Electronic theory for screw dislocation motion in dilute b.c.c. transition metal alloys
- 1 October 1981
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 44 (4) , 799-814
- https://doi.org/10.1080/01418618108239549
Abstract
Screw dislocation motion in dilute b.c.c. transition metal alloys has been investigated using a tight-binding type electronic theory coupled to the moments approach. The repulsive cort—core interaction energies are simulated by a Born—Mayer potential. Assuming existence of solute enriched clusters (SEC), the Peierls stress of the dilute alloys is calculated and compared with the available experimental data, in relation to the alloy softening. It is found that the Peierls stress of the SEC could be reduced significantly compared with that of the solvent (α-Fe) metal, provided that diagonal disorder due to alloy (SEC) formation is sufficiently large.Keywords
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