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A coupled fully kinetic hydrogen transport and ductile phase-field fracture framework for modeling hydrogen embrittlement
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DOI：10.1016/j.ijplas.2026.104765.png)
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Abstract
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• New triaxiality-dependent ductile driving force for geometric phase-field fracture. • Transient segregation at dislocations resolved the kinetics of hydrogen embrittlement. • Dislocation-driven hydrogen segregation explains surface cracking at necking region. • Slow rates eliminate concentration gradients, shifting cracking from surface to core. • CT samples showed shift from ductile tearing to hydrogen embrittled fracture.
Keywords:
Strain rate
Ductile to brittle transition
Dislocation density
Chemo-mechanics
FEM
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