Effects of Aluminum on Hydrogen Solubility and Diffusion in Deformed Fe-Mn Alloys

Figure 3

Hydrogen solution energies for the different octahedral interstitial sites in and versus lattice constant . The different curves demonstrate the effect of aluminum on the solution energy. The latter is split into a chemical and a volumetric contribution; see main text. For all configurations the variation of the solution energy with the lattice constant is similar, as well as the volumetric contributions, whereas the chemical contributions differ significantly, indicating the strong preference of H to avoid an aluminum rich nearest neighbour environment. The vertical lines show the equilibrium lattice constants of the different configurations.