The orientation and temperature dependence of plastic flow in potassium

Atom-based bond-order potentials for modelling mechanical properties of metals

“…In molybdenum, and probably all other transition metals, as recently argued by Frederiksen and Jacobsen [151], the core structure of 1/2[1 1 1] screw dislocations is invariant with respect to the ½1 0 1 diad. In contrast, it is likely that in alkali metals the diad non-invariant structure dominates, as found in earlier studies employing the weak pseudopotentials to describe atomic interactions [119,[156][157][158][159]. In both cases the core is non-planar and the screw dislocation is thus sessile.…”

Non-planar dislocations: 3D models and thermally-activated glide processes

“…7 are plotted the simulated energy of the lowestenergy BnApB kink-pair for Fe, together with several groups of experimental results for both Fe [22,23] and potassium [24]. Also shown in Fig.…”

“…Comparison of simulated kink-pair energies and experimental activation energies for deformation. Experimental data of potassium from [24]. Experimental data of Fe from [22,23].…”

Mechanical properties of Fe–Al–M–C (M=Ti, V, Nb, Ta) alloys with strengthening carbides and Laves phase

“…the values of yield stresses in compression are higher than those in tension. This phenomenon-the so-called tension-compression asymmetry is known in metals with bcc crystal structure [23][24][25][26]. The tension-compression asymmetry has primarily been related to the glide of the screw dislocations with nonplanar (delocalised) core structure [27,28].…”