首页|Interaction between <c> dislocation loop and {101¯2} twin boundary in magnesium

Interaction between <c> dislocation loop and {101¯2} twin boundary in magnesium

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© 2021 Elsevier B.V.In this work, molecular dynamics simulations were employed to investigate the interaction between a {101¯2} twin boundary (TB) and irradiation-induced <c> 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[202¯3]+1/6[2¯023], 1/6[22¯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 <a> 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.

<c> dislocation loopirradiation-induced defectsMagnesiummolecular dynamics simulationstwin boundary

Fan H.、Tang J.、Xu C.、Li Z.、Tian X.、Jiang W.、Wang Q.

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Department of Mechanics Sichuan University

2022

10.1016/j.jnucmat.2021.153495

Journal of Nuclear Materials

Journal of Nuclear Materials

EISCI
ISSN：0022-3115
年,卷(期)：2022.560
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