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Microstructure and damping properties of MnCuNiFeCe alloy

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Rare Metals 2016年第8期35卷 615-619页

作者： Feng-Shuang Lu Bin Wu Jian-Fu Zhang Ping Li Dong-Liang Zhao Functional Materials Research Institute Central Iron and Steel Research Institute Beijing 100081 China Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China Beijing Key Laboratory of Precision Alloys Beijing 100081China

Mn-Cu alloys could exhibit high damping ability and excellent mechanical properties after proper heat treatment. In order to reduce the influence of impurity elements on damping capacity of Mn-Cu alloys, rare ele- ment cerium （Ce） was added into MnCuNiFe alloys. It is indicated that the contents of C, S and Si which have adverse effects on the damping capacity decrease and the grains are refined with the Ce content increasing. The microstructure of the MnCuNiFeCe alloy was investigated by X-ray diffraction （XRD）, scanning electron microscope （SEM） and transmission electron microscopy （TEM）. The damping ability （tane） of the alloy was characterized by dynamical mechanical analyzer （DMA）. It is found that the damping ability （tane） retains a very high level which is all above 0.05 from the temperature of -50 to 75 ℃ with the addition of Ce element. It is expected that the Ce alloying MnCuNiFe alloy with refined grains could find wide applications in the field of industry.

关键词： Mn-Cu alloy damping properties Cerium

Natural rubber/nitrile butadiene rubber/hindered phenol composites with high-damping properties

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International Journal of Smart and Nano Materials 2015年第4期6卷 239-250页

作者： Xiuying Zhao Jingna Yang Detao Zhao Yonglai Lu Wencai Wang Liqun Zhang Toshio Nishi Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials Beijing University of Chemical TechnologyBeijing 100029P.R.China Beijing Engineering Research Center of Advanced Elastomers Beijing University of Chemical TechnologyBeijing 100029P.R.China Department of Organic and Polymeric Materials Graduate School of Science and EngineeringTokyo Institute of Technology2-12-1 O-okayamaMeguro-kuTokyo 152-8552Japan

New natural rubber(NR)/nitrile butadiene rubber(NBR)/hindered phenol(AO-80)composites with high-damping properties were prepared in this study.The morpholo-gical,structural,and mechanical properties were characterized by atomic force micro-scopy(AFM),polarized Fourier transform infrared spectrometer(FTIR),dynamic mechanical thermal analyzer(DMTA),and a tensile tester.Each composite consisted of two phases:the NR phase and the NBR/AO-80 phase.There was partial compat-ibility between the NR phase and the NBR/AO-80 phase,and the NR/NBR/AO-80(50/50/20)composite exhibited a co-continuous morphology.Strain-induced crystal-lization occurred in the NR phase at strains higher than 200%,and strain-induced orientation appeared in the NBR/AO-80 phase with the increase of strain from 100%to 500%.The composites had a special stress–strain behavior and mechanical properties because of the simultaneous strain-induced orientation and strain-induced crystalliza-tion.In the working temperature range of a seismic isolation bearing,the composites(especially the NR/NBR/AO-80(50/50/20)composite)presented a high loss factor,high area of loss peak(TA),and high hysteresis energy.Therefore,the NR/NBR/AO-80 rubber composites are expected to have important application as a high-perfor-mance damping material for rubber bearing.

关键词： natural rubber nitrile butadiene rubber damping properties strain-induced orientation rubber bearing

A Review of Influencing Factors of damping properties of High Manganese Steel

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Journal of Materials Science and Chemical Engineering 2023年第3期11卷 52-64页

作者： Chao Chen Jiale Wang Jianyu Jiao Fengmei Bai Guangwen Zheng Anhui Province Key Laboratory of Metallurgical Engineering & Resources Recycling (Anhui University of Technology) Ma’anshan China School of Metallurgical Engineering Anhui University of Technology Ma’anshan China

High manganese steel has wide prospects in industry due to their excellent mechanical and damping properties. The quenching structures of high manganese steel are ε-martensite, γ-austenite and α'-martensite. Researches show that the damping properties of high manganese steel are related to these microstructures. Besides, there are many ways to improve the damping property of damping alloys. This paper reviews the damping mechanism and the influences of the ad-dition of alloying elements, heat treatment, pre-deformation and other factors on their damping performance, hoping to provide methods and ideas for the study of damping properties of high manganese steel. .

关键词： High Manganese Steel damping properties Alloying Elements Heat Treatment Deformation

Effects of Fiber Volume Fraction on damping properties of Three-Dimensional and Five-Directional Braided Composites

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Journal of Donghua University(English Edition) 2015年第3期32卷 458-465页

作者：高岩李嘉禄 Composites Research Institute of Tianjin Polytechnic University

The effects of fiber volume fraction on damping properties of carbon fiber three-dimensional and five-directional( 3D-5Dir)braided carbon fiber / epoxyres in composite cantilever beams were studied by experimental modal analysis method. Meanwhile,carbon fiber plain woven laminated / epoxy resin composites with different fiber volume fraction were concerned for comparison. The experimental result of braided specimens shows that the first three orders of natural frequency increase and the first three orders of the damping ratios of specimens decrease, when the fiber volume fraction increases. Furthermore,larger fiber volume fraction will be valuable for the better anti-exiting property of braided composites,and get an opposite effect on dissipation of vibration energy. The fiber volume fraction is an important factor for vibration performance design of braided composites. The comparison between the braided specimens and laminated specimens reveals that 3D braided composites have a wider range of damping properties than laminated composites with the same fiber volume fractions.

关键词： damping properties experimental modal analysis three-dimensional and five-directional(3D-5Dir) braided composites free vibration characters fiber volume fraction

The Influence of Fiber Type and Conformation on the damping Property of FRP Composite

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Journal of Wuhan University of Technology(Materials Science) 2012年第3期27卷 450-453页

作者：王翔王钧 School of Materials Science and Technology Wuhan University of Technology

In order to get a fiber reinforced plastic（FRP） composite with good damping property as well as good mechanical properties, different types of reinforcing materials were used to reinforcing a damping resin. The influence of fiber types and conformation on the damping property of the composite are tested. Compared to the glass fiber（GF）, carbon fiber（CF） can improve the damping factor of the composites; the highest tanδ value is 0.827 while the Tg is 22.5 ℃. The style of the fibers also influences the damping factors of the composite. The composite reinforced with mat has higher loss factors than that composite reinforced with clothe for the reason that the former has the ability to deform and the composite has higher resin content. The loss factor of GF mat reinforced composite is 0.704 while the Tg is 27 ℃. Both composite has good damping properties and can be used as the damping layer of the structural damping composite.

关键词： composite damping properties fiber conformation

硅橡胶/IIR泡沫合金材料的力学阻尼性能研究

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硅橡胶/IIR泡沫合金材料的力学阻尼性能研究