September 10, 2025MaterialsOpen Access

Effect of Copper Alloying on Hydrogen Embrittlement of Fe-28Mn-10Al-1C Austenitic Low-Density Steel

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Copper alloying reduced the hydrogen embrittlement index from 21.3% to 9.6% in treated samples, demonstrating significant improvement in resistance.
Uniaxial tensile tests revealed the embrittlement mechanisms shifted from brittle-ductile to fully ductile with copper addition, enhancing material performance.
Thermal desorption spectroscopy indicated copper had a negligible effect on reversible hydrogen trap activation energy, suggesting similar trap types.
Specimens treated with copper exhibited lower reversible hydrogen content, with LZ-3Cu and TH-3Cu showing decreases of 0.1 wt.ppm and 0.2 wt.ppm, respectively.

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Observational analysis shows copper alloying mitigates hydrogen embrittlement in austenitic steels, indicating enhanced resistance.

Gu et al. (2025) studied this question.

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