Gaseous Environmental Effects on Fatigue Crack Growth.
TEXAS UNIV AT AUSTIN DEPT OF MECHANICAL ENGINEERING
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The introduction of gaseous environments such as humid air, hydrogen and oxygen, and mixtures of gases strongly influences the fatigue crack growth rate of structural alloys. The observed changes in fatigue crack growth rate are discussed in relation to dislocation impurity transport and the crack closure concept. Significant changes in the plastic behavior near the crack tip are described and related to the fatigue crack growth behavior. A wide range of experiments aimed at evaluating the overall interaction between the gaseous environment and the propagating fatigue crack are described. Author
- Metallurgy and Metallography