|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 功率超声对合金熔体处理和晶粒细化的研究现状显示文摘超声波在金属凝固中形成的多种效应能改变金属的凝固行为,并能获得优良组织和性能的材料,其中超声波的声空化效应和声流效应对熔体和细化晶粒的影响较大。本文综述了超声波对Al、Mg、Fe、Sn、Ti等合金和非金属熔体及细化晶粒方面的影响。并对Pb合金电极材料的熔体与晶粒尺寸及分布的影响进行了研究,发现对不同合金采用不同的处理时间和处理功率方可获得最佳的工艺。还介绍了功率超声在非金属熔体及细化晶粒方面的应用前景。 | 郭晓亮 周生刚 竺培显 张能锦 | 2016 | 热加工工艺2016，45，7： | 5 |
| 2 | 电磁离心铸造Al-15Si-6Ni外层颗粒增强梯度材料成形机制显示文摘在常规的过共晶Al-Si合金离心铸造成形时,初晶Si颗粒、气孔和夹渣会同时在内层偏聚,降低了Si颗粒在增强层的强化作用。为了避免这一缺点,以Al-15%Si-6%Ni为坯料,采用电磁离心铸造的方式进行成形,成功制备了初晶Si与初晶NiAl_3颗粒在外层偏聚,气孔、夹渣在内层偏聚的梯度复合材料。对不同工艺参数下的多个试样分析显示,在离心力场中,密度较大的初晶NiAl_3颗粒会推动密度较小的初晶Si颗粒一起向外层运动,形成外层具有高体积分数的梯度复合材料。电磁场的施加,有效降低了初晶颗粒的粘连与团聚,并细化了晶粒。 | 唐立超 翟彦博 | 2019 | 铸造2019，68，3： | 3 |
| 3 | Effect of compound field on horizontal continuous casting of Al-1wt.%Si alloy显示文摘A travelling magnetic field, a power ultrasonic field, and a compound field were used separately during the horizontal continuous casting process of Al-1wt.%Si alloy. The samples obtained were characterized using an optical microscope, a scanning electron microscope, a tensile testing machine, and an electron probe microscopic analyzer to test the microstructures, properties, and element distribution of the samples. The results show that the application of a single fi eld can enhance the mechanical properties and reduce the segregation of Si element in Al-1wt.%Si alloy to some extent. The application of a compound field can obtain the best refi nement and homogeneity of the Si element in the alloy, leading to the highest increase of tensile strength and elongation among the three applied fi elds. The mechanism of the action of external fi elds on the refi nement of microstructures and homogeneity of the Si element is discussed and the compound fi eld is considered to be an effective method to achieve high quality Al alloys. | Zhong-tao Zhang Hong-yun Yue Jian Zhang Shu-ting Yang Ting-ju Li | 2015 | China Foundry2015，12，2： | 2 |
| 4 | Influence of Si content and heat treatment on microstructure of Al-Fe-Si alloys显示文摘The effect of Si addition and heat treatment on the Al-5wt.%Fe alloy has been investigated by OM, SEM-EDS and XRD. The results show that the Si plays a significant role in refining the primary Al3 Fe phase. It was found that the addition of 3.0wt.% Si made the alloy present the finest and well-distributed primary Al3 Fe phase, but the Al3 Fe phase almost disappeared when 5wt.% Si was added. With further increase in the Si content, some Fe-rich phases appeared in the inter-grains and coarsened. In addition, the heat treatments exert a significant impact on the microstructural evolution of the Al-5wt.%Fe-5wt.%Si alloy. After heat treatment for 28 hours at 590 oC, the coarse platelet or blocky Fe-rich phase in Al-5wt.%Fe-5wt.%Si alloys was granulated; the phase transformation from metastable platelet Al3 FeSi and blocky Al8Fe2 Si to stable Al5 FeSi had occurred. With the extension of heat treatment, the Si phase coarsened gradually. | Zhao Yuhua Wang Xiubin Liu Yulin Wang Chao | 2014 | China Foundry2014，11，5： | 1 |
