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damping peak
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  内耗峰
     The internal friction at 400-850℃ in high-pure Fe-Nb-C alloys has been measured, and a large stress-dependent magnetomechanical hysteresis damping peak of which the peak temperature varies from 666 to 740℃ as strain amplitude changes was discovered.
     测量了高纯Fe-Nb-C合金的400-850℃内耗,发现一个峰温度随测量应变振幅变化的高温(666-740℃)磁机械滞后阻尼内耗峰
短句来源
     EFFECT OF HEAT TREATMENTS ON THE DAMPING PEAK OF SiC_P/6061Al MMC PRODUCED BY SPRAY CODEPOSITION
     热处理对喷射共沉积SiC_P/6061Al复合材料内耗峰的影响
短句来源
     It was found that the addition of RE could delay the temperature of damping peak.
     RE的加入推迟了温度内耗峰出现的温度。
短句来源
     There exists high damping peak associated with the diffusional pearlitic transformation in Fe-Ni-C , indicating that the motion of interphase , especially the interface with high boundary energy , plays an important role to internal friction.
     Fe—Ni—C在扩散型(珠光体)相变时呈现较高的内耗峰,说明相界面(尤其是高能相界面)的运动对相变内耗起到重要作用.
短句来源
     By Arrhenius equation we can get the active energy of the damping peak, which is above 1 eV. On the other hand, different quenching treatments affect the damping peak remarkably;
     通过Arrhenius方程测得内耗峰的激活能均高于1eV;
短句来源
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  阻尼峰
     SiC coating can significantly reduce the damping capacity of 2D C/SiC composites,and eliminate the damping peak on the damping characteristic curve.
     S iC涂层可大幅度降低2D C/S iC复合材料的阻尼性能,消除阻尼特性曲线上的阻尼峰;
短句来源
     The damping peak value of 2D C/SiC composites decreases with the increase of the vibration frequency.
     2D C/S iC复合材料阻尼峰随加载频率的升高而降低;
短句来源
     3. The effects of coating and heat treatment on the damping peak of C/SiC composites were studied.
     (3) 研究了涂层和热处理对C/SiC复合材料阻尼峰的影响。
短句来源
     The high-temperature thermal treatment can make the damping peak value of 2D C/SiC composites decrease.
     高温热处理使2D C/S iC复合材料阻尼峰降低。
短句来源
     The damping capacity of 2D C/SiC composites prepared by CVI process was measured,and the damping mechanism of the composites was discussed. Furthermore,the effects of the coating,test frequency and thermal treatment on the damping peak of the composites were analyzed.
     测试了CVI工艺制备的2D C/S iC复合材料的阻尼性能,讨论了其阻尼机制,分析了涂层、测试频率和热处理等因素对其阻尼峰的影响。
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  “damping peak”译为未确定词的双语例句
     Critical assessment is given of available data on the nomenclature, experimental results and the theoretical approach to so-called cold work (CW) peak, 200 ℃, 220 ℃ or 250 ℃ damping peak, the Snoek-Koster (SK) peak, and the Snoek-Ke-Koster (SKK) peak.
     根据有关术语、实验结果和理论处理方法的现有数据,对冷加工峰,200,220或250℃峰, Snoek—Koster(SK)峰,以及Snoek—Ke-Koster(SKK)峰进行了评估.
短句来源
     Two stage phase transformation M→R→P takes place during heating process, in which the damping peak of M→R transformation is much higher than that of R→P transformation.
     合金在升温过程中出现二次相变 (M→R→P) ,M→R的相变阻尼远远高于R→P的相变阻尼
短句来源
     The results show that the damping peak value of 2D C/SiC composites is about 1.86×10~(-2),and the damping mechanism mainly includes microcrack expansion,reinforcement fiber damping and the interface damping.
     结果表明,2D C/S iC复合材料的阻尼峰值可达1.86×10-2,其阻尼机制主要为微裂纹扩展、增强纤维阻尼及界面阻尼;
短句来源
     It was also foundthat a relationship existed between the curing degree,the height of the damping peak at lowtemperatures,and,thereby,the motion of the segments of the network molecules.
     并且可以看出,低温条件下,固化效应与相应温度下损耗峰和固化网络部分链段运动有关。
短句来源
     On the other hand, the damping peak of spraydeposited Al17Si alloy with the addition of La was evidently higher than that in Lafree Al17Si alloy.
     La的添加明显提高喷射成形态Al Si合金阻尼性能。
短句来源
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  damping peak
The DMA spectra showed a single damping peak for the ENR/CR blends, which suggests that ENR and CR are miscible.
      
