Accurate methods and an efficient workflow for computing and documenting dislocation core energies are developed and applied to $\frac{1}{2}\langle 111\rangle$ and $\langle 100\rangle$ dislocations in five body-centered cubic (bcc) metals W, Ta, V, Mo, and $\alpha$-Fe represented by 13 model interatomic potentials. For each dislocation type, dislocation core energies are extracted for a large number of dislocation characters thoroughly sampling the entire 2-space of crystallographic line orientations of the bcc lattice. Of particular interest, core energies of the $\frac{1}{2}\langle 111\rangle \left\{110\right\}$ dislocations are found to be distinctly asymmetric with respect to the sign of the character angle, whereas core energies of $\langle 100\rangle \left\{110\right\}$ junction dislocations exhibit marked cusps for line orientations vicinal to the closed-packed $\langle 111\rangle$ directions. Our findings furnish substantial insights for developing accurate models of dislocation core energies employed in mesoscale dislocation dynamics simulations of crystal plasticity.

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• Crystal defects
• Disclinations & dislocations
• Plasticity
• Molecular dynamics
• Multiscale modeling