Dae Geon Lee, Ji Hoon Kim, Yeonseung Jung, Dong-Woo Suh
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Hydrogen Diffusion in Al–Si-Coating Layer of Press-Hardening Steel
We examined the hydrogen diffusion behavior in the Al–Si-coating layer which underwent the press-hardening simulation. The microstructure evolution, in particular, the type of intermetallic compounds, was revealed to have a remarkable influence on the hydrogen absorption. It was found that the formation of AlFe in the coating layer was advantageous regarding to the suppression of hydrogen penetration across the coating layer, which was originating from the lower hydrogen diffusivity compared to the Al5Fe2.
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