MAGNETOSTRICTION TRANSDUCERS OF ACOUSTIC EMISSION, IMPULSE, VIBRATION, AND NOISE ANALYSIS

MAGNETOSTRICTIVE TRANSDUCERS OFFER AN ALTERNATIVE TO PIEZOELECTRIC TRANSDUCERS FOR USE IN ACOUSTIC EMISSION, VIBRATION, AND NOISE ANALYSIS. THEY ARE FINDING WIDER USE IN ULTRASONIC MEASUREMENT OF ELASTIC MODULI AND TEMPERATURE, AND AS COMPONENTS IN AN ACOUSTIC EMISSION SIMULATION TEST SET. MAGNETOSTRUCTIVE MATERIALS INCLUDE NICKEL AND NICKEL ALLOYS (E.G. PERMENDUR, REMENDUR, ELINVAR). SUCH MATERIALS MAY BE PREFERRED TO PIEZOELECTRIC IN CASES (1) WHERE HIGH TEMPERATURE OR NUCLEAR RADIATION OR BOTH ARE PRESENT, (2) WHERE REMOTE SENSING IS REQUIRED, (3) WHERE THE PART TO BE MONITORED IS ROTATING. MAGNETOSTRICTION TRANSDUCERS RESPOND TO FREQUENCIES UP TO APPROXIMATELY MHZ. BANDWIDTH IS CONTROLLED THROUGH CHOICE OF GEOMETRY. MECHANICALLY, MAGNETOSTRICTIVE METALS ARE MUCH MORE RUGGED THAN PIEZOELECTRIC CERAMICS. /AUTHOR/

• Supplemental Notes:
  • Vol 11, No 3, PP 33-35, 3 FIG, 8 REF
• Authors:
  • Lynnworth, L C
  • Bradshaw, J E
• Publication Date: 1971-3

Media Info

• Serial:
  • Materials Research and Standards
  • Publisher: American Society for Testing and Materials (ASTM)

Subject/Index Terms

• TRT Terms: Acoustics; Emissivity; Measurement; Modulus of elasticity; Noise; Nondestructive tests; Piezoelectricity; Temperature measurement; Transducers; Ultrasonic tests; Vibration
• Old TRIS Terms: Magnetorstriction transducers; Piezoelectric effects
• Subject Areas: Environment; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00217099
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 22 1971 12:00AM