Non-contact ultrasonic spectroscopy measurement of elastic constants and ultrasonic attenuation

Conference · Tue Jan 01 00:00:00 EST 1991

OSTI ID:6111415

Schwarz, R B; Kuokkala, V T; Srinivasan, S; Visscher, W M

We have developed an ultrasonic spectroscopy method for measuring the elastic constants of solids in hostile environments and over a broad temperature regime. The sample is cut as a rectangular parallelepiped, approximately 1 mm{sup 3} in volume. One or two of the sample surfaces are coated with a thin film of a magnetostrictive material such as nickel. The sample is placed coaxially with two solenoids. One solenoid is used to generate an AC magnetic field of small amplitude which stretches the films. By sweeping the frequency of this field, the sample is excited successively into its various mechanical resonance modes. The second solenoid detects the mechanical resonances. The elastic constants are then deduced from the spectrum of mechanical resonances measured at constant temperature. The internal friction is deduced from the width of the resonance peaks. Because the technique is strictly non-contact (the sample may be encapsulated in a fused silica tube), it is deal for measuring elastic constants in hostile environments or under controlled atmospheres. In its present version the system allows us to measure the elastic constants and ultrasonic attenuation of a given sample between 80 and 100 K. The operation of the system is exemplified by measurements on amorphous Ni{sub 80}P{sub 20} and crystalline Ti{sub 60}Cr{sub 40}. 17 refs., 6 figs.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6111415
• Report Number(s): LA-UR-91-3675; CONF-911176-3; ON: DE92003786
• Resource Relation: Conference: 28. annual meeting of the Society of Engineering Science, Inc., Gainesville, FL (United States), 6-8 Nov 1991
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
36 MATERIALS SCIENCE
SOLIDS
ELASTICITY
SPECTROSCOPY
ATTENUATION
CHROMIUM ALLOYS
INTERNAL FRICTION
MAGNETOSTRICTION
SOLENOIDS
TITANIUM BASE ALLOYS
ULTRASONIC WAVES
ALLOYS
ELECTRIC COILS
ELECTRICAL EQUIPMENT
EQUIPMENT
FRICTION
MAGNETIC PROPERTIES
MECHANICAL PROPERTIES
PHYSICAL PROPERTIES
SOUND WAVES
TENSILE PROPERTIES
TITANIUM ALLOYS
420500* - Engineering- Materials Testing
360103 - Metals & Alloys- Mechanical Properties