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Microstructural Parameters in the Theory of Critical Distances

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Abstract:

The work described below investigates, for the first time, the link between microstructural parameters such as grain size and the length constant L which is known as the critical distance. L is frequently used in the prediction of failure processes such as brittle fracture and fatigue, initiated at stress concentration features such as notches. Values of L were calculated using data from the literature on the effect of short cracks and notches in steels and ceramics. In some cases, simple relationships could be established between L and the grain size, or other microstructural features. Sometimes L was found to be much larger than anything in the microstructure and appeared to be related to the size of the damage zone at failure.

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Periodical:

Materials Science Forum (Volumes 567-568)

Pages:

23-28

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.567-568.23

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Online since:

December 2007

Authors:

David Taylor

Keywords:

Critical Distance, Damage Zone, Fracture, Grain Size, Microstructure

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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References

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