共查询到19条相似文献,搜索用时 312 毫秒
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退火加热过程对高压电解电容器阳极铝箔立方织构的影响 总被引:13,自引:5,他引:8
采用织构定量检测、 EBSD微取向分析、晶粒尺寸分析等手段研究了退火加热过程对高压电解电容器阳极铝箔立方织构的影响. 结果表明 铝箔在最终退火加热中分别经历了初次再结晶和晶粒长大两个主要过程, 两过程互有重叠, 其中在300℃适当完成初次再结晶并在500℃促使立方取向晶粒长大有利于提高最终的立方织构量; 在500℃长时间加热有可能诱发晶粒异常长大, 并降低立方织构量. 相似文献
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利用Axiovert 25型金相显微镜和德国Leica显微硬度仪对稀土铝箔的再结晶组织和硬度进行了观察和分析,并利用EBSD微取向分析术对稀土铝箔的再结晶织构进行了研究。结果表明,随着Ce含量的增加,再结晶退火后的组织变得更细小,硬度增加。稀土铝箔的再结晶经历了回复、再结晶和晶粒长大三个过程。加入Ce可以增加立方织构的取向密度,但不是越多越好,w(Ce)=0.0074%时立方织构的取向密度最大,且立方织构的取向密度随着再结晶退火温度的增加而增大。 相似文献
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微量Sn对高压阳极铝箔再结晶织构的影响 总被引:2,自引:0,他引:2
采用织构定量检测、背散射电子衍射技术(EBSD)微取向分析等手段研究了微量Sn对高压电解电容器阳极铝箔立方织构的影响.结果表明,铝箔的再结晶织构主要由立方织构及R织构构成,两者的相对强弱随Sn含量有规律地变化,当Sn含量从0.0001 wt%提高到0.001wt%时,在520℃×2 h退火条件下铝箔立方织构含量可达到95%以上,而R织构比例较小.Sn含量过高时,经520℃长时间加热有可能诱发晶粒异常长大,降低立方织构含量.因此,Sn作为环保型代替铅的微量元素可以确保高压阳极铝箔96%以上的立方织构占有率. 相似文献
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以高纯铝箔和不同Ce含量的稀土铝箔为研究对象,运用EBSD技术对高纯铝箔与稀土铝箔冷轧后及不同温度再结晶退火后的织构进行分析,研究再结晶退火过程中织构的演变规律和稀土Ce对铝箔织构的影响。结果表明:轧制总变形率为96%的铝箔,织构以铜型织构、R型织构和一些S织构为主。随最终退火温度的升高,立方织构占有率快速增长。少量稀土元素的加入有利于再结晶退火后立方织构的形成。 相似文献
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应用电子背散射衍射分析(EBSP)对形变量分别为90%、96%和98%的冷轧高纯镍在高温下完全再结晶退火后的微观组织和织构进行分析.结果表明,立方织构随着退火温度和形变量的增大而升高,98%形变量的镍试样在高温退火后可以得到集中的立方织构和较小的晶粒尺寸,是超导覆膜基带的较好选择. 相似文献
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在对长轴分别平行于板法向(ND)、轧向(RD)、横向(TD)的柱状晶样品冷轧组织及织构演变规律分析的基础上,利用XRD与EBSD技术,对不同退火温度下各样品再结晶织构的形成规律进行分析.结果表明,柱状晶样品再结晶织构的演变,一方面体现了初始取向晶粒的"遗传性",即立方织构与Goss织构的形成;另一方面又展示了柱状晶样品不同于单晶及多晶的"特殊性",即{113}织构的形成、Goss晶粒大大超过立方晶粒的生长能力及TD样品中{110}〈110〉取向晶粒的消失.退火温度的变化在不同样品中可造成立方织构的增强或减弱,这取决于再结晶时的形核及长大环境,分析认为TD样品低温时形成最强的立方织构与其在冷轧过程中最强的晶界阻力有关.综合考虑各再结晶织构的转变规律,其形成与定向形核及定向长大均相关.研究还证实,3种柱状晶样品中等压下量冷轧并退火后都可抑制γ线织构的形成. 相似文献
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采用X射线四环衍射技术对比分析了通过冷轧和轧制中间热处理制备的2种Ni-9.3at%W(Ni9W)合金基带的轧制织构和再结晶织构,研究了不同Ni9W合金基带在热处理过程中轧制织构向再结晶织构的演变。其次,采用背散射电子衍射(EBSD)技术对以上2种Ni9W合金基带的微观组织和立方织构进行了表征。结果表明,与传统冷轧Ni9W合金基带的轧制织构相比,经轧制中间热处理后其轧制织构中S取向和Copper取向的含量增加、Brass取向的含量减少,使其轧制织构的类型介于Brass型轧制织构与Copper型轧制织构之间。2种Ni9W合金基带经低温回复后,其轧制织构含量均有一定的增加;另外,再结晶过程中轧制织构的含量均迅速降低,但立方取向的含量并没有明显增加,而是出现大量的随机取向,Ni9W的再结晶具有了连续再结晶的特征,这也是导致Ni9W合金基带较难形成立方织构的一个主要原因。虽然经过轧制中间热处理后Ni9W合金基带在初始再结晶完成后并没有形成一定强度的立方织构,但其立方取向的含量仍然能在进一步热处理过程中通过立方取向晶粒的长大而得到加强。最后,采用轧制中间热处理制备的Ni9W合金基带经两步高温热处理后其立方织构的含量达到84.5%(15°)。 相似文献
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Chunbo Cai Zesheng Ji Huajun Zhang 《Journal of Materials Engineering and Performance》2010,19(5):627-632
To improve the surface morphology, formability, and deep drawing properties of 1050 aluminum alloy sheets, laser-textured
rolls were used in cold rolling process. Effects of laser-textured rolls, comparing with conventional ones, on microstructure
and texture of aluminum alloys after rolling and following recrystallization were studied. In aluminum sheets processed by
laser-textured rolls and conventional rolls, microstructure and texture were similar after rolling, but significantly different
