|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Magnesium Technology 2021
||Interactions of a basal edge dislocation with vacancies and interstitials in magnesium
||Defei Li, Jing Tang, Zikun Li, Xiaobao Tian, Yan Li, Haidong Fan
|On-Site Speaker (Planned)
As the lightest structural metal, magnesium (Mg) and its alloys have an important application on aircrafts, and would work under an irradiation condition, i.e. in outer space. So it is significant to study the microstructure and mechanical property of irradiated magnesium. In this work, we performed molecular dynamics simulations on the interactions of basal edge <a> dislocations with interstitials and vacancies. We found that both point defects have a blocking effect on dislocation motion. However, the blocking effect of interstitials is much stronger than that of vacancies. This is due to the different interaction types. The interstitials are absorbed by the basal dislocation, so the stronger blocking effect is a result of the short-range interaction, while the weaker blocking effect of vacancies is induced by the long-range interaction only since vacancies cannot be absorbed. Current work is useful for understanding the irradiation effects in magnesium and its alloys.
||Magnesium, Computational Materials Science & Engineering, Mechanical Properties