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Which outcome occurs when atomic hydrogen contacts stainless steel?

A)Hydrogen embrittlement reduces fracture toughness
B)Passivation layer enhances corrosion resistance
C)Austenite phase transformation strengthens steel
D)Carbide precipitation improves high temperature hardness

💡 Explanation

Hydrogen embrittlement occurs because adsorbed atomic hydrogen diffuses into the steel lattice, weakening grain boundaries rather than strengthening the metal. This reduces fracture toughness because of the diffusion mechanism; therefore embrittlement rather than the other strengthening processes becomes dominant.

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