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ZA27-4%Si合金的阻尼性能及阻尼机理 总被引:7,自引:0,他引:7
利用低频内耗测试技术研究了ZA27-4%Si合金的阻尼性能, 分析了合金的阻尼机理. 结果表明 ZA27-4%Si合金阻尼随频率增大而减小, 随温度升高而增大, 阻尼不随应变振幅的变化而变化ZA27-4%Si合金室温阻尼为5.83×10-3, 与ZA27合金阻尼相当ZA27-4%Si合金的阻尼是由合金内部的晶界和相界面滑动、位错振动以及各相的热膨胀系数和弹性模量间差造成的微塑性变形共同造成的. 硅合金化的ZA27合金具有良好耐磨减摩性能和减振性能. 相似文献
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利用钇基重稀土和轻稀土两种不同种类的稀土生产的变质包芯线对高锰钢进行变质细化处理,研究了不同种类稀土及不同加入量对高锰钢冲击值及耐磨性能的影响。结果表明:加稀土较未加稀土试样冲击韧性和初始硬度稍有提高,但变化不明显,但经钇基稀土复合多元合金变质线处理后试样的伸长率比未经稀土处理的试样提高较明显;钇基稀土复合多元合金变质线处理能显著提高锰钢的加工硬化能力,所以高锰钢的耐磨性能被提高了,且轻稀土变质线处理后的试样比未变质的试样耐磨性提高10%~20%,钇基稀土复合多元合金变质线处理后的试样比经普通稀土变质线处理的试样耐磨性提高20%~30%。 相似文献
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研究了影响ZA27合金盐类复合变质效果的工艺参数,并在生产条件下进行了试验.结果表明,在保证较高抗拉强度的前提下,Ti B复合盐能显著提高ZA27合金的伸长率,当复合盐加入量为0.3%时,ZA27合金的伸长率达到16%以上,显示Ti B复合盐变质是一种有效的变质剂,生产条件下ZA27合金的各项力学性能达到锡青铜滑动摩擦耐磨件的性能水平. 相似文献
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利用负压渗流法制备出稀土泡沫锌铝合金,研究稀土La和Ce的添加量对泡沫锌铝合金组织和阻尼性能的影响。结果表明:在泡沫锌铝合金中加入Al-10?或Al-10%La中间合金细化了组织,同时提高了泡沫锌铝合金的阻尼能力;稀土元素的添加量为0.3%时(质量分数)可获得最佳的变质效果和最高的阻尼能力;相对于未变质而言,阻尼能力提高了近3倍;稀土泡沫锌铝合金的阻尼机制与相界面的非弹性粘滞性流动有关,合金的相界面越多,阻尼性能就越好。 相似文献
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Liu Yongchang Lu Yili Yang Gencang Zhu Zhengang State Key Laboratory of Solidification Processing Northwestern Polytechnic University Xian Laboratory of Internal Friction Defects in Solids Chinese Academy of Sciences He 《中国有色金属学会会刊》1997,(1)
INFLUENCEOFCERIUMCONTENTONDAMPINGCAPACITIESOFASSPRAYDEPOSITEDHIGHSILICONALLOYZA27①LiuYongchang,LuYili,YangGencang,ZhuZhengan... 相似文献
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1.IlltroductionThedampingcapacityofamaterialreferstotheabilitytoconvertmechanicalenergyofvibrationintoheatthatisdissipatedinthematerial.Itisofgreatsignificancetoimproveitbecausethehighdampingmaterialcanattenuateundesirablenoiseandvibrationandremovethemtothesurroundingsll,2].Itiswellknownforsometimethatcertainzincaluminumajloysfallintothecategoryofhigh-dampingalloys(HIDALLOYS)['].TheZA27ajloyhashighas-caststrength,hardness,andwearresistanceaswellasotherfavorablephysicalproperties.Itisalmos… 相似文献
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INFLUENCE OF EXTRUSION ON DAMPING CAMCITIES OF AS-SPRAY DEPOSITED HIGH SILICON ALLOY ZA27 MODIFIED BY CERIUM 总被引:2,自引:0,他引:2
1.IntroductionThedampingcapacityofamaterialreferst0itsabilitytoc0nvertmechanicalvibrationenergyint0thermalenergy.Theapplication0fhighdampingmaterialsmayeliminatetheneedforspeciaienergyabs01bers0rdamperst0attenuateundesirablen0iseandmechan-icalvibrati0n.However,m0st0fthefrequentlyusedmetalsandaJl0ysusuallyexhibitalowdampingcapacity,whicharelimitedintheirapplicati0nandperf0rmanceindynamicstructures[l].Accordingly,materialresearchershavesoughtt0improvethedampingcapacityofmetalsandall0ysasseri0us… 相似文献
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Effects of
solidification and melt treatment on microstructure and mechanical properties of cast ZA27
alloy 总被引:1,自引:1,他引:0
1 INTRODUCTIONZinc aluminumalloyZA2 7hasthebestcombinedproperties,especiallywearresistance ,amongzincbasedalloyscontainingahighcontentofalu minum[1] .Widerangesofapplicationshavebeenfoundforthisalloy ,andforbearingmaterialsitre placestinandaluminumbronze .Ino… 相似文献
