Dislocation Damping and Defect Friction Damping in Magnesium: Molecular Dynamics Study

Zhai, Jingyu; Xin-yuan, Song; Xu, Aiguo; Chen, Yugang; Han, Qinkai

doi:10.1007/s12540-019-00566-y

Cited by 12 publications

(6 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The corresponding theory of internal friction, based on the string model of dislocation, was created in [14][15][16]. In [20,[34][35][36][37][38][39][40][41], further experimental and theoretical studies of dislocation internal friction were carried out. The study of internal friction is of great practical importance, since materials used for manufacture of structures are operated under variable external loads.…”

Section: Introductionmentioning

confidence: 99%

Internal friction due to radiation drag of edge dislocation bending vibrations in the Peierls relief when interacting with point defects

Dezhin

2024

Third International Scientific and Practical Symposium on Materials Science and Technology (MST-III 2023)

View full text Add to dashboard Cite

In this work, an expression is found for generalized susceptibility of an infinite edge dislocation in a real crystal. Effect of the Peierls relief and elastic interaction between the edge dislocation and chain of point defects are taken into account. Small bending vibrations of the edge dislocation in the Peierls valley are considered. An expression is found for internal friction caused by radiation friction of the edge dislocation bending vibrations. As an example, bending vibrations of the edge dislocation in an aluminum crystal with point defects of "substitution atom" type are considered. Graphs of internal friction frequency dependence are plotted for two possible cases of elastic wave emission by the vibrating edge dislocation.

show abstract

Section: Introductionmentioning

confidence: 99%

Internal friction due to radiation drag of edge dislocation bending vibrations in the Peierls relief when interacting with point defects

Dezhin

2024

Third International Scientific and Practical Symposium on Materials Science and Technology (MST-III 2023)

View full text Add to dashboard Cite

show abstract

“…Theory of internal friction during vibrations of a dislocation segment was created in [27][28][29]. Various modifications and refinements of the theory [27][28][29] and experimental studies of internal friction continue to the present day [30][31][32][33][34][35][36]. In [37], generalized susceptibility (linear response function) of an isolated dislocation was found.…”

Section: Introductionmentioning

confidence: 99%

Generalized susceptibility and small oscillations of edge dislocation in the Peierls relief when interacting with point defects

Dezhin

2024

Third International Scientific and Practical Symposium on Materials Science and Technology (MST-III 2023)

View full text Add to dashboard Cite

In the present work, small oscillations of a rectilinear edge dislocation in a nondissipative crystal are studied. An expression is written for inverse generalized susceptibility of edge dislocation, which takes into account influence of the Peierls relief and elastic interaction with a chain of point defects. It is shown that at, a rectilinear edge dislocation can have only quasi-local oscillations. Expression is found for internal friction due to emission of elastic waves by a oscillating edge dislocation. As an example, oscillations of edge dislocation in aluminum crystal with point defects of "substitution atom" type are considered. Frequencies of quasi-local oscillations of the edge dislocation are calculated and plots of frequency dependence for internal friction are plotted.

show abstract

“…The existence, motion and interaction of lattice defects like dislocations, grain boundaries, second phases, impurity atoms and vacancies are assumed to be connected to the damping capacity of metals. [3][4][5][6] The distribution of strong and weak pinning points in a dislocation has a significant impact on dislocation damping, which is the most crucial of these. 7,8 The solubility of solute elements in high-damping magnesium alloys should be very low, as demonstrated by the findings of earlier investigations.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and damping properties of Mg–Si binary hypoeutectic alloys

Liu,

Sun,

et al. 2024

Materials Science and Technology

View full text Add to dashboard Cite

The effects of Si content and solution heat treatment on the microstructure and damping properties of as-cast Mg–Si hypoeutectic alloys were investigated. Si has the capacity to refine grains of pure magnesium. The three contents of Mg–Si hypoeutectic alloys are all high-damping alloys. The damping value of the as-cast Mg–0.5 wt-%Si alloy was higher than that of the Mg–0.3 wt-%Si and Mg–0.8 wt-%Si alloys in the small strain amplitude area. Compared to the as-cast state, the solution heat-treated Mg–Si hypoeutectic alloys show an increase in damping values, which are close to each other for the three contents in the small strain amplitude area, and decrease with increasing Si content in the high strain amplitude area as in the as-cast state.

show abstract

Dislocation Damping and Defect Friction Damping in Magnesium: Molecular Dynamics Study

Cited by 12 publications

References 41 publications

Internal friction due to radiation drag of edge dislocation bending vibrations in the Peierls relief when interacting with point defects

Internal friction due to radiation drag of edge dislocation bending vibrations in the Peierls relief when interacting with point defects

Generalized susceptibility and small oscillations of edge dislocation in the Peierls relief when interacting with point defects

Microstructure and damping properties of Mg–Si binary hypoeutectic alloys

Contact Info

Product

Resources

About