Abstract
A 20 pet Zn-AI alloy fractured in an intercrystalline manner both in creep tests at 500°F and tensile tests at room temperature. The fracture surfaces were studied both by microscopy and X-rays. The intercrystalline fracture surfaces are not smooth but are made up of fracture facets. These fracture structures are dependent on the orientation of the grain boundary with respect to the tension axis and are also influenced by the proximity of other grain boundaries. A layer of material, either heavily cold worked or recrystallized, was invariably created in regions immediately adjacent to the fracture surface. A mechanism for the occurrence of these surface structures is proposed.
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H. C. CHANG, Associate Member AIME, formerly on the Research Staff, Massachusetts Institute of Technology
TP 4312E. Manuscript, Sept. 29, 1955. Cleveland Meeting, October 1956.
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Chang, H.C., Grant, N.J. Some Observations on the Structure of Grain Boundary Fracture Surfaces. JOM 8, 1241–1247 (1956). https://doi.org/10.1007/BF03377858
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DOI: https://doi.org/10.1007/BF03377858