An estimate showed that the resonant damping peak can reach 100 dB/cm while the shift ΔV/V of the SAW velocities in the resonance region exceeds 10-2.
      
A damping peak was observed in the range of 150-200 °C, which is related to dislocation motion.
      
The carbon-phenolic composite shows a damping peak at 250 °C, which is probably due to the transition from glassy state to rubbery state of the phenolic matrix.
      
The model allows the determination of the damping peak arising from the molecular movements which it expresses.
      
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Conditions for the appearance of the anomalous dislocation damping peaks in Al-0.5% Cu alloy were further studied with a low frequency torsion pendulum. Experimental results showed that a suitable amount of cold working is necessary for a fully annealed specimen but not for specimens quenched from an elevated temperature.

用低频扭摆进一步研究了在Al-0.5%Cu合金中观察到反常位错内耗峯的条件。结果指出,对于完全退火的试样来说,需要有适当的冷加工量,但是对于高温淬火试样则不需要冷加工。 用位错气团模型定性地解释了过去所观测到的表现反常振幅效应的时效内耗峯和温度内耗峯;同时指出,简单的气团模型在作定量的解释时,遇到了下述的困难:(i)在测量内耗所用的交变应力的作用下,位错线所能够拖着气团移动的距离太短。(ii)为了气团能够被位错拖着移动,组成气团的溶质原子必须具有比通常大很多个数量级的扩散系数。(iii)根据气团模型,从理论上计算出来的使位错拖着气团以临界速度而移动时,所需的临界应力比观测值大几百倍。 提出了溶质原子沿着位错弯结而扩散的气团模型,这个改进模型能够初步解决上述困难,并能定性地解释所观测的结果。这个模型所依据的基本假设是,要观测到反常内耗现象,位错线上必须具有一定数目的弯结。要得到这种弯结,可以对于退火试样进行适量的冷加工,或者把试样从高温淬火。带着弯结的位错线能够通过弯结的沿边运动而实现垂直于位错线方向的移动。可以假定,气团只在弯结两端的直位错段处形成,在弯结本身上并不形成气团。在弯结的沿边振动的过程中,聚集在弯...

用低频扭摆进一步研究了在Al-0.5%Cu合金中观察到反常位错内耗峯的条件。结果指出,对于完全退火的试样来说,需要有适当的冷加工量,但是对于高温淬火试样则不需要冷加工。 用位错气团模型定性地解释了过去所观测到的表现反常振幅效应的时效内耗峯和温度内耗峯;同时指出,简单的气团模型在作定量的解释时,遇到了下述的困难:(i)在测量内耗所用的交变应力的作用下,位错线所能够拖着气团移动的距离太短。(ii)为了气团能够被位错拖着移动,组成气团的溶质原子必须具有比通常大很多个数量级的扩散系数。(iii)根据气团模型,从理论上计算出来的使位错拖着气团以临界速度而移动时,所需的临界应力比观测值大几百倍。 提出了溶质原子沿着位错弯结而扩散的气团模型,这个改进模型能够初步解决上述困难,并能定性地解释所观测的结果。这个模型所依据的基本假设是,要观测到反常内耗现象,位错线上必须具有一定数目的弯结。要得到这种弯结,可以对于退火试样进行适量的冷加工,或者把试样从高温淬火。带着弯结的位错线能够通过弯结的沿边运动而实现垂直于位错线方向的移动。可以假定,气团只在弯结两端的直位错段处形成,在弯结本身上并不形成气团。在弯结的沿边振动的过程中,聚集在弯结两端的溶质原子可以沿着位错管道进行来回?

