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  • Advances in Hand-Held Ultrasonic Thickness Gages with Live Color Waveforms (A-Scan) (.pdf)
    Ultrasonic thickness gages have progressed a long way since their early development in the 1960's. The first thickness gages were large and bulky although they used the same conventional longitudinal (compressional wave) techniques still in use today. Thickness gages are used in a wide variety
  • Ultrasonic Technique and Device for Residual Stress Measurement
    System, housed in a laptop, for analysis of the influence of residual stresses on the fatigue life of welded elements. In general, the ul-trasonic method allows one to measure the residual stresses in both cases: averaged through thickness or in surface layers. The present version of UCC allows
  • Application of Ultrasonic Peening for Fatigue Life Improvement of Automotive Welded Wheels
    The efficiency of Ultrasonic Peening (UP) application for fatigue life improvement of automotive welded wheels was studied based on the results of fatigue testing of real wheels in as-welded condition and after application of the UP. During the fatigue loading, the cracks initiate in the weld toe
  • Applying Infrared Imaging Techniques to Marine Surveying ... continued
    Audio gauging or ultrasonic thickness (UT) measurements are a common non-destructive testing method employed to determine the thickness of the metal and extent of corrosion based on the known original thickness of the metal plate. During the preparation for UT measurements, by chance I pulled out
  • MICRO: Defect/Yield Analysis & Metrology
    are especially valuable for CMP process development and control. The optoacoustic technique generates and detects ultrasonic waves using laser light, and, in contrast to profilometry, which measures surface topography, it measures metal thickness directly. For CMP applications, commercially available
  • Flowmeters Benefit From Silicon Advances
    is made of Teflon-PFA. Clamp-On Ultrasonic Meter in Weatherproof Enclosure Model 101WP ultrasonic hybrid flowmeter uses either transit-time or phase-shift mode to measure flows in liquid-filled pipes sized -in. to 360-in. in diameter. Options include a pipewall thickness gauge and single or dual channel
  • Air-Coupled Acoustics: Sound PAT for Tablet Characterization
    of Drug Tablets. In: Advanced Ultrasonic Methods for Material and Structure Inspection. ISTE Science and Technical Publishing, London 316-369 (2006). Akseli, I., Cetinkaya, C. Drug Tablet Thickness Estimations Using Air-Coupled Acoustics, International Journal of Pharmaceutics. 351: 165-173 (2008
  • MICRO: Defect/Yield Analysis and Metrology - Collins (June 2000)
    the days when process engineers estimated single-layer film thickness by comparing the color of the deposited film with color charts. Today, ellipsometers routinely support semiconductor production, giving process engineers fast, accurate, and repeatable thickness measurements for each individual
  • Ultrasound scans IN THIN AIR
    Better transducers and inexpensive, high-accuracy gantries expand the scope of noncontact ultrasound imaging. The marriage of Airtech 4000 ultrasonic imagers and Techno-Isel gantries lets users generate ultrasound-image scans without having the probe touch the sample. The gantry accurately moves

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