Evaluation and prediction of fatigue resistance of metals from the kinetics of variation in surface properties |
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Authors: | A V Zheldubovskii A D Pogrebnyak V V Kasperskaya |
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Institution: | (1) S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, Kyiv, Ukraine |
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Abstract: | The paper studies the fatigue resistance of metallic samples subjected to high-cycle loading and microhardness measurement.
The fatigue damage of materials during loading is identified as decrease in the thickness of the barrier surface layer, which
prevents fatigue failure. It is shown that the thickness of this layer is independent of the plastic characteristics of the
material and the level of stress. A method to evaluate accumulated fatigue damage is developed. Kinetic curves of damage accumulation
are analyzed. Methods to predict fatigue characteristics are proposed
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Translated from Prikladnaya Mekhanika, Vol. 44, No. 3, pp. 86–95, March 2008. |
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Keywords: | high-cycle loading fatigue strength microhardness damage accumulation surface layer barrier layer |
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