Al and Si Influences on Hydrogen Embrittlement of Carbide-Free Bainitic Steel

Table 4

Calculated binding energy of unit cells, eV.

	Fe2	Fe2H		FeSi	FeSiH		FeAl	FeAlH
		T	O		T	O		T	O
𝐸𝑏 (eV)	5.44	4.693	4.712	6.06	4.604	4.538	4.95	4.312	4.223
Δ%^a	—	13.75%	13.40%	—	24.01%	25.09%	—	12.83%	14.63%

^aΔ%=[𝐸(Fe_𝑛XH)−𝐸(Fe_𝑛X)]/𝐸(Fe_𝑛X)×100%.