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Atomic Short‐Range Order in Cu17 at% Mn
Author(s) -
Roelofs H.,
Schönfeld B.,
Kostorz G.,
Büher W.
Publication year - 1995
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.2221870103
Subject(s) - copper , reciprocal lattice , monte carlo method , scattering , short range order , neutron scattering , planar , materials science , range (aeronautics) , condensed matter physics , reverse monte carlo , chemistry , atomic physics , crystallography , neutron diffraction , diffraction , physics , crystal structure , optics , mathematics , metallurgy , statistics , computer science , composite material , computer graphics (images)
The elastic diffuse neutron scattering from a Cu–17.2 at% Mn single crystal aged at 483 K to produce an equilibrium state of atomic short‐range order is measured at room temperature in a minimum separation volume of reciprocal space. Warren‐Cowley short‐range order parameters and coefficients of linear static displacement scattering are determined by least‐squares fitting. Effective pair potentials obtained from the short‐range order parameters by applying the inverse Monte‐Carlo method are used to calculate the diffuse antiphase boundary energy γ APB . For copper‐base alloys the concentration dependence of γ APB is one of the suggested reasons for the transition of wavy to planar slip. Based on the values of γ APB , the concentration ranges for the transition in Cu Mn, Cu Al, and Cu Zn may be understood.