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Synergistic effects of crystallographic orientation and twinning-mediated grain refinement on internal crack initiation in defect-free Hastelloy C-276 under very high cycle fatigue
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DOI：10.1016/j.ijfatigue.2026.109885.png)
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Abstract
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• Explains FGA formation mechanisms within a defect-free nickel-alloy matrix. • Deformation twins promote grain fragmentation but structurally confine FGA growth. • Synergistic interaction of {111} slip and boundaries drives crack initiation. • Facet inclination and crystallographic orientation correlate with fatigue life.
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