The line tension of ½<110] screw dislocations on cross-slip planes was calculated for the γ phase. The results showed that the line tension was highly anisotropic on the cross-slip planes, with a maximum on the (001) plane and a minimum on {110} planes. The line tension on the primary glide plane, {111}, was intermediate. Three sets of elastic constants were used to calculate the line tension. The ratio of the maximum to the minimum line tensions ranged from 2.19 to 2.84. Screw ½<110] dislocations did not possess a negative line tension, thus ruling out the possibility of cross-slip caused by elastic instability.

Anisotropic Line Tension of ½<110] Screw Dislocations on Cross-Slip Planes in γ-TiAl. Y.Q.Sun: Philosophical Magazine Letters, 1999, 79[8], 539-44