The damping of the commercial Fe-25Cr-5Al Alloy containing 0-0,303wt% RE has been measured in a temperature range from 450℃ to 760℃ by use of a vacumm torsional pendulum (Ke's pendulum) under conditions of about 10-4 mm Hg vacuity and a frequency of 0.78 c/s.Two damping peaks have been observed in the RE-free alloy.One occures at about 542℃and the another about 680℃ respectively.Particular care has been taken to observe whether could RE be solved in lattice of the alloy and whether could it give...

The damping of the commercial Fe-25Cr-5Al Alloy containing 0-0,303wt% RE has been measured in a temperature range from 450℃ to 760℃ by use of a vacumm torsional pendulum (Ke's pendulum) under conditions of about 10-4 mm Hg vacuity and a frequency of 0.78 c/s.Two damping peaks have been observed in the RE-free alloy.One occures at about 542℃and the another about 680℃ respectively.Particular care has been taken to observe whether could RE be solved in lattice of the alloy and whether could it give rise to effect both Zener's relaxation and grain boundary relaxation in the alloy.The results of measurement show that RE will preferably segregate to grain boundaries as its contents below 0.05 wt.%,As above 0.05 wt.%,RE would begin to resolve in lattice and give an effect on the Zener's relaxation.Up to 0.167 wt.% the alloy will be saturated with such a RE.The activation energy of the grain boundary would be increased by adding the tracing RE to the alloy.Its maximum value is about 80 kcal/mol as the specimen containing 0.042 wt.% RE.As above 0.08 wt.% RE,the background damping will be risen with the increasing RE contents.

使用内耗法,观察稀土对Fe-25Cr-5Al合金的Zener弛豫及晶界弛豫的影响,探讨稀土的晶内固溶及其在晶界偏聚的情况。

Dynamic Viscoelastic Properties of Nitrocellulose, double base binder and Composite modified double -base propellant Were Studied With a technjc of Torsion Braid Analys is ( TEA )1.Tests of Nitrocellulose Was made repeatedly in The range of 0-220℃, Its damping PeaK appears at about 176℃ Which is Very close to the Value of fhe glass transition temperature of Nitrace llulose,2.For CMDB sample there is only one damping peak to be secn in the range of - 120°- + 120℃ Which occurs at 28℃, it may be regarded...

Dynamic Viscoelastic Properties of Nitrocellulose, double base binder and Composite modified double -base propellant Were Studied With a technjc of Torsion Braid Analys is ( TEA )1.Tests of Nitrocellulose Was made repeatedly in The range of 0-220℃, Its damping PeaK appears at about 176℃ Which is Very close to the Value of fhe glass transition temperature of Nitrace llulose,2.For CMDB sample there is only one damping peak to be secn in the range of - 120°- + 120℃ Which occurs at 28℃, it may be regarded as glass transition temperature of CMDB.3.In Contrast to the above results, there are four damping Peaks on the thermograph double base binder i.e.-50℃ ,28℃ ,133℃ ,178℃respect ively . The analysis of the Physical Properties of the main Components of double base binder reveal that the damping Peaks appeared on the thermograph are closely relative to the their glass transition temperature and decomposable temperature

本文用扭辩分析法研究了硝化棉,双基粘合剂及改性双基推进剂的动态粘弹性。 由硝化纤维素的动态扭辩分析实验,测得硝化纤维素的玻璃化转变阻尼峰,取得硝化纤维素的玻璃化转变温度T_g值。 对双基粘合剂进行动态扭辩分析实验,所得粘弹谱图在较宽的温度范围(-110℃~+200℃)呈现出的四个阻尼峰进行了分析研究,认为硝化甘油对硝化棉在低温为有限溶解,因此在低温-50℃左右出现的阻尼峰与纯硝化甘油的玻璃化转变温度T_g有关。解释了约28℃、133℃、178℃的三个阻尼峰,分别为双基粘合剂体系的玻璃化转变温度T_g,双基粘合剂中硝化甘油的分解温度及硝化棉的玻璃化转变温度。 本文对改性双基推进剂的动态粘弹性也进行了实验研究,从所得热谱图分析了改性双基推进剂的动态粘弹性,并指出推进剂动态粘弹性的实际使用意义。

 
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