The effect of solute interaction and anisotropic elasticity on Shockley partial dislocations in an F.C.C. alloy

Dissociated defects and isolated Shockley partial dislocations are studied in a copper 15.8 at% aluminum alloy using principally the weak‐beam technique of electron microscopy. It is shown that, as expected, the closer a partial dislocation is to the edge orientation the more wavy it is likely to appear. This result is predicted by both, isotropic and anisotropic elasticity theory and can also be caused by the presence of solute pinning in this alloy. It is concluded that no definite evidence has yet been obtained for the predicted instability of edge Shockley partial dislocations in this material. Copyright © 1980 WILEY‐VCH Verlag GmbH & Co. KGaA