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CHG is very different compared to other graphite degenerations or defects;
Filigree, multi-branched string-like, 3d interconnected structure;
Morphology and volumetric amount of CHG cannot be accessed by stereological interpretation of 2d section data;
Field-tested, technically established method to quantify CHG in components not available;
Fatigue: CHG causes substantial reduction in fatigue limit and significant increase in crack growth rate;
Therefore: Avoid or exclude CHG!