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In this work, dislocation interactions are directly observed and analyzed by using in-situ transmission electron microscope during heating processes in a pre-deformed Mg-3Al-1Zn magnesium alloy. Thermodynamic behaviors of two types of dislocations are investigated, i.e., individual dislocations and low-angle grain boundary arranged by dislocations. The results show that the low-angle grain boundary remains stable as the heating temperature increases to 673 K, while most of the individual dislocations disappear until the heating temperature reaches 473 K. Furthermore, the low-angle grain boundary tends to absorb individual dislocations nearby. The stability and the annihilation of both types of dislocations are discussed.

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This is an author-produced, peer-reviewed version of this article. © 2022, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International license. The final, definitive version of this document can be found online at Materialia,

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