{211}-Slip and Deformation Twinning in 50Fe–50Cr Alloys

Abstract

The evidence for slip on {211} planes over mesoscopic distances recently obtained on disordered b.c.c. 50Fe–50Cr alloys by Kako, Isozaki, Takaki, and Abiko is interpreted in terms of a low specific energy for stacking faults on {211} planes and is related to the formation of coherent twins with {211} composition planes during plastic deformation at quite high temperatures. It is pointed out that one of the configurations of the a0〈111〉/2 screw dislocations considered by Sleeswyk is able to account for both the {211}‐slip and the nucleation of twinning.

Peierls barriers, kinks, and flow stress: Recent progress

“…The`excited' states discussed in Section 5 do slip on {112} but do not have threefold rotational symmetry. When the description of these states in terms of stacking-fault ribbons on {112} is meaningful (an exception rather than the rule [130]), the splitting into partial dislocations appears to be confined to one of the {112} planes [130] and given by…”