Effect of deformation twins on damping capacity in extruded pure magnesium

Watanabe, Hiroyuki; Sasakura, Yasuyoshi; Ikeo, Naoko; Mukai, Toshiji

doi:10.1016/j.jallcom.2014.11.143

Cited by 43 publications

(9 citation statements)

References 17 publications

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“…Twinning-detwinning behaviour was also often observed in fatigue experiments [22,32]. Watanabe and co-workers studying the internal friction in textured pure magnesium found twinning as the important damping mechanism [33]. On the other hand, movement of the twin boundaries as a special type of dislocation may not be excluded as an additional source of internal friction.…”

Section: Rolled Alloymentioning

confidence: 79%

Amplitude Dependent Internal Friction in a Mg-Al-Zn Alloy Studied after Thermal and Mechanical Treatment

Trojanová

Lukáč

Džugan

et al. 2017

Metals

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Abstract:The amplitude-dependent internal friction of continuously-cast and rolled AZ31 magnesium alloy was measured in this study. Samples were annealed and quenched step by step; immediately after the treatment, the amplitude dependence of the logarithmic decrement was measured. Changes in the microstructure due to thermomechanical treatment were reflected in changes in the damping. Internal friction is influenced by the dislocation substructure and its modification due to solute atoms migration, microplastic deformation, and twins' formation. Internal friction in the rolled sheets is affected by the rolling texture.

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Section: Rolled Alloymentioning

confidence: 79%

Amplitude Dependent Internal Friction in a Mg-Al-Zn Alloy Studied after Thermal and Mechanical Treatment

Trojanová

Lukáč

Džugan

et al. 2017

Metals

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“…Predeformation in compression increased the dislocation density and density of the newly created twins. The influence of twins on IF has been observed in several studies [29,43]; the twin boundaries are due to some inhomogeneity in the material and so influences the IF values. Note that the effect of the twins' boundary does not depend on the strain amplitude.…”

Section: Discussionmentioning

confidence: 96%

Amplitude Dependent Internal Friction in Strained Magnesium Alloys of AZ Series

et al. 2020

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Amplitude dependent internal friction (ADIF) was measured in three AZ magnesium alloys. Two types of experiments were performed: ADIF was measured step by step with the increasing strain amplitude and ADIF was measured after predeformation of samples in torsion. All experiments were done at room temperature. The quality factor was used as a measure of internal friction (IF). The quality factor decreased in the region of smaller amplitudes, and approaching some critical amplitude, εcr, rapidly increased. This critical amplitude increased with increasing maximum strain amplitude and predeformation of samples up to ~6%. Such behavior can be explained by considering mobile solute atoms, which may migrate along the dislocation line in the region of smaller amplitudes and perpendicular to the dislocation line in the region of higher amplitudes. A competition between dragging and depinning of solute atoms with dislocation lines may very well explain the measured dependencies.

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“…Firstly, twining plays a very important role in improving damping characteristics of a material. Recent work of Watanabe et al 3 established that pre-existing twins [10][11][12] enhanced the damping capacity of pure magnesium significantly without a compromise in its strength. An effort has been carried out to count number of twins per grain and the average length of twins for all pure Mg and composites samples (Table 2).…”

Section: Damping Capacity Of Magnesium and Its Compositesmentioning

confidence: 99%

“…Material damping characteristics are very important in vibration control. 3,4 For example, good vibration damping control in luxury cars leads to passengers' comfort. In electronic devices, vibrations if not controlled, can trigger fatigue failure over a short time of use.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and damping characteristics of Mg and its composites containing metastable Al₈₅Ti₁₅ particle

Nguyen

Nai

Nguyen

et al. 2015

Journal of Composite Materials

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This paper reports for the first time the damping behavior of Mg-Al85Ti15 metastable composites synthesized using near dense blend-press-microwave sinter-hot extrusion methodology. Optical microscopy results show that the metastable particles were located along the grain boundaries and the formation of twins within the grains. In addition, scanning electron microscopy reveals reasonable distribution of particles, good matrix-particle interfacial bonding and minimal presence of microvoids. The damping test results show an increment in damping capacity and damping loss rate with the presence and increasing amount of particles. The effect of microstructure on damping characteristics of magnesium and damping mechanisms are discussed.

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Effect of deformation twins on damping capacity in extruded pure magnesium

Cited by 43 publications

References 17 publications

Amplitude Dependent Internal Friction in a Mg-Al-Zn Alloy Studied after Thermal and Mechanical Treatment

Amplitude Dependent Internal Friction in a Mg-Al-Zn Alloy Studied after Thermal and Mechanical Treatment

Amplitude Dependent Internal Friction in Strained Magnesium Alloys of AZ Series

Microstructure and damping characteristics of Mg and its composites containing metastable Al₈₅Ti₁₅ particle

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Effect of deformation twins on damping capacity in extruded pure magnesium

Cited by 43 publications

References 17 publications

Amplitude Dependent Internal Friction in a Mg-Al-Zn Alloy Studied after Thermal and Mechanical Treatment

Amplitude Dependent Internal Friction in a Mg-Al-Zn Alloy Studied after Thermal and Mechanical Treatment

Amplitude Dependent Internal Friction in Strained Magnesium Alloys of AZ Series

Microstructure and damping characteristics of Mg and its composites containing metastable Al85Ti15 particle

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Microstructure and damping characteristics of Mg and its composites containing metastable Al₈₅Ti₁₅ particle