What does hydrogen embrittlement lead to in metals?

Hydrogen embrittlement is a phenomenon that significantly affects the mechanical properties of metals, particularly those that are high-strength. When hydrogen atoms are absorbed into the metal, they can lead to the formation of microvoids or cracks within the material. This process compromises the metal's internal structure, resulting in a reduction of tensile strength and ductility. As the metal becomes weaker, its ability to deform without fracturing decreases, which is particularly detrimental in applications where mechanical stress is present.

This understanding is crucial for materials engineers and those involved in metallurgy, as it informs practices around handling and treating metals that may come into contact with hydrogen. The other options do not accurately reflect the consequences of hydrogen embrittlement, as this phenomenon specifically leads to detrimental effects rather than improvements in strength or corrosion resistance.