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← ScienceWhich consequence results when hydrogen embrittlement exceeds critical stress?
A)Ductile fracture propagates rapidly✓
B)Grain boundary cohesion decreases
C)Oxide layer formation accelerates
D)Material's hardness temporarily increases
💡 Explanation
Rapid ductile fracture occurs because hydrogen embrittlement introduces flaws into the metal lattice structure. This weakens the material, reducing its ability to withstand applied stress, therefore fracture propagates rather than exhibiting crack arrest mechanisms.
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