Evolution of [Fe/H] with time for 1.2 M_⊙ (top panel) and 1.4 M_⊙ (bottom panel) at different initial chemical compositions. The solid lines represent models including atomic diffusion (without radiative accelerations) and the parametrisation of D_T, Fe presented in Sect. 4.2, and the dot-dashed lines represent models including atomic diffusion with radiative accelerations and the D_T, VSA19 calibrated by VSA19.