Measurement of Elastic Moduli of Materials at Elevated Temperature.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 31, 1974
- Accession Number
- AD0780231
Entities
People
- C. A. Carey
- E. H. Carnevale
- G. S. Larson
- Jiayu Chen
- K. A. Fowler