after recrystallization. Laser texturing process results in finer and inhomogeneous recrystallized grains. The recrystallization
texture of the specimen rolled with conventional roll has a major cube component and a minor R component. The intensity of
cube component increases with increasing annealing temperature. However, recrystallization texture of the specimen rolled
with laser-textured roller is much more random. The specimen shows that recrystallization texture has only a weak cube orientation
but strong rotated-cube orientation as well as a much higher fraction of random orientation. 相似文献
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Microstructure and texture in 6016 aluminum alloy during hot compression were researched with a uni- axial compression experiment. Through the electron back- scattered diffraction (EBSD) and X-ray diffraction (XRD) analysis technology, it is shown that the subgrain nucle- ation and recrystallization occur in 6016 aluminum alloy during hot compressing, and strong rolling textures such as (110) fiber texture, Brass, S, and Goss form. With the deformation passes increasing, (110) fiber texture, Brass and S are enhanced. In the heat preservation stage after deformation, recrystallization continues until heat preser- vation for 60 s, and a duplex microstructure of deformation and recrystallization grains is built. At the beginning of heat preservation, recrystallization grains with the Goss texture and random orientation are formed in original grains with S or Brass texture, which makes the volume fraction of S and Brass texture decrease. Then, the complex grain growth process makes the volume fraction of Brass, S, and Goss texture increase, while that of random orien- tation decrease. 相似文献
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利用Gleeble-3500热模拟系统和电子背散射衍射(EBSD)技术对5083铝合金超快速退火组织的演变规律进行了研究,探讨了5083铝合金经过80%冷轧变形后以500 ℃/s加热至450 ℃时,不同保温时间(1~60 s,冷却速度40 ℃/s)对退火组织及力学性能的影响。结果表明,随退火保温时间从1 s延长到60 s,5083铝合金的平均晶粒尺寸由4.94 μm增大到6.44 μm,合金中主要产生了再结晶立方退火织构{001}<100>、旋转立方织构{001}<110>,以及少量的高斯织构{011}<100>和黄铜型织构{011}<211>。当退火保温时间从1 s增加到60 s,整体上合金中的再结晶退火织构先增强再减弱。退火保温时间对5083铝合金的强度影响较小,5083铝合金的屈服强度、抗拉强度没有明显的变化,分别约为170 MPa、326 MPa,而其伸长率由25.63%逐渐增大至30.06%,最后又降低至25.20%。 相似文献
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The influences of aluminum cube texture on etched foil qualities and current efficiency were studied in this paper. The present results indicated that the decrease of cube texture (volume fraction) would lead to the decrease of tunnel densities on etched foils. Current efficiency changed little with cube texture and could reach up to 98%. The same current efficiency led to the same electrochemical corrosion weight loss, which caused the etched foils with a smaller tunnel density had a larger tunnel size. The same electrochemical corrosion weight loss would also lead to the etched foils produced by different cube texture foil have the same folding endurance. The etched foil produced by the foil with a better cube texture would have a larger tunnel density, which caused the capacitance of it was larger. 相似文献