECT), few visual tools are as foundational as Dr. Friedrich Förster’s impedance plane diagrams....

Long before high-speed digital data acquisition, before laptops on carts and touchscreen instruments in the lab, there was the glow of a...

For this codebreaking session, refer to Figure 1. Figure 1 Fill Factor (η):  Defined as η= , it expresses the ratio of the test-object...

Back in 2009, an article in the ASNT Materials Evaluation laid out why industry simply couldn’t live without NDT. Today, nearly two...

In Eddy Current Testing (ECT), understanding how your test frequency relates to your specimen’s properties is crucial. Figure 1—the...

Ever wondered if your noodle is tuned more for wave mechanics, electromagnetic puzzles, or pattern-recognition marathons? Let’s take a...

In nondestructive testing (NDT), the Level III professional carries broad technical and procedural responsibility. From developing...

In the spring of 1953, hundreds of nondestructive testing (NDT) professionals gathered at the Western Metal Congress in Los Angeles,...

When we talk about the evolution of eddy current testing, names like Dr. Friedrich Förster come to mind—pioneers who laid the theoretical...

When we talk about cutting-edge NDT 4.0 technologies—array probes, AI-assisted signal classification, and real-time automated quality...

If you’re testing carbon steel or any ferromagnetic material with eddy currents, you’ve probably heard this advice: “Use higher...

In the aviation industry, tradition can be both a strength and a blind spot. Eddy current inspection procedures passed down from earlier...

By Edward Korkowski | eddycurrent.com The Fourth Industrial Revolution—better known as Industry 4.0—isn’t just transforming how we build...

In 2001, a pivotal study by Harris, Spanner, and Turnbow projected a significant decline in the nondestructive testing (NDT) workforce...

By Edward Korkowski - eddycurrent.com In April 1994, an ASNT article titled “Every Level III’s Responsibility”  delivered a powerful...

By Edward Korkowski - eddycurrent.com When we think of eddy current arrays  today, we imagine colorful C-scans, real-time imaging, and...

In the world of nondestructive testing (NDT), we often hear phrases like: “We validated the eddy current signal—it correlates well with...