Stable networks containing two pieswise dislocation arrays

Many observations of networks of piecewise arrays of dislocations are known in many metals after plastic deformation, creep and after annealing. The Frank Bilby equation identifies a small group of low energy networks of two dislocation arrays. The stability of all possible networks comprising of two infinite piecewise arrays of glide dislocations in FCC metals is investigated in the framework of the linear elasticity theory of dislocations. This analysis adds a few additional stable networks to the networks identified by Frank-Bilby equation. These new stable configurations are described and the cause for their stability is discussed.