Ultrasonic Time-of-Flight Measurements on Binary U-6Nb Cubes

Souza, P R

Lawrence Livermore National Laboratory

关键词: Alloys;    Thickness;    Acoustics;    36 Materials Science;    Elasticity;   

DOI  :  10.2172/15016861
RP-ID  :  UCRL-TR-213367
RP-ID  :  W-7405-ENG-48
RP-ID  :  15016861

美国|英语

来源: UNT Digital Library

【 摘 要 】

I performed contact ultrasonic time-of-flight measurements on three binary U-6 wt-% Nb alloy (U-6Nb) cubes. Using the time-of-flight measurement results, thickness, and density, the Acoustic Velocity, Poisson's Ratio, Shear Modulus, and Modulus of Elasticity are calculated. A detailed data is summarized in the spreadsheets 1-6. The calculated data compares the material properties of each cube before and after a heat treatment (HT). The time-of-flight measurements were performed using the pulse/echo signal overlap technique discussed in the Review of Ultrasonic Pulse/Echo Signal Overlap Technique section of this report. The measurements were made using both the longitudinal and shear ultrasonic modes and acquired in the X, Y, and Z axes of each cube, as represented in Figure 1. Thickness and density measurements on the three cubes were performed by the Manufacturing and Materials Engineering Division, Dimensional Inspection Group. The HT was performed on all three cubes in the Manufacturing and Materials Engineering Division, Heat Treat Shop. The process consisted of 200 C for 2 hours in a vacuum furnace, followed by an argon purge to 25 C.