Вид документа : Статья из журнала Шифр издания : 54/M 46 Автор(ы) : Medvedeva N. I., Gornostyrev Yu. N., Freeman A. J. Заглавие : Solid solution softening and hardening in the group-V and group-VI bcc. transition metals alloys: First principles calculations and atomistic modeling Место публикации : Physical Review B: Condensed Matter and Materials Physics. - 2007. - Vol. 76, № 21. - С. 212104/1-212104/4 Примечания : Библиогр. : с. 212104/4 (31 назв.) ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): сплавы--переходные металлы--первопринципные зонные расчеты--твердые растворы Аннотация: The interaction of d transition metal additions with dislocations was studied in bcc alloys by using the atomic row model with ab initio parametrization of the interatomic interactions. Opposite trends were obtained for the solute-dislocation interactions in the group-V (Nb, Ta) and group-VI (Mo, W) bcc metals: while additions with extra valence electrons enhance the double-kink nucleation and result in solid solution softening in the group-VI metals, they cannot cause the intrinsic softening in the group-V metals. Oppositely, additions with fewer valence electrons should lead to an intrinsic softening in the group-V metals and a strong hardening in the group-VI metals. The effect of electronic concentration on the solute-dislocation interaction is less pronounced in the group-V alloys, and other mechanisms may be dominant in their softening and hardening behavior Держатели документа: Центральная научная библиотека УрО РАН Доп.точки доступа: Gornostyrev, Yu. N.; Freeman, A. J.; Медведева Надежда Ивановна