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RESEARCH PAPERS

A Dynamic Measuring Technique for Bulk Stiffness Constants as a Function of Temperature and Microstructure for U-6 wt pct Nb

[+] Author and Article Information
D. R. Lowry, A. Wolfenden, G. M. Ludtka

Mechanical Engineering Department, Texas A&M University, College Station, TX 77843-3123

J. Appl. Mech 57(2), 292-297 (Jun 01, 1990) (6 pages) doi:10.1115/1.2891988 History: Received April 25, 1988; Revised July 01, 1989; Online March 31, 2008

Abstract

Measurements of dynamic Young’s modulus (E) and shear modulus (G) have been made with the piezoelectric ultrasonic composite oscillator technique (PUCOT) on gamma solution heat treated specimens of U-6 wt pct Nb at 80 and 40 kHz, respectively. Three aging conditions were employed to permit measurements for four different microstructures from ambient to 647°C. Values of Poisson’s ratio (ν) were calculated from the measured values of E and G. The extreme ranges for E, G and ν extended from 171 to 55 GPa, from 66 to 17 GPa, and from 0.09 to 0.70, respectively.

Copyright © 1990 by The American Society of Mechanical Engineers
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