Evolution of β-Nb precipitates during hydrogenation of a zirconium-niobium alloy

We firstly reported that during hydrogenation of Zr-Nb alloy, β-Nb particles transformed into rods with their major axes parallel to each other within neighboring ε-ZrH2 grains, while obeying orientation relationship with the matrix: [101] ZrH2 // [1¯13] β-Nb. Parallel Moiré fringes were observed viewing along [101] ZrH2 due to the low mismatch angle between (101) ZrH2 and (101¯) β-Nb.