Virtual Section Meeting: Alternating Current Field Measurement (ACFM)

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Explore how alternating current field measurement (ACFM) detects and sizes surface-breaking cracks through coatings, without calibration, offering advantages over magnetic particle and eddy current methods.


Member: Free
Nonmember/Associate: $29*
*For member pricing, upgrade your membership.
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On-demand
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Online
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1 hour

Credit Info

  • Contact Hours: 1 
  • IACET CEUs: N/A 
  • Valid for ASNT Level III recertification: Yes

Original air date: 15 July 2021

Course Overview

ACFM is an electromagnetic nondestructive testing technique that provides one-pass inspection and is capable of detecting and sizing surface or near-surface breaking cracks in metals. The technique is suited for inspecting painted welded structures without removing the paint.

A modern ACFM inspection system comprises a field-inducing probe with state-of-the-art low-noise analogue electronics coupled with a built-in control system and easy-to-use Microsoft Windows-based analysis software. The use of mathematical models to predict crack size. The models predict how electromagnetic fields are affected by the presence of a breaking fatigue crack.

Advantages of the ACFM technique compared to magnetic particle and eddy current NDT inspection techniques:

  • The ability to detect defects through 2.5-5mm (0.1”-0.2”) thick or more of non-conductive coating.
  • The ability to obtain depth information on cracks up to 1 inch (25mm) deep.
  • Easy testing at the material boundary
  • No requirement for onsite calibration
  • Detection and sizing in one instrument

Meet the Speaker

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Hussein Sadek

Hussein M. Sadek, MBA, PMP, is President and CEO of Technologies Consulting International and an ASNT Level III with over 45 years of experience in NDT consulting, training, and inspection. A past ASNT and NDTMA president, he is a recognized expert in electromagnetic techniques, especially ACFM. Sadek has received numerous ASNT honors and currently chairs the ASNT Awards and Honors Council. He continues to serve the industry through leadership, authorship, and technical advancement.

Questions? Contact us at education@asnt.org

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