By using an extensive range of data on metals, ceramics and silicates, it was demonstrated that power-law dislocation creep changed to Harper-Dorn creep at the Peierls stress of the crystal. This transition was suggested to be induced by a dislocation density which depended upon the applied stress during power-law creep, but was governed by the Peierls stress in the case of Harper-Dorn creep.

J.N.Wang, T.G.Nieh: Acta Metallurgica et Materialia, 1995, 43[4], 1415-9