Mechanical and damping properties of thermal treated Mg–Zn–Y–Zr alloys reinforced with quasicrystal phase

Dong, Xiaojuan; Yan, Bangsong; Chen, Shuqun; Li, Zhangbo; Pan, Zhejun; Ling, Hongjiang; Zhao, Fan

doi:10.1016/j.msea.2014.02.055

Cited by 24 publications

(7 citation statements)

References 27 publications

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“…The Granato-Lücke (G-L) mechanism is a wellaccepted theory that explains the damping mechanism by dislocations in Mg alloys. 10,11 According to the G-L dislocation pinning model, the damping capacity can be divided into a strain-amplitude that is weakly dependent and one that is strongly dependent. The value of the strain-weakly damping is proportional to the dislocation density and the average distance between the weak pinning points of dislocations, and the strain-strongly dependent damping is critical to the dislocation density and the average dislocation distance between the strong pinning points.…”

Section: Resultsmentioning

confidence: 99%

Microstructure evolution and damping characteristics in cast Mg-Al-Si alloys

Chen¹,

Dong²

2018

Mater. Tehnol.

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The effects of increasing levels of Si on the microstructure and damping capacities of Mg-Al-Si alloys were investigated. The results show that the morphology of the Mg2Si phase is found to be a function of the Si content. The Mg2Si particles with up to 1.3 % of mass fractions of Si have a Chinese-script morphology and dendritic Mg2Si crystals were precipitated predominantly inside the grains of a 2.3 % of mass fractions of Si-containing alloy. The morphology and volume of the Mg2Si phase as well as the distribution of the Mg17Al12 eutectic have a significant effect on the damping capacity of the alloy. With a low strain amplitude, the dislocation density increases with the formation of Mg2Si particles, improving the damping property, while in the high-strain region, dispersed Mg17Al12 precipitates and coarse Mg2Si particles lead to a reduction of the internal friction.

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Section: Resultsmentioning

confidence: 99%

Microstructure evolution and damping characteristics in cast Mg-Al-Si alloys

Chen¹,

Dong²

2018

Mater. Tehnol.

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“…It can completely meet the requirements of high temperature and high thrust-to-weight ratio for high-performance aero-engines [20]. The main components are shown in Table 1 [21,22], and the internal organization of FGH96 is shown in Figure 4. The maximum speed of the additional high-speed spindle is 90,000 rpm, and the speed is adjusted by a converter.…”

Section: Experimental Materials Of Workpiecementioning

confidence: 99%

Influence of Electroplated CBN Wheel Wear on Grinding Surface Morphology of Powder Metallurgy Superalloy FGH96

Wang

et al. 2020

Materials

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The electroplated cubic boron nitride (CBN) wheel has perfect precision retention and high-temperature grinding performance, which is widely used in the field of grinding difficult-to-cut materials, such as nickel-based superalloy. However, the research on the influence law and mechanism of grinding surface morphology affected by the wear state of small-size grinding wheel is insufficient, which limits the further promotion and application of electroplated CBN wheel in the field of precision grinding of superalloy materials. Based on the in-depth analysis of the structure of FGH96 turbine disk, and combined with the actual processing requirements, the electroplated CBN wheel was designed, and the abrasive grains size selection experiments and CBN wheel wear experiments were then carried out for the powder metallurgy superalloy FGH96 in turn. The influence law of the abrasive grain size of CBN grinding wheel and the wear state of grinding wheel on the surface morphology was investigated, respectively. The obtained results showed that under the given processing parameters, the surface roughness Ra using 400# and 600# electroplated CBN wheels are around 0.66 μm and 0.53 μm during the normal wear state of grinding wheels, respectively, which can meet the requirement of surface quality less than Ra 0.8 μm in engineering application of turbine disk, and prove the feasibility of small-size CBN wheel grinding FGH96. In addition, the failure form of electroplated CBN wheel is mainly the accumulation and adhesion of abrasive debris, and the crushing and shedding of abrasive grain are hard to appear.

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“…Alloys with favorable strength such as Mg-Zn-Y-Zr and alloys with high damping capacity like Mg-Cu-Mn were the research hotspot [32,[39][40][41] . A new damping mechanism called 'LPSO mechanism' was systematically investigated in the series alloy, because the long period stacking ordered (LPSO) structure existing in Mg-Zn-Y-Zr alloys could optimize the mechanical properties as well as damping capacities simultaneously [42,43] . Adding appropriate amount of Y and Zn in Mg-Cu-Mn alloys led to the increase of mechanical properties in different degrees and had no damage to their damping performance [41] .…”

Section: Damping Materialsmentioning

confidence: 99%

Research Progress in Magnesium Alloys as Functional Materials

Chen

Geng

Pan

2016

Rare Metal Materials and Engineering

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Magnesium alloys have a significant advantage, low density over other structure metals currently and have been widely used in various fields such as transportation and aerospace. With the development of research and the enlargement of research scope, more advantages have been developed: high storage capacity, high theoretical volumetric energy density, extraordinarily high damping capacity, good biocompatibility, excellent shielding efficiency as well as impressive thermal conductivity. Therefore Mg alloys have the potential to be various functional materials, such as hydrogen storage material, rechargeable electrochemical batteries, damping material, biodegradable implant material, electromagnetic shielding material, and thermal conductive material. Unfortunately, each kind of functional material has bottlenecks needing to be broken through, and a lot of researches have to be carried out. This review comprehensively covers the research progress and the up-to-date summary of Mg and Mg alloys as functional materials in recent years. The six kinds of functional materials above all will be discussed.

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Mechanical and damping properties of thermal treated Mg–Zn–Y–Zr alloys reinforced with quasicrystal phase

Cited by 24 publications

References 27 publications

Microstructure evolution and damping characteristics in cast Mg-Al-Si alloys

Microstructure evolution and damping characteristics in cast Mg-Al-Si alloys

Influence of Electroplated CBN Wheel Wear on Grinding Surface Morphology of Powder Metallurgy Superalloy FGH96

Research Progress in Magnesium Alloys as Functional Materials

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