Impact fatigue of an alumina ceramic |
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Authors: | B. K. Sarkar T. G. J. Glinn |
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Affiliation: | (1) Department of Metallurgy and Materials Technology, University of Surrey, Guildford, UK |
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Abstract: | A new type of pendulum impact apparatus is described for determining single and repeated impact strength of ceramics, It has been demonstrated that specimens of a Sintox alumina ceramic exhibit fatigue behaviour, having a high stress plateau followed by progressively increasing endurance with decrease in applied impact energy. A fatigue limit, at least from the engineering view point, has been drawn at high endurances (105 impacts). The influence of environment (static fatigue) and/or plastic deformation to explain the fatigue behaviour is suggested. |
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