Development of Ecological Al-Al_3Fe Functionnally Graded Material

铝可以被刮除，钢罐的体积很小，而且是完全不可能的。这是很困难的，而且成本很高，可以完全地去除钢罐，并重新制作碎片。我们如何从经济学的角度对结构和成分材料进行有效的重新加工？这就是当前研究的动力。考虑到铝-铁系统的两个相位图，Al_3Fe的间金属化合物首先在富铝方面发现。金属间金属学被称为坚硬而微小的性质，但在一般情况下，它们有许多未知的属性，这些属性很难在参考资料中找到。是否有可能制造Al-Al_3Fe功能分级的材料（切割女性生殖器官），它需要提高Al_3Fe中间金属的硬度和高度敏感性？切割女性生殖器官是一种新的概念材料，有一种分级的成分，可以使用每个优势和/或产生每个优势。我提出了一种中心性方法，作为切割女性生殖器制造方法之一，它可以利用中心的区别 ... More 在熔化金属和硬颗粒之间的ipetal力。如果铝碎片（包括铁）被应用于中心燃料方法，那么Al-Al_3Fe中的一种生态切割女性生殖器官就可以被制造出来。However，在实验室的环境条件下，中心方法是很难采用高能见度和低热容量的混合物。真空中心铸造系统是一个目的、计划和设计的目的，以弥补旧系统的不足。一个新的系统是可靠的构造，而一个厚管的Al-Al_3Fe FGM是由Al-10质量pct Fe主合金制造的。铝矩阵中Al_3Fe间金属形态学已被检验。Al_3Fe颗粒的概况从粒度到针形状取决于FGM管径向方向的一个位置。分级的成分也进行了测试，从管内的纯铝到40体积pct Al_3Fe在管外平面上。相应分级的Young的调制和热扩展系数Al-Al_3Fe切割女性生殖器官的范围从71到99.5 GPa，从25.5·10^<-6>到21.3·10^<-6>/K，相应地。Tensile tests are done using thin standard specimen for which Al_3 Fe grains are homogeneously distributed and the average value is about 28 vol pct Al_3 Fe。86兆帕的张力强度为0.44毫米，张力强度为90兆帕，年轻人的张力强度为90兆帕。这是预期的，因为切割女性生殖器必须是一个耐穿好衣服和耐热的切割。Less（低）

Aluminum can scraps include small amount of steel cans unavoidably. It is difficult and costly to remove the steel cans perfectly and to refine the scrap. How do we remanufacture the scrap efficiently for a structural and component material from the viewpoint of ecology? This is the motivation of the present study. Considering the two phase diagram of aluminum-iron system, intermetallic compound of Al_3Fe is found first at aluminum rich side. Intermetallics are known as hard and brittle nature but, in general, they have a lot of unknown properties that are difficult to find out in references. Is it possible to manufacture Al-Al_3Fe functionally graded material (FGM) that takes advantage of the hardness and high melting point of Al_3Fe intermetallics? FGM is one of the new concept materials and has a graded composition to use each advantage and/or make up each disadvantage. I have proposed the centrifugal method as one of FGM manufacturing methods, which utilizes the difference of centr … More ipetal force between molten metal and hard particles. If the aluminum scraps including iron is applied to the centrifugal method, a kind of Eco-FGM of Al-Al_3Fe can be manufactured. However, the centrifugal method in the laboratory of an ambient condition holds a difficulty to adopt to the high viscosity and low heat capacity alloy melt. The vacuum centrifugal casting system is, thus, planed and designed to overcome the shortage of the former system. A new system is satisfactorily constructed and Al-Al_3Fe FGM of a thick-walled tube is manufactured from Al-10 mass pct Fe master alloy. The morphology of Al_3Fe intermetallic in the aluminum matrix is examined. Profiles of Al_3Fe grain are changed from granular to needle shape depending one the position in the radial direction of the FGM tube. The graded composition is also examined and is varied from pure aluminum at inside of the tube to 40 vol pct Al_3Fe at outer plane of the tube. The corresponding graded Young's modulus and thermal expansion coefficient of Al-Al_3Fe FGM are in the range from 71 to 99.5 GPa and from 25.5・10^<-6> to 21.3・10^<-6>/K,respectively. Tensile tests are done using thin standard specimen for which Al_3Fe grains are homogeneously distributed and the average value is about 28 vol pct Al_3Fe. Tensile strength of 86 MPa at 0.44 pct tensile strain and Young's modulus of 90 GPa are obtained. It is expected that the FGM must be a good wear resistant and heat resistant FGM. Less