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[Display omitted] Magnesium is a lightweight structural metal and has important applications. However, the dislocation plasticity of magnesium was not well studied, especially the pyramidal dislocations. In this paper, molecular dynamics (MD) simulations were performed to systematically investigate the dislocation interactions, i.e. between dislocations, between dislocations, between and dislocations, as well as between and dislocations. Various new interaction products were observed and analyzed. The current work provides new insights into the dislocation plasticity for understanding the mechanical property of magnesium and its alloys. [ABSTRACT FROM AUTHOR]

In this work, molecular dynamics simulations were employed to investigate the interaction between a { 10 1 ¯ 2 } twin boundary (TB) and irradiation-induced dislocation loops in magnesium at room temperature. According to the geometry of the Burgers vectors with respect to TB, three sets of partial Burgers vectors can be identified, i.e. 1 / 6 [ 20 2 ¯ 3 ] + 1 / 6 [ 2 ¯ 023 ] , 1 / 6 [ 2 2 ¯ 03 ] + 1 / 6 [ 2 ¯ 203 ] and 1 / 2 [ 0001 ] + 1 / 2 [ 0001 ] , which cover all the possible interaction styles between < c > dislocation loop and TB. The simulation results show that, although the partial Burgers vectors are different, the TB is able to always transform all the dislocation loops into glissile dislocation loops in the twin. Therefore, an elimination mechanism of the irradiation-induced defects can be proposed in magnesium, i.e. by interaction with TB. The current work provides new insights into understanding the irradiation effects in magnesium and other hexagonal close-packed metals. [ABSTRACT FROM AUTHOR]