| 5 | 双超声探头处理对7116铝合金DC铸造大铸锭凝固组织的影响显示文摘对7116铝合金进行了双超声处理,对比研究了不同部位的凝固组织,并分析了超声细化的机理。结果表明,铸锭整体细化效果明显,凝固组织比较分散、细小,不同部位的凝固组织均比单一超声细化效果更优。与未经超声处理的铸锭组织相比,铸锭边缘、1/4直径处和心部的晶粒尺寸分别下降了63.4%.76.3%和55.5%。 | 贾征 喻兵 付丽 | 2021 | 铸造技术2021，42，8： | 1 |
| 6 | 超声处理对Al-5Si合金除气效率的影响显示文摘考察了超声处理对Al-5Si合金除气效率的影响,对超声除气的机理进行了分析。研究发现,恰当的超声处理时间对合金有良好的除气效果;当超声处理时间为60〜120s时,铸锭的除气效果比较理想,密度和除气率最大值分别达到2.6613 g/cm^3和69.0%;同时,超声处理可使共晶Si颗粒变得分散和均匀;采用C2Cl6除气剂-超声联合处理可在短时间内达到良好除气效果,具有很高的除气效率。 | 杜安娜 刘岩 贾征 徐海鹏 陈杼鑫 | 2020 | 铸造2020，69，10： | 1 |
| 7 | 加载路径对Sr变质A319铝合金疲劳行为的影响显示文摘研究了Sr变质A319铸造铝合金在0.2%应变幅不同加载路径条件下的疲劳性能,包括循环应力响应特征及疲劳寿命,并分析了失效试样的断口特征以及Si颗粒的破坏方式。结果表明:在不同加载路径下材料发生循环硬化程度和速率从大到小排序是:圆形加载、比例加载和单轴加载;疲劳寿命随着加载路径的变化与材料循环硬化程度和速率随着加载路径的变化相对应。断口分析结果表明,宏观断口在比例路径下表现为'人'字形的两条主裂纹,且从单轴、比例到圆形路径,裂纹源区逐渐不明显,裂纹源区和稳定扩展区尺寸也变小;在单轴加载条件下裂痕的断面基本上与主轴平行,而在多轴加载条件下裂痕的分布较为分散。 | 田丹丹 何国球 沈月 刘晓山 樊康乐 莫德锋 | 2014 | 材料研究学报2014，28，10： | 0 |
| 8 | Effects of direct ultrasonic treatment on microstructure and elongation of semi-solid Sn-62Bi alloy显示文摘A new direct ultrasonic treatment(DUT) setup with the ultrasonic horn placed in the horizontal direction was developed and used in the preparation of semi-solid Sn-62 Bi slurry. The influence of DUT temperature on microstructure and properties of Sn-62 Bi alloy were studied. The test results of XRD showed that the semi-solid Sn-62 Bi alloy obtained by the DUT process exhibits pronounced preferential orientation of Bi(2 0 2), Bi(-1 1 1), Bi(-2 0 1), Sn(1 1 0) and Sn(2 2 0) planes. Compared to the conventional liquid casting Sn-62 Bi alloy without DUT, it was discovered that the primary Bi blocks of semi-solid Sn-62 Bi alloy prepared with the DUT process distribute more homogeneously and are smaller. With the treatment by ultrasonic vibration in the semi-solid state for 120 s, the higher the primary Bi phase fraction in the slurry, the smaller the size of primary semi-solid Bi blocks formed after solidification. The average side length of the primary Bi blocks was from 30 μm to 80 μm. The elongation of Sn-62 Bi alloy treated by DUT for 120 s at 145 °C is 43.21%, reflecting a distinctly improvement by 129.10%, as compared to the conventional liquid casting Sn-62 Bi alloy without DUT. This indicates that DUT process could improve dramatically the ductility of Sn-62 Bi alloys content. The microstructure evolution mechanism of semi-solid Sn-62 Bi alloy slurry was also analyzed. | Hui-ting Zheng Yong-jun Hu Ren-jie Li Hong-huan Yang Xiao-yan Sun Zhi-hao Li | 2015 | China Foundry2015，12，3： | 0 |
| 9 | 高强超声处理和强制冷却对Al-5Cu合金组织细化及除气效果的影响显示文摘研究了高强超声联合铸锭底部强冷处理对Al-5Cu合金凝固组织的影响,并采用密度法研究了除气效果。结果表明,超声联合铸锭底部强制冷却处理具有良好的细化和除气效果,当2000 W×120 s时细化效果最佳;铸锭断面几乎为100%等轴晶且内部组织致密、无气孔,此时铸锭密度为2.7911×10^(3)kg·m^(-3),除气率为95.1%。最后对其细化及除气的机理进行了分析。 | 喻兵 贾征 韩旭 宋婧怡 刘玉鹏 陈晓东 | 2022 | 铸造技术2022，43，2： | 0 |
| 10 | 基于材料成型大赛与《液态成型原理》课程实验的深度融合显示文摘以“材料成型大赛”为例,采用“课程教学-大赛实验-探索分析-创新能力培养”的教学方法,将材料成型大赛与《液态成型原理》课程进行深度融合。结果表明,深度融合结果不仅将优秀教学资源高效整合,使教学更生动,而且可让学生深入理解课程相关知识点,增强学生的学习专业知识浓厚兴趣、创新能力和积极探索能力。 | 贾征 喻兵 牛建平 宋婷婷 邵一川 | 2021 | 铸造技术2021，42，8： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员