THE USE OF STRAIN SOFTENING TO IMPROVE THE PROPERTIES OF REFRACTORY METALS.
Quarterly progress rept. no. 1, 1 Dec 6329 Feb 64,
MATERIALS RESEARCH LAB INC RICHTON PARK ILL
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Effort was directed toward obtaining a better understanding of the mechanics of the MRL flexing machine, and toward improving the reliability and repeatability of experiments. The roller-flexer was stiffened accuracy of the gap setting was improved tensil loads during flexing were recorded as a function of travel surface strains as measured by curvature and thickness strains were recorded after each pass and, temperature control during specimen testing was improved. Molybdenum - 0.5 Ti Alloy 0.005 in. thick was flexed at room temperature. Tensile loads were equalized insofar as possible for both directions of travel. Repeatability of test procedure is indicated, but the influence of this on properties of the flexed material has not been ascertained. Author