Analogic Engineering, Inc.

ElectroMagnetic Acoustic Transducer (EMAT) Research

2002   NSF SBIR Phase I Feasibility Study grant no. DMI-0128698, “Using   Variable Polarization Ultrasonic Shear Waves to Isolate and Quantify the Competing Effects of Microstructure and Stress on the Acoustic Properties of Steel.” Developed a proprietary Electro Magnetic Acoustic Transducer (EMAT) and instrumentation that uses variable polarization shear waves to measure longitudinal stress in steel.


2008   EMAT testing conducted on aluminum and stainless steel containing engineered defects (EDM and water-jet cut notches) that clearly indicated the presence of cracks. Of particular interest, defect indications showed cracks on the far surface and cracks located within pits.


2009    QNDE Annual Meeting in Rhode Island.

Paper titled “Polarized Shear Waves for Crack Detection and Characterization” by S. J. Turner and B. W. Maxfield published in Review of Progress in Quantitative Nondestructive Evaluation, Vol. 29.


2010    NSF SBIR Phase I Feasibility Study grant no. IIP-1014355 “Using Ultrasonic

         Shear Polarization Contrast to Locate and Size Defects."

Developed mathematical model to prove feasibility of detecting and sizing defects in steel structures and components using the EMAT, custom instrumentation and software.


Features & Benefits of the AEI EMAT


EMATs For Industry