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Effect of rare earths on phase transformation in as-cast ZA27 alloy dur-ing compressive creep 总被引:1,自引:0,他引:1
WEI Xiaowei SHEN Baoluo) Department of Applied Physics University of Electronic Science Technology of China Chengdu China) Department of Materials Science Engineering Sichuan Institute of Technology Chengdu China) Department of Metal Science Sichuan University Chengdu China 《稀有金属(英文版)》2003,22(4)
The effect of the mixed rare earths of Ce on the phase transformation in as cast ZA27 alloy during compressive creep was investigated under 37 MPa and at 160℃ by X-ray diffraction technique and SEM. The results showed that the as cast microstructure of ZA27-RE alloy consisted of a dendritic Al-rich a' surrounded by Zn-rich β' phase, interdendritic ε phase and Zn-rich η phase together with a complex Z phase which was a complex constitute compound, (RE,Cu)Al5Zn16, dispersed in crystal interfaces or branch crystal interfaces and stable during compressive creep test at 160'C. The phase transformations of ZA27-RE alloy, decomposition of β' phase and four transformation, were delayed by the addition of rare earths, also the lamellar structure and the spheroidized structure in ZA27-RE alloy were finer than in ZA27 alloy during compressive creep test at 160℃ at the same creep time, and the compressive creep resistance of ZA27-RE alloy was higher than that of ZA27 alloy. 相似文献
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Z.M. Zhang)* J.C. Wang) H.Z. Liu) X.F. Guo) ) School of Materials Science & Engineering Xi''''an University of Technology Xi''''an China ) State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi''''an China 《金属学报(英文版)》2006,19(5):379-384
1. Introduction Because ZA27 alloy possesses excellent mechanical properties and high damping capacities, it is widely used in industries. ZA27 alloy has good castability and can be easily cast into various castings by permanent mold casting. The solidification of ZA27 alloy in the permanent mold can be considered to be a nonequilibrium process, and thus the supersaturated aluminum-rich ! phase and unstable copper-rich phase may also be found in the solidified ingot. Those nonequilibrium pha… 相似文献
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高耐磨、高阻尼锌铝合金研究 总被引:15,自引:6,他引:9
通过加入稀土元素和改进热处理工艺,获得一种高耐磨、高阻尼锌铝合金,该合金代替铜合金作为压力机螺母耐磨件,耐磨性是原来的3.5倍,阻尼性能从原来的0.478(1/Q×10-3)提高到3.15(1/Q×10-3) 相似文献
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研究了镧铈混合稀土(RE)变质对ZA40合金组织、力学性能及耐磨性能的影响.试验结果表明,添加适量混合镧铈稀土能促使合金的晶粒细化,抑制共晶硅的生长.RE加入量为0.15%时合金的力学性能明显提高,稀土对合金的硬度影响最大,硬度由112.8HBS上升到150.2HBS,提高了40.6%.拉伸断面由脆性断裂向韧脆性混合断裂转变.合金在干摩擦条件下耐磨性得到提高,在300N载荷时磨损量仅10.1mg,比ZA27合金降低了近65%. 相似文献
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1.IntroductionInrecentyearscontinuousattemptshavebeenmade,particularlyinareasofalloydesignandadoptionofnovelprocesstechniques,todevelophighperformancematerialsasseriouscompetitorstotraditiona1engineeringalloys.Inparticular,muchattentionhasbeengiventoarapidsolidificationtechnique-spraydeposition.Itiswell-knownthatthisprocesshaJsimprovedthemechanicalpropertie8greatlyThosematerialsofferadvantagesinaPplicationswherehighdampingcapacityhighstrengthandhighstiffnessaxea..primaxyconcern.Highdampingal… 相似文献