Accession Number : AD0780231

Title :   Measurement of Elastic Moduli of Materials at Elevated Temperature.

Descriptive Note : Final rept.,

Corporate Author : PANAMETRICS INC WALTHAM MASS

Personal Author(s) : Carey,C. A. ; Carnevale,E. H. ; Chen,J. ; Fowler,K. A. ; Larson,G. S.

Report Date : 31 MAY 1974

Pagination or Media Count : 570

Abstract : Ultrasonic measurement of elastic properties of solids at elevated temperature comprises the central theme in the report of some twelve years of R and D under the support of the ONR Acoustics Branch. The principal methods used were momentary contact with pressure coupling, for bulk specimens of cross-sectional dimensions large compared to wavelength, and continuous contact, with welded joints, for wires and rods of cross-sectional dimensions small compared to wavelength. The bulk specimens were tested with broadband pulses or rf bursts having frequencies typically above 1 MHz. The wires were tested with pulses having 0.1 MHz as a typical center frequency. Other topics include: transducers, velocimetry, spectrum analysis, infrasonic measurements of moduli in plastic tensile test specimens, measurement of polymerization, and applications of ultrasonics such as nondestructive testing, acoustic emission, thermometry, flowmetry and process control. (Modified author abstract)

Descriptors :   *Nondestructive testing, *Ultrasonic tests, *Modulus of elasticity, Ultrasonic radiation, Acoustic attenuation, High temperature

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE