Which risk increases due to hydrogen embrittlement following incorrect weld cooling procedures on high-strength steel structures?

💡 Explanation

When incorrect weld cooling occurs, hydrogen embrittlement occurs. Atomic hydrogen diffuses into the steel’s microstructure, accumulating at grain boundaries because of rapid cooling, leading to internal stresses that precipitate delayed cracking, particularly in the heat-affected zone. Therefore, delayed cracking results rather than increased tensile strength, reduced fatigue resistance, or controlled phase transformations which necessitate distinct thermal and chemical conditions.

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