Abstract
NIOBIUM is known to twin at 77° K, and for the purest reported1 the estimated lower yield stress was ∼40 kg mm−2 and the maximum tensile stress only a little higher. For specimens of this purity the lower yield stress at room temperature was ∼7 kg mm−2.
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References
Leadbetter, M. J., and Argent, B. B., J. Less Common Met., 3, 19 (1960).
Evans, P. R. V., J. Less Common Met., 4, 78 (1962).
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FOURDEUX, A., WRONSKI, A. Twinning at 77° K of ‘Flash-annealed’ Niobium. Nature 199, 1284–1285 (1963). https://doi.org/10.1038/1991284b0
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DOI: https://doi.org/10.1038/1991284b0
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