Abstract
Internal friction characteristics and temperature dependence of the torsion modulus for iodide zirconium containing 2.4 pet Hf were investigated, using a low frequency pendulum technique. The internal friction curve consists of a background which in-creases as the temperature increases, a maximum at 860°C apparently due to the al-lotropie transformation, a maximum due to grain boundary relaxation with an associated heat of activation of 58,000 cai per mol, and an anomaly below 350°C which may be associated with a precipitation phenomenon. Oxygen in small amounts reduces the grain boundary maximum substantially. The variation of the torsion modulus at 20°C was found to be 3450 Kg per mm2 for the zirconium used in the present work.
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W. J. Bratina, formerly associated with Dept. of Metallurgical Engineering, University of Toronto, Toronto.
Discussion of this paper, TP 4082E, may be sent, 2 copies, to AIME by Apr. 1, 1956. Manuscript, Feb. 18, 1955. Philadelphia Meeting, October 1955.
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Bratina, W.J., Winegard, W.C. Internal Friction in Zirconium. JOM 8, 186–189 (1956). https://doi.org/10.1007/BF03377671
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DOI: https://doi.org/10.1007/BF03377671