Abstract
Microscopic observations during creep tests were made on Al-20 pct Zn, 80 pct Ni-20 pct Cr, and 2S and 3S aluminum specimens. All these materials failed in an intercrystalline manner under certain stress and temperature conditions. Particular attention was given to the initiation and propagation of intercrystalline cracks in coarsegrained Al-20 pct Zn specimens. The geometry of the grains and grain boundaries in these specimens was known before the tests. On the basis of the observations and a knowledge of the interaction between grains and grain boundaries, a mechanism of intercrystalline fracture and propagation of the fracture has been proposed.
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TP 4151E. Manuscript, Apr. 19, 1955. New York Meeting, February 1956.
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Chang, H.C., Grant, N.J. Mechanism of Intercrystalline Fracture. JOM 8, 544–551 (1956). https://doi.org/10.1007/BF03377725
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DOI: https://doi.org/10.1007/BF03377725