Ultrasonic Testing of Materials

Air-coupled Ultrasonic Testing of Materials

Ultrasonic Thermometer for High Temperature Materials Testing

This past year there were a total of 14 faculty members involved in 40 sponsored research projects. Sponsors included government agencies, navy labs and industry. In addition to the sponsored faculty research there were 15 midshipmen involved in independent research projects with faculty, four of which were Bowman Scholars. Many of these projects were also funded by outside sponsors. Overall, 2...

Roughness Model for Adhesion Testing of Pharmaceutical Coating Materials

Objective Roughness is the main parameter in interlocking bonding mechanism. Yet there is no model designed to evaluate the effect of surface roughness on adhesion of coating materials in pharmaceutical sciences. Materials and Methods In this study polymethyl metacrylate spherical beads with different sizes were poured into 10 mm mold, then it was pressed by hand screw and finally heated to 141...

Application of Empirical Mode Decomposition for Ultrasonic Testing of Coarse-grained Materials

Abstract In ultrasonic testing of coarse-grained materials, signal to noise ratio (SNR) of testing signals is reduced seriously for the structure noise, and echoes from defects are difficult to be identified. In order to improve the SNR and the reliability of ultrasonic testing of coarse-grained materials, empirical mode decomposition (EMD) is introduced to process the testing signal here. Sign...

Ultrasonic Testing of Steel Castings

Calibration and Reference Blocks ................................................................. 7 Longitudinal Wave Probes ............................................................................. 7 Transverse Wave Probes ............................................................................. 10 Measurement of Steel Thickness ...........................................................