Additive manufacture of metal objects; inspection and part validation

Methods of testing the material of a metal object made by additive manufacturing. An electromagnetic acoustic transducer (EMAT) is used to transmit long duration acoustic signals into the object, and to receive response signals representing resonance of acoustic waves within the material. At least o...

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Bibliographic Details
Main Authors Cobb, Adam C, Parvin, Jr., Albert J, Bichon, Barron J
Format Patent
LanguageEnglish
Published 21.04.2020
Subjects
CLADDING OR PLATING BY SOLDERING OR WELDING
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MACHINE TOOLS
MEASURING
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
PHYSICS
SOLDERING OR UNSOLDERING
TESTING
TRANSPORTING
WELDING
WORKING BY LASER BEAM
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Summary:Methods of testing the material of a metal object made by additive manufacturing. An electromagnetic acoustic transducer (EMAT) is used to transmit long duration acoustic signals into the object, and to receive response signals representing resonance of acoustic waves within the material. At least one resonance peak is identified and used to determine attenuation and/or wave velocity. These values can then be used to determine material properties, such as porosity, Shear Modulus, Young's Modulus, or Poisson's Ratio.
Bibliography:Application Number: US201815962903