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Abstract
High strength twinning induced plasticity (TWIP) steels have potential for applications in the automotive industry. However, they are prone to hydrogen embrittlement (HE) and galvanic corrosion. Here, we report on the susceptibility towards HE and oxidation of a model Fe 27Mn 0.3C (wt%) TWIP steel by atom probe tomography. We measured the segregation of hydrogen and oxygen at grain boundaries, which appears correlated with manganese depletion. Our study suggests a correlation between HE and oxidation mechanisms in TWIP steels, which can combine to favor the previously reported hydrogen enhanced decohesion of grain boundaries.
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