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On the Interaction between a Screw Dislocation and Point Defects in B.C.C. Transition Metals
Author(s) -
MasudaJindo K.
Publication year - 1985
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221290217
Subject(s) - impurity , transition metal , materials science , dislocation , hardening (computing) , crystallographic defect , crystallography , solid solution strengthening , binding energy , condensed matter physics , metal , transition point , solid solution , chemical physics , chemistry , nanotechnology , metallurgy , thermodynamics , atomic physics , physics , biochemistry , organic chemistry , layer (electronics) , catalysis
The interaction energy E int between a (1/2) 〈111〉 screw dislocation and point defects (both substitutional solutes and vacancies) in b.c.c. transition metals is investigated using a tight‐binding electronic theory. It is shown that the “chemical interaction” (d‐band energy contribution) plays a central role in determining the E int values for the substitutional solutes in b.c.c. transition metals. The solid solution hardening of the dilute b.c.c. transition metal alloys is also discussed in the light of the present electronic theory; particular attention is paid to the solid solution hardening due to the transition metal impurities and due to sp impurities (such as Al, Si, Ge and Be) in α‐Fe.