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It has been shown that the notch sensitivity of unalloyed titanium as determined in the notch tension test differs from that measured in the Charpy V-notch impact test. The ductile-brittle transition in the notch tension test occurs at a much lower testing temperature than does that for the impact test.
At a testing temperature of −100 F (−73 C) neither 0.26 per cent carbon nor 0.23 per cent nitrogen leads to embrittlement in unalloyed titanium as determined in the notch tension test.
Klier, E P
Professor of Metallurgy, Syracuse University, Syracuse, N. Y.
Feola, N J
Assistant Project Engineer, Curtiss-Wright Corp., Buffalo, N. Y.