Description: The results of an interlaboratory correlation experiment involving eight laboratory sites studying the ion irradiation of molybdenum are presented. The program was comprised of three parts. The first part compared the radiation damage produced in a reference specimen of molybdenum by ions of different masses and different energies. The second part of the program compared measurements on a common micrograph supplied to all participants in the program. The results from all the sites agreed very well. The value of standard deviation in the measurement of void volume fraction corresponded to 10 percent of the average measured value and the spread between highest and lowest reported value was 35 percent. The third part of the program compared the microstructural characteristics of a transmission electron microscope (TEM) specimen that was passed from site to site (''round robin''). The results of this part of the experiment showed greater variations from the different participants than the results from the common micrograph. One of the principal sources of discrepancy was the measurement of the foil thickness which was necessary for computation of void number density. The standard deviation in the measurements of void volume fraction (swelling) corresponded to 20 percent of the measured average value. The spread between the highest and lowest value was 70 percent. This latter value gives an idea of the conceivable differences in results due to experimental techniques between two experiments.
Date: April 1, 1977
Creator: Brimhall, J.L. (comp.)
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Partner: UNT Libraries Government Documents Department