Shear strength of Al-Cu alloys with different types of hardening precipitates: molecular dynamics and continuum modeling

Abstract

Molecular dynamics is used to study the motion of dislocations in aluminum containing hardening copper precipitates. The interaction between a dislocation and four experimentally observed types of precipitates is considered. The energy of dislocation segments attached to hardening phases is determined and used as a parameter in the continuum model of dislocation-precipitate interaction