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and 11.1%, respectively. Key words: Al-Si alloy; hypereutectic; ultrasonic vibration; squeeze casting; non-equilibrium α(Al); semi-solid slurry 1 Introduction High silicon (Si>18%) Al-Si alloys... phases [2]. However, non-equilibrium α(Al) dendrites were found in die-casting [3] or squeeze casting [4] hypereutectic Al-Si alloys. The micro- structure of high-pressure die-cast Al-20%Si alloy......
; 北京联合大学应用技术学院!北京100101 摘 要: 研究了喷射沉积高硅铝合金在半固态触变成形过程中的规律.结果表明 :喷射沉积Al 2 0 %Si, Al 30 %Si, Al 30 %Si 2 %Ni, Al 30 %Si 2 %RE和Al 30 %Si 2 %Ni 2 %RE具有良好的半固态触变成形性能...>国家自然科学基金!资助项目 ( 59771 0 1 1 ); Semi-solid thixoforming of spray formed high silicon hypereutectic Al-Si alloy Abstract: Thixoforming properties of spray formed......
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], but their damping capacities need to be improved. Therefore, Al-Zn-Mg-Cu alloy matrix composites reinforced with Zn-Al alloy will be promising materials, which should have good performance... damping value than profile alloys (P-1 and P-2). The damping property of the rolled sheet aluminum alloy can be improved due to the addition of the rolling process and accompanying modification......
and construction industries due to their good amenability to casting, high specific strength, superior corrosion resistance and low cost[1]. However, hypereutectic Al-Si alloy has a shortcoming, that is, its... that enough ECAP passes are beneficial to increasing corrosion resistance of the hypereutectic Al-23%Si alloy. Key words: aluminum casting alloys; ECAP; corrosion behavior; ultrafine grained microstructure......
Structure and Mechanical Properties of Al-based Gradient Composites Reinforced with Primary Si and Mg2Si Particles through Centrifugal Casting翟彦博1,MA Xiuteng1,MEI Zhen21. College of Engineering... gradient composites prepared by using the ternary Al-19Si-5Mg alloys as the raw material adopting the centrifugal casting method were investigated. Structurally, the composites are divided into two......
成;当x=0.2~0.4时,该材料由呈C40结构的Mo(Si1-x,Alx)2相组成.随着Al含量的增加,Mo(Si,Al)2晶格膨胀增大.1200 ℃氧化时,不同Al含量Mo(Si1-x,Alx)2材料的氧化动力学均呈抛物线规律;Mo(Si,Al)2中Al含量越高,氧化增量越大,抗氧化能力越低.当x=0和0.05时,材料表面氧化生成了连续致密的SiO2氧化膜;当x=0.1时,氧化层由SiO2·Al2O3混合氧化膜组成;当x=0.2~0.4时,材料表面氧化生成连续的Al2O3氧化膜.由于Si和Al的扩散,氧化膜与Mo(Si1-x,Alx)2界面处形成了Mo5(Si,Al)3过渡区. 关键词:MoSi2;Al合金化;氧化膜;氧化行为 中图分类号:TB35  ......
of silicon phase in Al-Si casting alloy[J]. AFS Trans, 1993, 101: 999-1005. [12] MONDOLFO L F. 铝合金组织与性能[M]. 北京: 冶金工业出版社, 1988: 504-508.MONDOLFO L F. Microstructure and properties of aluminum alloy[M... of ideal high-strength and wear-resisting piston material can be obtained. Key words: hypereutectic high-silicon aluminum alloy; Al-Mn-Ti-P-Cu master alloy; Mg; modification; wear mechanism 在铸造材料中,铝合......
Fe相以粗大的花瓣状和汉字状Fe相为主,且富Fe相的粒径尺寸不断增大,数量减少. 图2 不同Mn-Cr含量变质条件下15%Mg2Si/A356-1.5%Fe再生铝基复合材料SEM-BSD组织 Fig. 2 SEM-BSD images of 15%Mg2Si/A356-1.5%Fe recycled Al matrix composites modified...%Mg2Si/A356-1.5%Fe再生铝基复合材料冷却凝固曲线 Fig. 4 Solidification cooling curves of 15%Mg2Si/A356- 1.5%Fe recycled Al matrix composites 图5所示为15%Mg2Si/A356-1.5%Fe复合材料经不同含量Mn/Cr复合变质后的冷却凝固曲线.由图5可看出,不同变质条件下各复合材......