Hydrogen embrittlement in high-entropy alloys and steels
We investigate the hydrogen behaviors in high-entropy alloys or various automotive steels to reveal the embrittlement mechanism.
We introduce the hydrogen into the materials by high-pressure gas charging or electro-chemical charging. The embrittlement is evaluated by tensile tests or immersion test after deep drawing / bending. Then, we investigate the effect of stress/strain levels, residual stress/strain field, hydrogen solubility, hydrogen diffusivity, and microstructures on the hydrogen embrittlement.