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논문 기본 정보

자료유형
학술저널
저자정보
Jingyu Zhai (Dalian University of Technology) Xinyuan Song (Dalian University of Technology) Anyang Xu (Dalian University of Technology) Yugang Chen (Korea Advanced Institute of Science and Technology) Qingkai Han (Dalian University of Technology)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.6
발행연도
2021.1
수록면
1,458 - 1,468 (11page)

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초록· 키워드

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In this study, the molecular dynamics method was used to study the damping mechanism in Mg alloys at the atomic scale. The energy dissipated by the nucleation and motion of dislocations and by defects friction, and the effect of defects, such asvacancies, cracks, and grain boundaries, on them were studied. The study shows that different kinds of defect have differenteffects on the dislocation damping and defect friction damping. And then, the effect of strain amplitude and temperature ondamping capacity of Mg was studied. The result shows that the amplitude independent damping is caused by defect frictionand the amplitude dependent damping is mainly caused by the nucleation and motion of dislocation; the damping of Mgincreased exponentially with the temperature, and the damping peck appeared at 440 K is attributed to the appearance ofdislocations at the grain boundaries which may be caused by boundaries self-diffusion.

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