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Which limit arises when hydrogen embrittlement occurs in pipelines?

A)Reduced yield tensile strength.
B)Increased plastic deformation ability.
C)Enhanced weld fracture resistance.
D)Improved corrosion resistance.

💡 Explanation

Hydrogen embrittlement introduces hydrogen atoms into the metal lattice, causing **decohesion** which inhibits dislocation movement, degrading the material. Therefore, tensile strength decreases drastically, rather than plastic deformation increases, because it allows for crack initiation at lower stress.

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